./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98ed95c4a54f5ccebfa7d8542fee1c186675c886b13abb30be9edee4d8cb102c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:06:16,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:06:16,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:06:16,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:06:16,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:06:16,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:06:16,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:06:16,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:06:16,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:06:16,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:06:16,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:06:16,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:06:16,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:06:16,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:06:16,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:06:16,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:06:16,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:06:16,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:06:16,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:06:16,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:06:16,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:06:16,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:06:16,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:06:16,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:06:16,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:06:16,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:06:16,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:06:16,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:06:16,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:06:16,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:06:16,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:06:16,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:06:16,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:06:16,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:06:16,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:06:16,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:06:16,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:06:16,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:06:16,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:06:16,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:06:16,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:06:16,713 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:06:16,739 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:06:16,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:06:16,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:06:16,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:06:16,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:06:16,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:06:16,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:06:16,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:06:16,741 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:06:16,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:06:16,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:06:16,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:06:16,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:06:16,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:06:16,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:06:16,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:06:16,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:06:16,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:06:16,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:06:16,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:06:16,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:06:16,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:06:16,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:06:16,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:06:16,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:06:16,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:06:16,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:06:16,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:06:16,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:06:16,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:06:16,746 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:06:16,746 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:06:16,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:06:16,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:06:16,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98ed95c4a54f5ccebfa7d8542fee1c186675c886b13abb30be9edee4d8cb102c [2021-12-07 01:06:16,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:06:16,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:06:16,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:06:16,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:06:16,943 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:06:16,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c [2021-12-07 01:06:16,990 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/b2d4e635d/02068bca21794312955b9579b9988393/FLAGc605ee600 [2021-12-07 01:06:17,381 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:06:17,382 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c [2021-12-07 01:06:17,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/b2d4e635d/02068bca21794312955b9579b9988393/FLAGc605ee600 [2021-12-07 01:06:17,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/b2d4e635d/02068bca21794312955b9579b9988393 [2021-12-07 01:06:17,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:06:17,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:06:17,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:06:17,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:06:17,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:06:17,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e29916e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17, skipping insertion in model container [2021-12-07 01:06:17,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:06:17,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:06:17,564 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[1995,2008] [2021-12-07 01:06:17,567 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[2364,2377] [2021-12-07 01:06:17,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:06:17,597 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:06:17,607 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[1995,2008] [2021-12-07 01:06:17,608 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[2364,2377] [2021-12-07 01:06:17,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:06:17,637 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:06:17,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17 WrapperNode [2021-12-07 01:06:17,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:06:17,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:06:17,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:06:17,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:06:17,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,667 INFO L137 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2021-12-07 01:06:17,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:06:17,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:06:17,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:06:17,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:06:17,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:06:17,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:06:17,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:06:17,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:06:17,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (1/1) ... [2021-12-07 01:06:17,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:06:17,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:06:17,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:06:17,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:06:17,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:06:17,754 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-07 01:06:17,754 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-07 01:06:17,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:06:17,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:06:17,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:06:17,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:06:17,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:06:17,806 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:06:17,807 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:06:17,967 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:06:17,972 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:06:17,973 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 01:06:17,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:06:17 BoogieIcfgContainer [2021-12-07 01:06:17,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:06:17,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:06:17,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:06:17,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:06:17,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:06:17" (1/3) ... [2021-12-07 01:06:17,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee2c0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:06:17, skipping insertion in model container [2021-12-07 01:06:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:17" (2/3) ... [2021-12-07 01:06:17,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee2c0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:06:17, skipping insertion in model container [2021-12-07 01:06:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:06:17" (3/3) ... [2021-12-07 01:06:17,980 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_3a.c.cil.c [2021-12-07 01:06:17,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:06:17,986 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-07 01:06:18,023 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:06:18,028 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=PETRI_NET, 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 [2021-12-07 01:06:18,028 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-07 01:06:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:06:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:06:18,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:06:18,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:06:18,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:06:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:06:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-07 01:06:18,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:06:18,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482464724] [2021-12-07 01:06:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:06:18,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:06:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:06:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:06:18,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:06:18,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482464724] [2021-12-07 01:06:18,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482464724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:06:18,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:06:18,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:06:18,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772229806] [2021-12-07 01:06:18,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:06:18,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:06:18,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:06:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:06:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:06:18,206 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-07 01:06:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:06:18,231 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2021-12-07 01:06:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:06:18,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-07 01:06:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:06:18,239 INFO L225 Difference]: With dead ends: 115 [2021-12-07 01:06:18,240 INFO L226 Difference]: Without dead ends: 51 [2021-12-07 01:06:18,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:06:18,245 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:06:18,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:06:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-07 01:06:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-07 01:06:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:06:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-12-07 01:06:18,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2021-12-07 01:06:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:06:18,277 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-12-07 01:06:18,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-07 01:06:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-12-07 01:06:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:06:18,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:06:18,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:06:18,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:06:18,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:06:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:06:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-07 01:06:18,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:06:18,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047056622] [2021-12-07 01:06:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:06:18,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:06:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:06:18,295 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 01:06:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 01:06:18,315 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 01:06:18,315 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-07 01:06:18,317 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-07 01:06:18,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-07 01:06:18,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:06:18,321 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-07 01:06:18,324 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 01:06:18,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:06:18 BoogieIcfgContainer [2021-12-07 01:06:18,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 01:06:18,339 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 01:06:18,339 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 01:06:18,339 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 01:06:18,339 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:06:17" (3/4) ... [2021-12-07 01:06:18,342 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-07 01:06:18,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 01:06:18,343 INFO L158 Benchmark]: Toolchain (without parser) took 941.81ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 60.1MB in the beginning and 101.3MB in the end (delta: -41.2MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. [2021-12-07 01:06:18,343 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 94.4MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:06:18,343 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.88ms. Allocated memory is still 94.4MB. Free memory was 59.9MB in the beginning and 66.8MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 01:06:18,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.25ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 64.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:06:18,344 INFO L158 Benchmark]: Boogie Preprocessor took 20.79ms. Allocated memory is still 94.4MB. Free memory was 64.8MB in the beginning and 63.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:06:18,345 INFO L158 Benchmark]: RCFGBuilder took 284.98ms. Allocated memory is still 94.4MB. Free memory was 63.5MB in the beginning and 49.7MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-07 01:06:18,345 INFO L158 Benchmark]: TraceAbstraction took 363.30ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 49.2MB in the beginning and 102.1MB in the end (delta: -52.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:06:18,345 INFO L158 Benchmark]: Witness Printer took 3.04ms. Allocated memory is still 138.4MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:06:18,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 94.4MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.88ms. Allocated memory is still 94.4MB. Free memory was 59.9MB in the beginning and 66.8MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.25ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 64.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.79ms. Allocated memory is still 94.4MB. Free memory was 64.8MB in the beginning and 63.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 284.98ms. Allocated memory is still 94.4MB. Free memory was 63.5MB in the beginning and 49.7MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 363.30ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 49.2MB in the beginning and 102.1MB in the end (delta: -52.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.04ms. Allocated memory is still 138.4MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L320] COND TRUE __VERIFIER_nondet_int() [L321] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 60 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 81 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-07 01:06:18,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98ed95c4a54f5ccebfa7d8542fee1c186675c886b13abb30be9edee4d8cb102c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:06:19,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:06:19,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:06:20,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:06:20,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:06:20,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:06:20,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:06:20,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:06:20,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:06:20,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:06:20,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:06:20,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:06:20,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:06:20,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:06:20,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:06:20,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:06:20,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:06:20,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:06:20,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:06:20,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:06:20,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:06:20,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:06:20,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:06:20,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:06:20,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:06:20,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:06:20,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:06:20,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:06:20,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:06:20,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:06:20,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:06:20,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:06:20,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:06:20,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:06:20,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:06:20,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:06:20,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:06:20,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:06:20,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:06:20,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:06:20,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:06:20,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-07 01:06:20,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:06:20,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:06:20,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:06:20,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:06:20,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:06:20,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:06:20,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:06:20,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:06:20,085 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:06:20,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:06:20,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:06:20,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:06:20,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:06:20,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:06:20,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:06:20,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:06:20,086 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:06:20,086 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:06:20,086 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:06:20,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:06:20,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:06:20,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:06:20,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:06:20,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:06:20,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:06:20,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:06:20,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:06:20,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:06:20,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:06:20,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:06:20,088 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:06:20,088 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:06:20,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:06:20,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:06:20,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:06:20,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:06:20,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:06:20,089 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98ed95c4a54f5ccebfa7d8542fee1c186675c886b13abb30be9edee4d8cb102c [2021-12-07 01:06:20,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:06:20,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:06:20,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:06:20,347 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:06:20,348 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:06:20,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c [2021-12-07 01:06:20,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/00bd4fdad/f42fcf48e18b44cb8c4597445d1793e9/FLAG76d5ddd44 [2021-12-07 01:06:20,790 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:06:20,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c [2021-12-07 01:06:20,799 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/00bd4fdad/f42fcf48e18b44cb8c4597445d1793e9/FLAG76d5ddd44 [2021-12-07 01:06:20,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/data/00bd4fdad/f42fcf48e18b44cb8c4597445d1793e9 [2021-12-07 01:06:20,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:06:20,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:06:20,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:06:20,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:06:20,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:06:20,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:06:20" (1/1) ... [2021-12-07 01:06:20,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b02fc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:20, skipping insertion in model container [2021-12-07 01:06:20,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:06:20" (1/1) ... [2021-12-07 01:06:20,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:06:20,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:06:20,982 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[1995,2008] [2021-12-07 01:06:20,986 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[2364,2377] [2021-12-07 01:06:21,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:06:21,026 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:06:21,038 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[1995,2008] [2021-12-07 01:06:21,040 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_01b598bd-1484-4b46-82f3-6fd9246a7b1e/sv-benchmarks/c/combinations/square_8+soft_float_3a.c.cil.c[2364,2377] [2021-12-07 01:06:21,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:06:21,072 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:06:21,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21 WrapperNode [2021-12-07 01:06:21,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:06:21,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:06:21,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:06:21,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:06:21,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,106 INFO L137 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2021-12-07 01:06:21,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:06:21,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:06:21,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:06:21,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:06:21,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:06:21,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:06:21,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:06:21,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:06:21,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (1/1) ... [2021-12-07 01:06:21,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:06:21,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:06:21,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:06:21,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:06:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:06:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 01:06:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-07 01:06:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-07 01:06:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:06:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:06:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:06:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:06:21,251 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:06:21,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:06:23,606 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:06:23,611 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:06:23,612 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 01:06:23,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:06:23 BoogieIcfgContainer [2021-12-07 01:06:23,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:06:23,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:06:23,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:06:23,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:06:23,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:06:20" (1/3) ... [2021-12-07 01:06:23,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40df4899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:06:23, skipping insertion in model container [2021-12-07 01:06:23,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:06:21" (2/3) ... [2021-12-07 01:06:23,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40df4899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:06:23, skipping insertion in model container [2021-12-07 01:06:23,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:06:23" (3/3) ... [2021-12-07 01:06:23,619 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_3a.c.cil.c [2021-12-07 01:06:23,623 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:06:23,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-07 01:06:23,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:06:23,664 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=PETRI_NET, 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 [2021-12-07 01:06:23,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-07 01:06:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 01:06:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:06:23,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:06:23,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:06:23,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:06:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:06:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-07 01:06:23,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:06:23,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585274512] [2021-12-07 01:06:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:06:23,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:06:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:06:23,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:06:23,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:06:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:06:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 01:06:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:06:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:06:24,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:06:24,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:06:24,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585274512] [2021-12-07 01:06:24,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585274512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:06:24,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:06:24,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:06:24,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429566419] [2021-12-07 01:06:24,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:06:24,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:06:24,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:06:24,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:06:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:06:24,209 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-07 01:06:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:06:24,232 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2021-12-07 01:06:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:06:24,234 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-07 01:06:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:06:24,239 INFO L225 Difference]: With dead ends: 115 [2021-12-07 01:06:24,239 INFO L226 Difference]: Without dead ends: 51 [2021-12-07 01:06:24,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:06:24,244 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:06:24,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:06:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-07 01:06:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-07 01:06:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:06:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-12-07 01:06:24,273 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2021-12-07 01:06:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:06:24,273 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-12-07 01:06:24,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-07 01:06:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-12-07 01:06:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:06:24,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:06:24,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:06:24,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:06:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:06:24,476 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:06:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:06:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-07 01:06:24,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:06:24,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368398158] [2021-12-07 01:06:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:06:24,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:06:24,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:06:24,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:06:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:06:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:06:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:06:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:06:50,273 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-12-07 01:07:40,377 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-12-07 01:07:42,421 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-12-07 01:07:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:07:42,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:07:42,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:42,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368398158] [2021-12-07 01:07:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368398158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:07:42,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:07:42,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:07:42,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156312190] [2021-12-07 01:07:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:07:42,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:07:42,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:07:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-07 01:07:42,429 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-12-07 01:07:44,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-07 01:07:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:44,913 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-12-07 01:07:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:07:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 7 [2021-12-07 01:07:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:44,915 INFO L225 Difference]: With dead ends: 51 [2021-12-07 01:07:44,915 INFO L226 Difference]: Without dead ends: 46 [2021-12-07 01:07:44,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-12-07 01:07:44,917 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:44,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 175 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 135 Unchecked, 2.3s Time] [2021-12-07 01:07:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-07 01:07:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-07 01:07:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:07:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2021-12-07 01:07:44,925 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2021-12-07 01:07:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:44,925 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2021-12-07 01:07:44,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-12-07 01:07:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2021-12-07 01:07:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 01:07:44,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:44,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:44,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-07 01:07:45,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:45,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2021-12-07 01:07:45,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:45,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280453619] [2021-12-07 01:07:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:45,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:45,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:45,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:07:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:45,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:07:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:45,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:07:45,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:45,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280453619] [2021-12-07 01:07:45,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280453619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:07:45,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:07:45,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:07:45,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945943343] [2021-12-07 01:07:45,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:07:45,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:07:45,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:45,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:07:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:07:45,380 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:45,600 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2021-12-07 01:07:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:07:45,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-12-07 01:07:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:45,604 INFO L225 Difference]: With dead ends: 102 [2021-12-07 01:07:45,604 INFO L226 Difference]: Without dead ends: 60 [2021-12-07 01:07:45,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:07:45,606 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:45,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:07:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-07 01:07:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-12-07 01:07:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:07:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2021-12-07 01:07:45,617 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2021-12-07 01:07:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:45,617 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2021-12-07 01:07:45,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2021-12-07 01:07:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:07:45,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:45,619 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:45,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 01:07:45,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:45,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2021-12-07 01:07:45,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065669234] [2021-12-07 01:07:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:45,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:45,822 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:45,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:07:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:07:45,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:46,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:07:46,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:46,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065669234] [2021-12-07 01:07:46,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065669234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:07:46,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:07:46,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:07:46,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569721876] [2021-12-07 01:07:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:07:46,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:07:46,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:07:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:07:46,032 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:46,222 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2021-12-07 01:07:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:07:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2021-12-07 01:07:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:46,225 INFO L225 Difference]: With dead ends: 106 [2021-12-07 01:07:46,225 INFO L226 Difference]: Without dead ends: 63 [2021-12-07 01:07:46,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:07:46,228 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:46,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:07:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-07 01:07:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-12-07 01:07:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:07:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2021-12-07 01:07:46,241 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2021-12-07 01:07:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:46,242 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2021-12-07 01:07:46,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2021-12-07 01:07:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:07:46,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:46,245 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:46,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-07 01:07:46,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:46,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2021-12-07 01:07:46,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:46,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724796713] [2021-12-07 01:07:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:46,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:46,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:46,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:07:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:07:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:46,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:07:46,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724796713] [2021-12-07 01:07:46,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724796713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:07:46,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:07:46,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:07:46,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337388014] [2021-12-07 01:07:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:07:46,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:07:46,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:07:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:07:46,728 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:46,963 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2021-12-07 01:07:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:07:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-12-07 01:07:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:46,966 INFO L225 Difference]: With dead ends: 115 [2021-12-07 01:07:46,966 INFO L226 Difference]: Without dead ends: 67 [2021-12-07 01:07:46,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:07:46,968 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:46,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:07:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-07 01:07:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-12-07 01:07:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:07:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-07 01:07:46,977 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2021-12-07 01:07:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:46,977 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-07 01:07:46,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-07 01:07:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:07:46,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:46,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:46,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:07:47,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:47,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:47,183 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2021-12-07 01:07:47,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932630945] [2021-12-07 01:07:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:47,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:47,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:47,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:07:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:07:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:47,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:07:47,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932630945] [2021-12-07 01:07:47,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932630945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:07:47,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:07:47,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:07:47,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531215589] [2021-12-07 01:07:47,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:07:47,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:07:47,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:07:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:07:47,472 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:47,895 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2021-12-07 01:07:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:07:47,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-12-07 01:07:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:47,898 INFO L225 Difference]: With dead ends: 123 [2021-12-07 01:07:47,898 INFO L226 Difference]: Without dead ends: 74 [2021-12-07 01:07:47,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:07:47,899 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:47,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:07:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-07 01:07:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2021-12-07 01:07:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 50 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:07:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2021-12-07 01:07:47,917 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2021-12-07 01:07:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:47,917 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2021-12-07 01:07:47,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:07:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2021-12-07 01:07:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:07:47,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:47,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:47,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 01:07:48,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:48,122 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:48,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2021-12-07 01:07:48,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:48,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347995820] [2021-12-07 01:07:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:48,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:48,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:48,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 01:07:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:07:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:48,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:07:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:07:48,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:48,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347995820] [2021-12-07 01:07:48,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347995820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:07:48,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:07:48,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 01:07:48,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113360096] [2021-12-07 01:07:48,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:07:48,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:07:48,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:07:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:07:48,919 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:07:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:49,577 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2021-12-07 01:07:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:07:49,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-07 01:07:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:49,580 INFO L225 Difference]: With dead ends: 144 [2021-12-07 01:07:49,580 INFO L226 Difference]: Without dead ends: 94 [2021-12-07 01:07:49,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:07:49,581 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 52 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:49,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 285 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:07:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-07 01:07:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2021-12-07 01:07:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 58 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:07:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2021-12-07 01:07:49,591 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 48 [2021-12-07 01:07:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:49,592 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2021-12-07 01:07:49,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:07:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2021-12-07 01:07:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 01:07:49,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:49,593 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:49,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 01:07:49,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:49,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -588856565, now seen corresponding path program 1 times [2021-12-07 01:07:49,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:49,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339782832] [2021-12-07 01:07:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:49,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:49,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:49,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 01:07:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:07:49,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:50,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:07:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:07:50,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:50,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339782832] [2021-12-07 01:07:50,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339782832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:07:50,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:07:50,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-07 01:07:50,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754411558] [2021-12-07 01:07:50,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:07:50,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:07:50,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:50,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:07:50,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:07:50,633 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:07:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:51,492 INFO L93 Difference]: Finished difference Result 162 states and 234 transitions. [2021-12-07 01:07:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:07:51,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-12-07 01:07:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:51,494 INFO L225 Difference]: With dead ends: 162 [2021-12-07 01:07:51,495 INFO L226 Difference]: Without dead ends: 104 [2021-12-07 01:07:51,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:07:51,496 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 138 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:51,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 250 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:07:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-07 01:07:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2021-12-07 01:07:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 62 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:07:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2021-12-07 01:07:51,510 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 50 [2021-12-07 01:07:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:51,510 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2021-12-07 01:07:51,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:07:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2021-12-07 01:07:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 01:07:51,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:51,512 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:51,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 01:07:51,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:51,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1889085224, now seen corresponding path program 2 times [2021-12-07 01:07:51,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:51,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859952061] [2021-12-07 01:07:51,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:07:51,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:51,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:51,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:51,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 01:07:51,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:07:51,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:07:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:07:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-07 01:07:51,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:07:51,971 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:51,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859952061] [2021-12-07 01:07:51,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859952061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:07:51,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:07:51,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:07:51,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466090045] [2021-12-07 01:07:51,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:07:51,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:07:51,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:07:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:07:51,973 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:07:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:52,121 INFO L93 Difference]: Finished difference Result 110 states and 159 transitions. [2021-12-07 01:07:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:07:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-12-07 01:07:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:52,124 INFO L225 Difference]: With dead ends: 110 [2021-12-07 01:07:52,124 INFO L226 Difference]: Without dead ends: 89 [2021-12-07 01:07:52,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:07:52,125 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:52,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 297 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:07:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-07 01:07:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-12-07 01:07:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 70 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:07:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2021-12-07 01:07:52,137 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 57 [2021-12-07 01:07:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:52,137 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2021-12-07 01:07:52,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:07:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2021-12-07 01:07:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 01:07:52,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:52,139 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:52,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 01:07:52,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:52,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1704817494, now seen corresponding path program 1 times [2021-12-07 01:07:52,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:52,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643260533] [2021-12-07 01:07:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:52,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:52,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:52,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:52,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 01:07:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:52,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:07:52,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:52,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:07:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:07:53,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:53,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643260533] [2021-12-07 01:07:53,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643260533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:07:53,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:07:53,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-07 01:07:53,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444250989] [2021-12-07 01:07:53,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:07:53,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:07:53,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:07:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:07:53,785 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:07:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:07:55,959 INFO L93 Difference]: Finished difference Result 221 states and 318 transitions. [2021-12-07 01:07:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:07:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2021-12-07 01:07:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:07:55,962 INFO L225 Difference]: With dead ends: 221 [2021-12-07 01:07:55,962 INFO L226 Difference]: Without dead ends: 150 [2021-12-07 01:07:55,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:07:55,964 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 178 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:55,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 505 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-07 01:07:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-07 01:07:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 93. [2021-12-07 01:07:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 84 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:07:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2021-12-07 01:07:55,979 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 57 [2021-12-07 01:07:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:07:55,979 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2021-12-07 01:07:55,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:07:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2021-12-07 01:07:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-07 01:07:55,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:07:55,980 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:07:55,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-07 01:07:56,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:07:56,182 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:07:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:07:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -848364147, now seen corresponding path program 1 times [2021-12-07 01:07:56,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:07:56,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710193879] [2021-12-07 01:07:56,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:07:56,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:07:56,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:07:56,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:07:56,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 01:07:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:07:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:07:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:07:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:07:56,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:07:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:07:58,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:07:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710193879] [2021-12-07 01:07:58,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710193879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:07:58,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:07:58,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-07 01:07:58,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897129074] [2021-12-07 01:07:58,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:07:58,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:07:58,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:07:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:07:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:07:58,167 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:01,363 INFO L93 Difference]: Finished difference Result 244 states and 356 transitions. [2021-12-07 01:08:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 01:08:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2021-12-07 01:08:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:01,366 INFO L225 Difference]: With dead ends: 244 [2021-12-07 01:08:01,366 INFO L226 Difference]: Without dead ends: 159 [2021-12-07 01:08:01,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=354, Invalid=638, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:08:01,368 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 321 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:01,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 786 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-07 01:08:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-07 01:08:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2021-12-07 01:08:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 94 states have internal predecessors, (135), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:08:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 153 transitions. [2021-12-07 01:08:01,387 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 153 transitions. Word has length 62 [2021-12-07 01:08:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:01,387 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 153 transitions. [2021-12-07 01:08:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 153 transitions. [2021-12-07 01:08:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-07 01:08:01,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:01,389 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:01,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-07 01:08:01,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:08:01,590 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:01,591 INFO L85 PathProgramCache]: Analyzing trace with hash -115561174, now seen corresponding path program 2 times [2021-12-07 01:08:01,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:08:01,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342304009] [2021-12-07 01:08:01,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:08:01,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:08:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:08:01,595 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:08:01,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 01:08:01,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:08:01,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:08:01,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:08:01,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-07 01:08:01,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:08:01,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:08:01,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342304009] [2021-12-07 01:08:01,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342304009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:08:01,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:08:01,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:08:01,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506411829] [2021-12-07 01:08:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:08:01,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:08:01,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:08:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:08:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:08:01,730 INFO L87 Difference]: Start difference. First operand 103 states and 153 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:08:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:01,747 INFO L93 Difference]: Finished difference Result 112 states and 163 transitions. [2021-12-07 01:08:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:08:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2021-12-07 01:08:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:01,749 INFO L225 Difference]: With dead ends: 112 [2021-12-07 01:08:01,749 INFO L226 Difference]: Without dead ends: 103 [2021-12-07 01:08:01,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:08:01,750 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:01,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:08:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-07 01:08:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-07 01:08:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 92 states have (on average 1.4565217391304348) internal successors, (134), 94 states have internal predecessors, (134), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:08:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 152 transitions. [2021-12-07 01:08:01,759 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 152 transitions. Word has length 75 [2021-12-07 01:08:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:01,760 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 152 transitions. [2021-12-07 01:08:01,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:08:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 152 transitions. [2021-12-07 01:08:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 01:08:01,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:01,761 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:01,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-07 01:08:01,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:08:01,962 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:01,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1364778096, now seen corresponding path program 1 times [2021-12-07 01:08:01,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:08:01,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362444266] [2021-12-07 01:08:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:01,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:08:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:08:01,967 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:08:01,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-07 01:08:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:02,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:08:02,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:08:03,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:08:05,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:08:05,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362444266] [2021-12-07 01:08:05,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362444266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:05,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:05,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-07 01:08:05,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801512337] [2021-12-07 01:08:05,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:05,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 01:08:05,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:08:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 01:08:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:08:05,749 INFO L87 Difference]: Start difference. First operand 103 states and 152 transitions. Second operand has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:14,349 INFO L93 Difference]: Finished difference Result 347 states and 504 transitions. [2021-12-07 01:08:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:08:14,351 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2021-12-07 01:08:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:14,353 INFO L225 Difference]: With dead ends: 347 [2021-12-07 01:08:14,353 INFO L226 Difference]: Without dead ends: 252 [2021-12-07 01:08:14,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=729, Invalid=1433, Unknown=0, NotChecked=0, Total=2162 [2021-12-07 01:08:14,355 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 642 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:14,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1561 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-07 01:08:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-07 01:08:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 129. [2021-12-07 01:08:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 118 states have (on average 1.5) internal successors, (177), 120 states have internal predecessors, (177), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:08:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 195 transitions. [2021-12-07 01:08:14,372 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 195 transitions. Word has length 77 [2021-12-07 01:08:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 195 transitions. [2021-12-07 01:08:14,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 195 transitions. [2021-12-07 01:08:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-07 01:08:14,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:14,373 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:14,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-07 01:08:14,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:08:14,574 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:14,576 INFO L85 PathProgramCache]: Analyzing trace with hash 875383315, now seen corresponding path program 1 times [2021-12-07 01:08:14,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:08:14,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824123170] [2021-12-07 01:08:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:14,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:08:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:08:14,580 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:08:14,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 01:08:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:14,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:08:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:08:16,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:08:19,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:08:19,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824123170] [2021-12-07 01:08:19,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824123170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:19,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:19,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-12-07 01:08:19,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851212764] [2021-12-07 01:08:19,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:19,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:08:19,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:08:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:08:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:08:19,692 INFO L87 Difference]: Start difference. First operand 129 states and 195 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:28,312 INFO L93 Difference]: Finished difference Result 348 states and 510 transitions. [2021-12-07 01:08:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-07 01:08:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2021-12-07 01:08:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:28,315 INFO L225 Difference]: With dead ends: 348 [2021-12-07 01:08:28,315 INFO L226 Difference]: Without dead ends: 227 [2021-12-07 01:08:28,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=991, Invalid=2315, Unknown=0, NotChecked=0, Total=3306 [2021-12-07 01:08:28,317 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 777 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:28,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 1660 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-07 01:08:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-07 01:08:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 133. [2021-12-07 01:08:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 124 states have internal predecessors, (184), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:08:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2021-12-07 01:08:28,332 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 88 [2021-12-07 01:08:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:28,332 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2021-12-07 01:08:28,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2021-12-07 01:08:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-07 01:08:28,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:28,333 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:28,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 01:08:28,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:08:28,534 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1663337104, now seen corresponding path program 2 times [2021-12-07 01:08:28,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:08:28,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818299572] [2021-12-07 01:08:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:08:28,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:08:28,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:08:28,535 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:08:28,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-07 01:08:28,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:08:28,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:08:28,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:08:28,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-12-07 01:08:28,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:08:28,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:08:28,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818299572] [2021-12-07 01:08:28,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818299572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:08:28,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:08:28,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:08:28,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512253757] [2021-12-07 01:08:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:08:28,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:08:28,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:08:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:08:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:08:28,724 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:08:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:28,856 INFO L93 Difference]: Finished difference Result 170 states and 252 transitions. [2021-12-07 01:08:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:08:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 113 [2021-12-07 01:08:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:28,858 INFO L225 Difference]: With dead ends: 170 [2021-12-07 01:08:28,858 INFO L226 Difference]: Without dead ends: 160 [2021-12-07 01:08:28,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:08:28,859 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 44 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:28,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 202 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:08:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-07 01:08:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2021-12-07 01:08:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 127 states have (on average 1.4960629921259843) internal successors, (190), 129 states have internal predecessors, (190), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:08:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 208 transitions. [2021-12-07 01:08:28,872 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 208 transitions. Word has length 113 [2021-12-07 01:08:28,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:28,872 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 208 transitions. [2021-12-07 01:08:28,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:08:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 208 transitions. [2021-12-07 01:08:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-07 01:08:28,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:28,876 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:28,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-07 01:08:29,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:08:29,076 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1822283566, now seen corresponding path program 1 times [2021-12-07 01:08:29,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:08:29,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506958895] [2021-12-07 01:08:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:29,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:08:29,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:08:29,078 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:08:29,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-07 01:08:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 01:08:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:08:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:08:41,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:08:41,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506958895] [2021-12-07 01:08:41,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506958895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:41,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:41,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-07 01:08:41,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098437321] [2021-12-07 01:08:41,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:41,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 01:08:41,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:08:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 01:08:41,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 01:08:41,056 INFO L87 Difference]: Start difference. First operand 138 states and 208 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:09:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:19,954 INFO L93 Difference]: Finished difference Result 591 states and 868 transitions. [2021-12-07 01:09:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-07 01:09:19,956 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 113 [2021-12-07 01:09:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:19,959 INFO L225 Difference]: With dead ends: 591 [2021-12-07 01:09:19,959 INFO L226 Difference]: Without dead ends: 461 [2021-12-07 01:09:19,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=2901, Invalid=6029, Unknown=0, NotChecked=0, Total=8930 [2021-12-07 01:09:19,964 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 2260 mSDsluCounter, 4808 mSDsCounter, 0 mSdLazyCounter, 4147 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2260 SdHoareTripleChecker+Valid, 5017 SdHoareTripleChecker+Invalid, 4492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 4147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:19,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2260 Valid, 5017 Invalid, 4492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 4147 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2021-12-07 01:09:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-07 01:09:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 206. [2021-12-07 01:09:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 195 states have (on average 1.5538461538461539) internal successors, (303), 197 states have internal predecessors, (303), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-07 01:09:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 321 transitions. [2021-12-07 01:09:19,991 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 321 transitions. Word has length 113 [2021-12-07 01:09:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:19,995 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 321 transitions. [2021-12-07 01:09:19,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:09:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 321 transitions. [2021-12-07 01:09:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:09:19,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:19,997 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:20,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-07 01:09:20,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:09:20,198 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:09:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 239945809, now seen corresponding path program 1 times [2021-12-07 01:09:20,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:09:20,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699467449] [2021-12-07 01:09:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:20,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:09:20,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:09:20,200 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:09:20,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-07 01:09:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:09:20,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 10 proven. 836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:09:27,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 10 proven. 836 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:09:42,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:09:42,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699467449] [2021-12-07 01:09:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699467449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:09:42,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:09:42,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 66 [2021-12-07 01:09:42,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100661985] [2021-12-07 01:09:42,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:42,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-07 01:09:42,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:09:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-07 01:09:42,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=3524, Unknown=0, NotChecked=0, Total=4290 [2021-12-07 01:09:42,546 INFO L87 Difference]: Start difference. First operand 206 states and 321 transitions. Second operand has 66 states, 66 states have (on average 2.878787878787879) internal successors, (190), 62 states have internal predecessors, (190), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:12:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:42,318 INFO L93 Difference]: Finished difference Result 570 states and 1123 transitions. [2021-12-07 01:12:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2021-12-07 01:12:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.878787878787879) internal successors, (190), 62 states have internal predecessors, (190), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 118 [2021-12-07 01:12:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:42,327 INFO L225 Difference]: With dead ends: 570 [2021-12-07 01:12:42,327 INFO L226 Difference]: Without dead ends: 547 [2021-12-07 01:12:42,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18854 ImplicationChecksByTransitivity, 139.2s TimeCoverageRelationStatistics Valid=11300, Invalid=45582, Unknown=0, NotChecked=0, Total=56882 [2021-12-07 01:12:42,341 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2320 mSDsluCounter, 3484 mSDsCounter, 0 mSdLazyCounter, 11832 mSolverCounterSat, 1701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 13533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1701 IncrementalHoareTripleChecker+Valid, 11832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:42,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2328 Valid, 3585 Invalid, 13533 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1701 Valid, 11832 Invalid, 0 Unknown, 0 Unchecked, 56.7s Time] [2021-12-07 01:12:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-07 01:12:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 224. [2021-12-07 01:12:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 210 states have (on average 1.5476190476190477) internal successors, (325), 213 states have internal predecessors, (325), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-07 01:12:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 357 transitions. [2021-12-07 01:12:42,421 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 357 transitions. Word has length 118 [2021-12-07 01:12:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:42,422 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 357 transitions. [2021-12-07 01:12:42,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.878787878787879) internal successors, (190), 62 states have internal predecessors, (190), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:12:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 357 transitions. [2021-12-07 01:12:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:12:42,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:42,423 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-07 01:12:42,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-07 01:12:42,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:42,625 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:12:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash 729167484, now seen corresponding path program 1 times [2021-12-07 01:12:42,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:42,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241799029] [2021-12-07 01:12:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:12:42,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:42,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:42,631 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:42,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 01:12:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:12:42,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:12:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-07 01:12:42,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:12:42,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:42,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241799029] [2021-12-07 01:12:42,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241799029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:12:42,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:12:42,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:12:42,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026499562] [2021-12-07 01:12:42,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:12:42,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:12:42,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:42,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:12:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:12:42,893 INFO L87 Difference]: Start difference. First operand 224 states and 357 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:42,983 INFO L93 Difference]: Finished difference Result 234 states and 368 transitions. [2021-12-07 01:12:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:12:42,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 122 [2021-12-07 01:12:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:42,985 INFO L225 Difference]: With dead ends: 234 [2021-12-07 01:12:42,985 INFO L226 Difference]: Without dead ends: 224 [2021-12-07 01:12:42,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:12:42,986 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:42,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 185 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:12:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-07 01:12:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2021-12-07 01:12:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 205 states have (on average 1.551219512195122) internal successors, (318), 208 states have internal predecessors, (318), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-07 01:12:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 350 transitions. [2021-12-07 01:12:43,013 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 350 transitions. Word has length 122 [2021-12-07 01:12:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:43,014 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 350 transitions. [2021-12-07 01:12:43,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 350 transitions. [2021-12-07 01:12:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:12:43,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:43,015 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-07 01:12:43,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-07 01:12:43,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:43,215 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:12:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash -80179142, now seen corresponding path program 1 times [2021-12-07 01:12:43,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376206952] [2021-12-07 01:12:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:12:43,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:43,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:43,217 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:43,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-07 01:12:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:12:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:12:43,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-07 01:12:43,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:12:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-07 01:12:43,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376206952] [2021-12-07 01:12:43,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376206952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:12:43,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:12:43,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-07 01:12:43,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60776190] [2021-12-07 01:12:43,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:12:43,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:12:43,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:12:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:12:43,896 INFO L87 Difference]: Start difference. First operand 219 states and 350 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:12:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:44,079 INFO L93 Difference]: Finished difference Result 250 states and 398 transitions. [2021-12-07 01:12:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:12:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 122 [2021-12-07 01:12:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:44,082 INFO L225 Difference]: With dead ends: 250 [2021-12-07 01:12:44,082 INFO L226 Difference]: Without dead ends: 245 [2021-12-07 01:12:44,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:12:44,083 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 19 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:44,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 286 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:12:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-07 01:12:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-12-07 01:12:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 226 states have (on average 1.5309734513274336) internal successors, (346), 227 states have internal predecessors, (346), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-07 01:12:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 389 transitions. [2021-12-07 01:12:44,109 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 389 transitions. Word has length 122 [2021-12-07 01:12:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:44,109 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 389 transitions. [2021-12-07 01:12:44,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:12:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 389 transitions. [2021-12-07 01:12:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 01:12:44,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:44,110 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-07 01:12:44,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-07 01:12:44,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:44,311 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:12:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1019638336, now seen corresponding path program 1 times [2021-12-07 01:12:44,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:44,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351384981] [2021-12-07 01:12:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:12:44,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:44,314 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:44,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 01:12:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:12:44,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:12:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-07 01:12:44,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:12:44,576 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:44,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351384981] [2021-12-07 01:12:44,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351384981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:12:44,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:12:44,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:12:44,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317624129] [2021-12-07 01:12:44,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:12:44,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:12:44,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:44,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:12:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:12:44,579 INFO L87 Difference]: Start difference. First operand 242 states and 389 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:44,762 INFO L93 Difference]: Finished difference Result 265 states and 413 transitions. [2021-12-07 01:12:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:12:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 124 [2021-12-07 01:12:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:44,765 INFO L225 Difference]: With dead ends: 265 [2021-12-07 01:12:44,765 INFO L226 Difference]: Without dead ends: 259 [2021-12-07 01:12:44,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:12:44,766 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:44,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 229 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:12:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-07 01:12:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-12-07 01:12:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 241 states have (on average 1.5020746887966805) internal successors, (362), 242 states have internal predecessors, (362), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-07 01:12:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 405 transitions. [2021-12-07 01:12:44,795 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 405 transitions. Word has length 124 [2021-12-07 01:12:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:44,795 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 405 transitions. [2021-12-07 01:12:44,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 405 transitions. [2021-12-07 01:12:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 01:12:44,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:44,796 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-07 01:12:44,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-07 01:12:44,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:44,997 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:12:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1076896638, now seen corresponding path program 1 times [2021-12-07 01:12:44,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:44,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653321703] [2021-12-07 01:12:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:12:44,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:44,999 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:45,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 01:12:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:12:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:12:45,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-07 01:12:45,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:12:45,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:45,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653321703] [2021-12-07 01:12:45,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653321703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:12:45,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:12:45,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:12:45,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170829187] [2021-12-07 01:12:45,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:12:45,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:12:45,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:45,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:12:45,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:12:45,236 INFO L87 Difference]: Start difference. First operand 257 states and 405 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:45,388 INFO L93 Difference]: Finished difference Result 263 states and 410 transitions. [2021-12-07 01:12:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:12:45,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 124 [2021-12-07 01:12:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:45,392 INFO L225 Difference]: With dead ends: 263 [2021-12-07 01:12:45,392 INFO L226 Difference]: Without dead ends: 246 [2021-12-07 01:12:45,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:12:45,394 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:45,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 298 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:12:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-07 01:12:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2021-12-07 01:12:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 229 states have (on average 1.5109170305676856) internal successors, (346), 231 states have internal predecessors, (346), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2021-12-07 01:12:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 382 transitions. [2021-12-07 01:12:45,425 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 382 transitions. Word has length 124 [2021-12-07 01:12:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:45,426 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 382 transitions. [2021-12-07 01:12:45,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 382 transitions. [2021-12-07 01:12:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:12:45,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:45,427 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-07 01:12:45,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-07 01:12:45,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:45,628 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:12:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1258657602, now seen corresponding path program 1 times [2021-12-07 01:12:45,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:45,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871353522] [2021-12-07 01:12:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:12:45,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:45,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:45,634 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:45,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-07 01:12:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:12:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:12:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-07 01:12:46,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:12:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-07 01:12:46,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871353522] [2021-12-07 01:12:46,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871353522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:12:46,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:12:46,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-07 01:12:46,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402203285] [2021-12-07 01:12:46,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:12:46,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:12:46,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:12:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:12:46,357 INFO L87 Difference]: Start difference. First operand 244 states and 382 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:12:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:46,730 INFO L93 Difference]: Finished difference Result 260 states and 397 transitions. [2021-12-07 01:12:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:12:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 125 [2021-12-07 01:12:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:46,734 INFO L225 Difference]: With dead ends: 260 [2021-12-07 01:12:46,734 INFO L226 Difference]: Without dead ends: 234 [2021-12-07 01:12:46,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:12:46,735 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:46,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 401 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:12:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-07 01:12:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 226. [2021-12-07 01:12:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 212 states have (on average 1.528301886792453) internal successors, (324), 215 states have internal predecessors, (324), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-07 01:12:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 350 transitions. [2021-12-07 01:12:46,763 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 350 transitions. Word has length 125 [2021-12-07 01:12:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:46,763 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 350 transitions. [2021-12-07 01:12:46,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:12:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 350 transitions. [2021-12-07 01:12:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:12:46,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:46,764 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:12:46,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-07 01:12:46,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:46,966 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:12:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:46,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1209150703, now seen corresponding path program 2 times [2021-12-07 01:12:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:46,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329584895] [2021-12-07 01:12:46,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:12:46,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:46,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:46,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:12:47,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:12:47,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:12:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:12:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2021-12-07 01:12:47,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:12:47,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:47,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329584895] [2021-12-07 01:12:47,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329584895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:12:47,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:12:47,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:12:47,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610585000] [2021-12-07 01:12:47,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:12:47,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:12:47,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:12:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:12:47,320 INFO L87 Difference]: Start difference. First operand 226 states and 350 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:47,546 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2021-12-07 01:12:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:12:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 126 [2021-12-07 01:12:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:47,549 INFO L225 Difference]: With dead ends: 262 [2021-12-07 01:12:47,549 INFO L226 Difference]: Without dead ends: 250 [2021-12-07 01:12:47,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:12:47,550 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 53 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:47,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 253 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:12:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-07 01:12:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 227. [2021-12-07 01:12:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 213 states have (on average 1.5258215962441315) internal successors, (325), 216 states have internal predecessors, (325), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-07 01:12:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 351 transitions. [2021-12-07 01:12:47,589 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 351 transitions. Word has length 126 [2021-12-07 01:12:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:47,589 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 351 transitions. [2021-12-07 01:12:47,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:12:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 351 transitions. [2021-12-07 01:12:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 01:12:47,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:47,590 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:12:47,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-07 01:12:47,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:47,792 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:12:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash 622344689, now seen corresponding path program 1 times [2021-12-07 01:12:47,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622628089] [2021-12-07 01:12:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:12:47,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:47,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:47,797 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:47,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-07 01:12:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:12:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-07 01:12:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:12:55,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:13:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:13:10,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:13:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622628089] [2021-12-07 01:13:10,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622628089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:13:10,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:13:10,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-12-07 01:13:10,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567732809] [2021-12-07 01:13:10,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:13:10,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-07 01:13:10,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:13:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-07 01:13:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2021-12-07 01:13:10,182 INFO L87 Difference]: Start difference. First operand 227 states and 351 transitions. Second operand has 64 states, 64 states have (on average 3.0) internal successors, (192), 62 states have internal predecessors, (192), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:15:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:15:32,663 INFO L93 Difference]: Finished difference Result 602 states and 890 transitions. [2021-12-07 01:15:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-07 01:15:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.0) internal successors, (192), 62 states have internal predecessors, (192), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 126 [2021-12-07 01:15:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:15:32,668 INFO L225 Difference]: With dead ends: 602 [2021-12-07 01:15:32,669 INFO L226 Difference]: Without dead ends: 587 [2021-12-07 01:15:32,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10219 ImplicationChecksByTransitivity, 121.1s TimeCoverageRelationStatistics Valid=8299, Invalid=26483, Unknown=0, NotChecked=0, Total=34782 [2021-12-07 01:15:32,673 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 2332 mSDsluCounter, 5110 mSDsCounter, 0 mSdLazyCounter, 7544 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2332 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 8907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 7544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:15:32,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2332 Valid, 5267 Invalid, 8907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1363 Valid, 7544 Invalid, 0 Unknown, 0 Unchecked, 37.4s Time] [2021-12-07 01:15:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-12-07 01:15:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 229. [2021-12-07 01:15:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 215 states have (on average 1.5255813953488373) internal successors, (328), 217 states have internal predecessors, (328), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-07 01:15:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 354 transitions. [2021-12-07 01:15:32,712 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 354 transitions. Word has length 126 [2021-12-07 01:15:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:15:32,713 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 354 transitions. [2021-12-07 01:15:32,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.0) internal successors, (192), 62 states have internal predecessors, (192), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:15:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 354 transitions. [2021-12-07 01:15:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-07 01:15:32,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:15:32,714 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:15:32,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-07 01:15:32,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:15:32,915 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:15:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:15:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1341851559, now seen corresponding path program 1 times [2021-12-07 01:15:32,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:15:32,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137024507] [2021-12-07 01:15:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:15:32,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:15:32,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:15:32,917 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:15:32,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 01:15:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:15:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:15:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2021-12-07 01:15:33,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:15:33,223 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:15:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137024507] [2021-12-07 01:15:33,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137024507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:15:33,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:15:33,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:15:33,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735222643] [2021-12-07 01:15:33,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:15:33,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:15:33,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:15:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:15:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:15:33,225 INFO L87 Difference]: Start difference. First operand 229 states and 354 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:15:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:15:33,389 INFO L93 Difference]: Finished difference Result 244 states and 369 transitions. [2021-12-07 01:15:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:15:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 127 [2021-12-07 01:15:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:15:33,391 INFO L225 Difference]: With dead ends: 244 [2021-12-07 01:15:33,391 INFO L226 Difference]: Without dead ends: 239 [2021-12-07 01:15:33,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:15:33,392 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:15:33,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 238 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:15:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-07 01:15:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2021-12-07 01:15:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 222 states have (on average 1.509009009009009) internal successors, (335), 224 states have internal predecessors, (335), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-07 01:15:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 361 transitions. [2021-12-07 01:15:33,417 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 361 transitions. Word has length 127 [2021-12-07 01:15:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:15:33,417 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 361 transitions. [2021-12-07 01:15:33,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:15:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 361 transitions. [2021-12-07 01:15:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-07 01:15:33,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:15:33,418 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:15:33,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-07 01:15:33,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:15:33,619 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:15:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:15:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1806024394, now seen corresponding path program 1 times [2021-12-07 01:15:33,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:15:33,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075060170] [2021-12-07 01:15:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:15:33,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:15:33,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:15:33,622 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:15:33,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-07 01:15:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:33,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 01:15:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:15:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:15:42,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:15:44,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:15:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075060170] [2021-12-07 01:15:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075060170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:15:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [310954326] [2021-12-07 01:15:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:15:44,226 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:15:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:15:44,227 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:15:44,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-07 01:15:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-07 01:15:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:15:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:15:47,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:15:50,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [310954326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:15:51,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:15:51,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 38 [2021-12-07 01:15:51,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468527995] [2021-12-07 01:15:51,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:15:51,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 01:15:51,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:15:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 01:15:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2185, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:15:51,001 INFO L87 Difference]: Start difference. First operand 236 states and 361 transitions. Second operand has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 37 states have internal predecessors, (115), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:16:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:16:14,420 INFO L93 Difference]: Finished difference Result 397 states and 549 transitions. [2021-12-07 01:16:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:16:14,421 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 37 states have internal predecessors, (115), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 128 [2021-12-07 01:16:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:16:14,424 INFO L225 Difference]: With dead ends: 397 [2021-12-07 01:16:14,424 INFO L226 Difference]: Without dead ends: 385 [2021-12-07 01:16:14,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=184, Invalid=2366, Unknown=0, NotChecked=0, Total=2550 [2021-12-07 01:16:14,426 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 160 mSDsluCounter, 3813 mSDsCounter, 0 mSdLazyCounter, 5311 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 3952 SdHoareTripleChecker+Invalid, 5350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:16:14,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 3952 Invalid, 5350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5311 Invalid, 0 Unknown, 38 Unchecked, 22.7s Time] [2021-12-07 01:16:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-07 01:16:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 249. [2021-12-07 01:16:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 232 states have (on average 1.4956896551724137) internal successors, (347), 234 states have internal predecessors, (347), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2021-12-07 01:16:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 388 transitions. [2021-12-07 01:16:14,459 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 388 transitions. Word has length 128 [2021-12-07 01:16:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:16:14,459 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 388 transitions. [2021-12-07 01:16:14,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 37 states have internal predecessors, (115), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:16:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 388 transitions. [2021-12-07 01:16:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-07 01:16:14,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:16:14,461 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:16:14,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-07 01:16:14,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-07 01:16:14,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:16:14,862 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:16:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:16:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash 526160716, now seen corresponding path program 1 times [2021-12-07 01:16:14,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:16:14,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780376455] [2021-12-07 01:16:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:16:14,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:16:14,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:16:14,871 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:16:14,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-07 01:16:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:16:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 01:16:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:16:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:16:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:16:25,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:16:25,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780376455] [2021-12-07 01:16:25,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780376455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:16:25,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2021274133] [2021-12-07 01:16:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:16:25,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:16:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:16:25,097 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:16:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-07 01:16:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:16:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:16:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:16:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:16:26,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:16:30,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2021274133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:16:30,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:16:30,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-12-07 01:16:30,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147339617] [2021-12-07 01:16:30,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:16:30,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 01:16:30,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:16:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 01:16:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 01:16:30,430 INFO L87 Difference]: Start difference. First operand 249 states and 388 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:16:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:16:54,927 INFO L93 Difference]: Finished difference Result 410 states and 564 transitions. [2021-12-07 01:16:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:16:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 128 [2021-12-07 01:16:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:16:54,930 INFO L225 Difference]: With dead ends: 410 [2021-12-07 01:16:54,930 INFO L226 Difference]: Without dead ends: 398 [2021-12-07 01:16:54,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=149, Invalid=2013, Unknown=0, NotChecked=0, Total=2162 [2021-12-07 01:16:54,932 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 4129 mSDsCounter, 0 mSdLazyCounter, 5441 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 4269 SdHoareTripleChecker+Invalid, 6005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:16:54,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 4269 Invalid, 6005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5441 Invalid, 0 Unknown, 563 Unchecked, 23.7s Time] [2021-12-07 01:16:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-07 01:16:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 249. [2021-12-07 01:16:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 232 states have (on average 1.4956896551724137) internal successors, (347), 234 states have internal predecessors, (347), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2021-12-07 01:16:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 388 transitions. [2021-12-07 01:16:54,967 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 388 transitions. Word has length 128 [2021-12-07 01:16:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:16:54,967 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 388 transitions. [2021-12-07 01:16:54,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:16:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 388 transitions. [2021-12-07 01:16:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:16:54,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:16:54,969 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:16:54,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-12-07 01:16:55,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-07 01:16:55,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:16:55,371 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:16:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:16:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1791541869, now seen corresponding path program 2 times [2021-12-07 01:16:55,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:16:55,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582667945] [2021-12-07 01:16:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:16:55,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:16:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:16:55,374 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:16:55,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-07 01:16:55,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:16:55,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:16:55,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-07 01:16:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:17:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:17:03,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:17:05,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:17:05,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582667945] [2021-12-07 01:17:05,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582667945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:17:05,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62599821] [2021-12-07 01:17:05,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:17:05,542 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:17:05,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:17:05,545 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:17:05,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-07 01:17:05,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:17:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:17:05,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-07 01:17:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:17:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:17:07,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:17:08,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62599821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:17:08,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:17:08,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-12-07 01:17:08,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199758100] [2021-12-07 01:17:08,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:17:08,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 01:17:08,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:17:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 01:17:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1462, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 01:17:08,211 INFO L87 Difference]: Start difference. First operand 249 states and 388 transitions. Second operand has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:17:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:17:33,262 INFO L93 Difference]: Finished difference Result 392 states and 542 transitions. [2021-12-07 01:17:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 01:17:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 129 [2021-12-07 01:17:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:17:33,266 INFO L225 Difference]: With dead ends: 392 [2021-12-07 01:17:33,266 INFO L226 Difference]: Without dead ends: 378 [2021-12-07 01:17:33,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2021-12-07 01:17:33,268 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 135 mSDsluCounter, 4049 mSDsCounter, 0 mSdLazyCounter, 5479 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 4186 SdHoareTripleChecker+Invalid, 5850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:17:33,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 4186 Invalid, 5850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5479 Invalid, 0 Unknown, 370 Unchecked, 24.4s Time] [2021-12-07 01:17:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-07 01:17:33,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 251. [2021-12-07 01:17:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 234 states have (on average 1.4914529914529915) internal successors, (349), 236 states have internal predecessors, (349), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2021-12-07 01:17:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 390 transitions. [2021-12-07 01:17:33,303 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 390 transitions. Word has length 129 [2021-12-07 01:17:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:17:33,304 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 390 transitions. [2021-12-07 01:17:33,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:17:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 390 transitions. [2021-12-07 01:17:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:17:33,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:17:33,305 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:17:33,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-07 01:17:33,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-12-07 01:17:33,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:17:33,706 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:17:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:17:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash 770473515, now seen corresponding path program 1 times [2021-12-07 01:17:33,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:17:33,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079081344] [2021-12-07 01:17:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:17:33,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:17:33,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:17:33,711 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:17:33,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-07 01:17:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:17:33,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:17:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:17:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:17:41,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:17:45,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:17:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079081344] [2021-12-07 01:17:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079081344] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:17:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [169291550] [2021-12-07 01:17:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:17:45,709 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:17:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:17:45,710 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:17:45,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-12-07 01:17:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:17:45,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:17:45,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:17:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:17:47,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:17:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [169291550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:17:49,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:17:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-12-07 01:17:49,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837486654] [2021-12-07 01:17:49,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:17:49,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 01:17:49,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:17:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 01:17:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:17:49,183 INFO L87 Difference]: Start difference. First operand 251 states and 390 transitions. Second operand has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:18:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:18:14,411 INFO L93 Difference]: Finished difference Result 412 states and 564 transitions. [2021-12-07 01:18:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 01:18:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 129 [2021-12-07 01:18:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:18:14,415 INFO L225 Difference]: With dead ends: 412 [2021-12-07 01:18:14,415 INFO L226 Difference]: Without dead ends: 398 [2021-12-07 01:18:14,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 250 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 01:18:14,416 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 192 mSDsluCounter, 4458 mSDsCounter, 0 mSdLazyCounter, 5442 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 4609 SdHoareTripleChecker+Invalid, 6085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:18:14,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 4609 Invalid, 6085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5442 Invalid, 0 Unknown, 642 Unchecked, 24.2s Time] [2021-12-07 01:18:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-07 01:18:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 249. [2021-12-07 01:18:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 232 states have (on average 1.4913793103448276) internal successors, (346), 234 states have internal predecessors, (346), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2021-12-07 01:18:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 387 transitions. [2021-12-07 01:18:14,452 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 387 transitions. Word has length 129 [2021-12-07 01:18:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:18:14,453 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 387 transitions. [2021-12-07 01:18:14,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 34 states have internal predecessors, (109), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:18:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 387 transitions. [2021-12-07 01:18:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-07 01:18:14,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:18:14,454 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:18:14,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-12-07 01:18:14,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-07 01:18:14,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:18:14,855 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:18:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:18:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 755502598, now seen corresponding path program 1 times [2021-12-07 01:18:14,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:18:14,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615278898] [2021-12-07 01:18:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:18:14,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:18:14,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:18:14,860 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:18:14,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-07 01:18:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:18:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-07 01:18:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:18:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:18:47,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:19:24,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:19:24,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615278898] [2021-12-07 01:19:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615278898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:19:24,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1683981751] [2021-12-07 01:19:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:19:24,906 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:19:24,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:19:24,907 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:19:24,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01b598bd-1484-4b46-82f3-6fd9246a7b1e/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-12-07 01:19:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:19:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-07 01:19:25,124 INFO L286 TraceCheckSpWp]: Computing forward predicates...