./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_5a.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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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 8e0d39156332f28801fd53c29750c6296a22718f3bae9c3fa206403e85d3b017 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:05:19,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:05:19,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:05:19,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:05:19,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:05:19,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:05:19,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:05:19,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:05:19,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:05:19,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:05:19,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:05:19,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:05:19,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:05:19,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:05:19,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:05:19,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:05:19,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:05:19,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:05:19,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:05:19,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:05:19,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:05:19,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:05:19,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:05:19,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:05:19,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:05:19,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:05:19,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:05:19,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:05:19,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:05:19,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:05:19,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:05:19,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:05:19,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:05:19,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:05:19,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:05:19,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:05:19,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:05:19,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:05:19,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:05:19,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:05:19,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:05:19,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:05:19,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:05:19,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:05:19,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:05:19,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:05:19,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:05:19,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:05:19,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:05:19,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:05:19,772 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:05:19,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:05:19,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:05:19,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:05:19,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:05:19,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:05:19,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:05:19,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:05:19,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:05:19,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:05:19,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:05:19,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:05:19,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:05:19,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:05:19,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:05:19,774 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:05:19,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:05:19,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:05:19,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:05:19,775 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e0d39156332f28801fd53c29750c6296a22718f3bae9c3fa206403e85d3b017 [2021-12-06 19:05:19,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:05:19,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:05:19,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:05:19,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:05:19,985 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:05:19,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c [2021-12-06 19:05:20,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/b2485da22/23d60d6361014653a6c0266c7b356804/FLAGa69bcc501 [2021-12-06 19:05:20,400 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:05:20,400 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c [2021-12-06 19:05:20,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/b2485da22/23d60d6361014653a6c0266c7b356804/FLAGa69bcc501 [2021-12-06 19:05:20,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/b2485da22/23d60d6361014653a6c0266c7b356804 [2021-12-06 19:05:20,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:05:20,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:05:20,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:05:20,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:05:20,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:05:20,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63605072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20, skipping insertion in model container [2021-12-06 19:05:20,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:05:20,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:05:20,588 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[1995,2008] [2021-12-06 19:05:20,591 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[2364,2377] [2021-12-06 19:05:20,625 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:05:20,632 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:05:20,644 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[1995,2008] [2021-12-06 19:05:20,645 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[2364,2377] [2021-12-06 19:05:20,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:05:20,683 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:05:20,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20 WrapperNode [2021-12-06 19:05:20,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:05:20,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:05:20,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:05:20,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:05:20,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,719 INFO L137 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2021-12-06 19:05:20,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:05:20,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:05:20,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:05:20,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:05:20,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:05:20,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:05:20,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:05:20,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:05:20,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (1/1) ... [2021-12-06 19:05:20,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:05:20,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:20,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:05:20,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:05:20,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:05:20,817 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 19:05:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 19:05:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:05:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:05:20,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:05:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:05:20,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:05:20,880 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:05:20,882 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:05:21,062 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:05:21,068 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:05:21,068 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:05:21,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:21 BoogieIcfgContainer [2021-12-06 19:05:21,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:05:21,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:05:21,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:05:21,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:05:21,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:05:20" (1/3) ... [2021-12-06 19:05:21,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a365a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:21, skipping insertion in model container [2021-12-06 19:05:21,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:20" (2/3) ... [2021-12-06 19:05:21,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a365a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:21, skipping insertion in model container [2021-12-06 19:05:21,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:21" (3/3) ... [2021-12-06 19:05:21,078 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_5a.c.cil.c [2021-12-06 19:05:21,083 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:05:21,083 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:05:21,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:05:21,130 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 [2021-12-06 19:05:21,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:05:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 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) [2021-12-06 19:05:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:05:21,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:21,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:21,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 19:05:21,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:21,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538909627] [2021-12-06 19:05:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:21,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:05:21,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:21,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538909627] [2021-12-06 19:05:21,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538909627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:21,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:21,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:05:21,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112950216] [2021-12-06 19:05:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:21,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:05:21,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:21,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:05:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:05:21,328 INFO L87 Difference]: Start difference. First operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 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) [2021-12-06 19:05:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:21,356 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2021-12-06 19:05:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:05:21,358 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 [2021-12-06 19:05:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:21,366 INFO L225 Difference]: With dead ends: 117 [2021-12-06 19:05:21,366 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 19:05:21,370 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 [2021-12-06 19:05:21,373 INFO L933 BasicCegarLoop]: 82 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, 82 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 [2021-12-06 19:05:21,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 19:05:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 19:05:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 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) [2021-12-06 19:05:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2021-12-06 19:05:21,414 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 7 [2021-12-06 19:05:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:21,414 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2021-12-06 19:05:21,414 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) [2021-12-06 19:05:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2021-12-06 19:05:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:05:21,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:21,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:21,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:05:21,416 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 19:05:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30517470] [2021-12-06 19:05:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:21,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:05:21,433 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:05:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:05:21,452 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:05:21,452 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 19:05:21,453 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 19:05:21,455 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 19:05:21,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:05:21,457 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-06 19:05:21,459 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:05:21,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:05:21 BoogieIcfgContainer [2021-12-06 19:05:21,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:05:21,475 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:05:21,475 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:05:21,476 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:05:21,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:21" (3/4) ... [2021-12-06 19:05:21,478 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 19:05:21,478 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:05:21,479 INFO L158 Benchmark]: Toolchain (without parser) took 1055.74ms. Allocated memory is still 86.0MB. Free memory was 47.6MB in the beginning and 47.9MB in the end (delta: -278.9kB). Peak memory consumption was 291.6kB. Max. memory is 16.1GB. [2021-12-06 19:05:21,479 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:05:21,479 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.48ms. Allocated memory is still 86.0MB. Free memory was 47.4MB in the beginning and 58.8MB in the end (delta: -11.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 19:05:21,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.48ms. Allocated memory is still 86.0MB. Free memory was 58.8MB in the beginning and 56.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:05:21,480 INFO L158 Benchmark]: Boogie Preprocessor took 26.94ms. Allocated memory is still 86.0MB. Free memory was 56.7MB in the beginning and 55.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:05:21,481 INFO L158 Benchmark]: RCFGBuilder took 322.08ms. Allocated memory is still 86.0MB. Free memory was 55.2MB in the beginning and 41.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 19:05:21,481 INFO L158 Benchmark]: TraceAbstraction took 403.53ms. Allocated memory is still 86.0MB. Free memory was 41.1MB in the beginning and 48.3MB in the end (delta: -7.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:05:21,481 INFO L158 Benchmark]: Witness Printer took 2.84ms. Allocated memory is still 86.0MB. Free memory was 48.3MB in the beginning and 47.9MB in the end (delta: 406.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:05:21,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.48ms. Allocated memory is still 86.0MB. Free memory was 47.4MB in the beginning and 58.8MB in the end (delta: -11.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.48ms. Allocated memory is still 86.0MB. Free memory was 58.8MB in the beginning and 56.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.94ms. Allocated memory is still 86.0MB. Free memory was 56.7MB in the beginning and 55.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 322.08ms. Allocated memory is still 86.0MB. Free memory was 55.2MB in the beginning and 41.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 403.53ms. Allocated memory is still 86.0MB. Free memory was 41.1MB in the beginning and 48.3MB in the end (delta: -7.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.84ms. Allocated memory is still 86.0MB. Free memory was 48.3MB in the beginning and 47.9MB in the end (delta: 406.1kB). 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: [L322] COND TRUE __VERIFIER_nondet_int() [L323] 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, 61 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, 82 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, 82 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=61occurred 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 [2021-12-06 19:05:21,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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 8e0d39156332f28801fd53c29750c6296a22718f3bae9c3fa206403e85d3b017 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:05:23,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:05:23,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:05:23,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:05:23,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:05:23,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:05:23,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:05:23,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:05:23,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:05:23,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:05:23,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:05:23,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:05:23,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:05:23,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:05:23,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:05:23,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:05:23,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:05:23,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:05:23,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:05:23,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:05:23,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:05:23,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:05:23,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:05:23,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:05:23,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:05:23,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:05:23,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:05:23,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:05:23,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:05:23,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:05:23,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:05:23,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:05:23,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:05:23,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:05:23,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:05:23,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:05:23,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:05:23,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:05:23,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:05:23,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:05:23,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:05:23,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 19:05:23,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:05:23,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:05:23,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:05:23,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:05:23,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:05:23,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:05:23,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:05:23,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:05:23,309 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:05:23,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:05:23,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:05:23,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:05:23,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:05:23,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:05:23,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:05:23,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:05:23,310 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:05:23,311 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:05:23,311 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:05:23,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:05:23,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:05:23,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:05:23,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:05:23,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:05:23,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:05:23,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:05:23,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:05:23,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:05:23,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:05:23,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:05:23,313 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:05:23,313 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:05:23,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:05:23,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:05:23,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:05:23,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:05:23,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:05:23,315 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e0d39156332f28801fd53c29750c6296a22718f3bae9c3fa206403e85d3b017 [2021-12-06 19:05:23,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:05:23,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:05:23,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:05:23,571 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:05:23,572 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:05:23,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c [2021-12-06 19:05:23,620 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/38031997d/b1e7d07c418640a49e5dc20d1a2c9f0c/FLAG7400e3c13 [2021-12-06 19:05:24,033 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:05:24,034 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c [2021-12-06 19:05:24,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/38031997d/b1e7d07c418640a49e5dc20d1a2c9f0c/FLAG7400e3c13 [2021-12-06 19:05:24,051 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/data/38031997d/b1e7d07c418640a49e5dc20d1a2c9f0c [2021-12-06 19:05:24,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:05:24,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:05:24,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:05:24,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:05:24,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:05:24,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b63aaa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24, skipping insertion in model container [2021-12-06 19:05:24,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:05:24,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:05:24,199 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[1995,2008] [2021-12-06 19:05:24,203 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[2364,2377] [2021-12-06 19:05:24,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:05:24,253 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:05:24,265 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[1995,2008] [2021-12-06 19:05:24,266 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_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/sv-benchmarks/c/combinations/square_8+soft_float_5a.c.cil.c[2364,2377] [2021-12-06 19:05:24,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:05:24,297 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:05:24,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24 WrapperNode [2021-12-06 19:05:24,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:05:24,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:05:24,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:05:24,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:05:24,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,331 INFO L137 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2021-12-06 19:05:24,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:05:24,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:05:24,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:05:24,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:05:24,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:05:24,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:05:24,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:05:24,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:05:24,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (1/1) ... [2021-12-06 19:05:24,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:05:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:24,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:05:24,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:05:24,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:05:24,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 19:05:24,414 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-06 19:05:24,414 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-06 19:05:24,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:05:24,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:05:24,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:05:24,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:05:24,480 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:05:24,481 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:05:26,828 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:05:26,833 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:05:26,834 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:05:26,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:26 BoogieIcfgContainer [2021-12-06 19:05:26,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:05:26,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:05:26,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:05:26,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:05:26,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:05:24" (1/3) ... [2021-12-06 19:05:26,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb7e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:26, skipping insertion in model container [2021-12-06 19:05:26,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:24" (2/3) ... [2021-12-06 19:05:26,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb7e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:26, skipping insertion in model container [2021-12-06 19:05:26,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:26" (3/3) ... [2021-12-06 19:05:26,845 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_5a.c.cil.c [2021-12-06 19:05:26,848 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:05:26,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:05:26,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:05:26,886 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 [2021-12-06 19:05:26,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:05:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 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) [2021-12-06 19:05:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:05:26,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:26,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:26,902 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-06 19:05:26,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:05:26,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718327548] [2021-12-06 19:05:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:26,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:05:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:05:26,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:05:26,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:05:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:27,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 19:05:27,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:05:27,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:27,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:05:27,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718327548] [2021-12-06 19:05:27,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718327548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:27,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:27,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:05:27,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699673831] [2021-12-06 19:05:27,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:27,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:05:27,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:05:27,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:05:27,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:05:27,455 INFO L87 Difference]: Start difference. First operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 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) [2021-12-06 19:05:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:27,474 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2021-12-06 19:05:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:05:27,476 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 [2021-12-06 19:05:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:27,481 INFO L225 Difference]: With dead ends: 117 [2021-12-06 19:05:27,481 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 19:05:27,484 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 [2021-12-06 19:05:27,487 INFO L933 BasicCegarLoop]: 82 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, 82 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 [2021-12-06 19:05:27,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 19:05:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 19:05:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 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) [2021-12-06 19:05:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2021-12-06 19:05:27,515 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 7 [2021-12-06 19:05:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:27,515 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2021-12-06 19:05:27,516 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) [2021-12-06 19:05:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2021-12-06 19:05:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:05:27,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:27,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:27,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:05:27,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:05:27,719 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-06 19:05:27,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:05:27,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602089723] [2021-12-06 19:05:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:27,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:05:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:05:27,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:05:27,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:05:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:05:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:52,505 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 [2021-12-06 19:06:42,531 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 [2021-12-06 19:06:44,574 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 [2021-12-06 19:06:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:06:44,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:44,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602089723] [2021-12-06 19:06:44,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602089723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:44,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:44,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:06:44,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916934573] [2021-12-06 19:06:44,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:44,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:06:44,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:44,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:06:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-06 19:06:44,578 INFO L87 Difference]: Start difference. First operand 52 states and 71 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) [2021-12-06 19:06:46,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 19:06:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:47,072 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-12-06 19:06:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:06:47,073 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 [2021-12-06 19:06:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:47,074 INFO L225 Difference]: With dead ends: 52 [2021-12-06 19:06:47,075 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 19:06:47,075 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 [2021-12-06 19:06:47,076 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 67 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:47,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 178 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 137 Unchecked, 2.4s Time] [2021-12-06 19:06:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 19:06:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-06 19:06:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 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) [2021-12-06 19:06:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2021-12-06 19:06:47,084 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 7 [2021-12-06 19:06:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:47,084 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2021-12-06 19:06:47,084 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) [2021-12-06 19:06:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2021-12-06 19:06:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 19:06:47,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:47,086 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, 1] [2021-12-06 19:06:47,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-06 19:06:47,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:47,289 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:47,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1370969986, now seen corresponding path program 1 times [2021-12-06 19:06:47,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:47,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566548471] [2021-12-06 19:06:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:47,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:47,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:47,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:06:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:06:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:47,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:47,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566548471] [2021-12-06 19:06:47,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566548471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:47,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:47,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:06:47,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762531078] [2021-12-06 19:06:47,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:06:47,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:06:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:06:47,519 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-12-06 19:06:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:47,736 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2021-12-06 19:06:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:06:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 43 [2021-12-06 19:06:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:47,740 INFO L225 Difference]: With dead ends: 104 [2021-12-06 19:06:47,740 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 19:06:47,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:06:47,742 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 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 [2021-12-06 19:06:47,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:06:47,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 19:06:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-12-06 19:06:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 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) [2021-12-06 19:06:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2021-12-06 19:06:47,753 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 43 [2021-12-06 19:06:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:47,753 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2021-12-06 19:06:47,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-12-06 19:06:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2021-12-06 19:06:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:06:47,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:47,756 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] [2021-12-06 19:06:47,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 19:06:47,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:47,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash -14997806, now seen corresponding path program 1 times [2021-12-06 19:06:47,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:47,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691847423] [2021-12-06 19:06:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:47,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:47,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:47,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:47,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:06:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:06:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:48,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:48,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:48,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691847423] [2021-12-06 19:06:48,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691847423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:48,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:48,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:06:48,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300680777] [2021-12-06 19:06:48,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:48,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:06:48,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:06:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:06:48,261 INFO L87 Difference]: Start difference. First operand 52 states and 72 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) [2021-12-06 19:06:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:48,450 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2021-12-06 19:06:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:06:48,451 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 [2021-12-06 19:06:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:48,453 INFO L225 Difference]: With dead ends: 108 [2021-12-06 19:06:48,453 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 19:06:48,454 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 [2021-12-06 19:06:48,455 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 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 [2021-12-06 19:06:48,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:06:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 19:06:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-12-06 19:06:48,463 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) [2021-12-06 19:06:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-06 19:06:48,465 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2021-12-06 19:06:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-06 19:06:48,465 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) [2021-12-06 19:06:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-06 19:06:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 19:06:48,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:48,467 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] [2021-12-06 19:06:48,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 19:06:48,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:48,670 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1638472845, now seen corresponding path program 1 times [2021-12-06 19:06:48,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:48,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645348813] [2021-12-06 19:06:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:48,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:48,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:48,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:48,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:06:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:48,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:06:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:48,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:48,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:48,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645348813] [2021-12-06 19:06:48,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645348813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:48,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:48,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:06:48,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122514218] [2021-12-06 19:06:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:48,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:06:48,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:06:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:06:48,912 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-12-06 19:06:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:49,147 INFO L93 Difference]: Finished difference Result 117 states and 165 transitions. [2021-12-06 19:06:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:06:49,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 [2021-12-06 19:06:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:49,149 INFO L225 Difference]: With dead ends: 117 [2021-12-06 19:06:49,149 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 19:06:49,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:06:49,150 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 153 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 [2021-12-06 19:06:49,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 153 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:06:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 19:06:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-12-06 19:06:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 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) [2021-12-06 19:06:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2021-12-06 19:06:49,159 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 47 [2021-12-06 19:06:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:49,159 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2021-12-06 19:06:49,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-12-06 19:06:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2021-12-06 19:06:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 19:06:49,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:49,161 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, 1] [2021-12-06 19:06:49,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-06 19:06:49,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:49,363 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:49,365 INFO L85 PathProgramCache]: Analyzing trace with hash 388661875, now seen corresponding path program 1 times [2021-12-06 19:06:49,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:49,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611859147] [2021-12-06 19:06:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:49,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:49,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:49,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:06:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:06:49,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:49,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:49,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:49,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611859147] [2021-12-06 19:06:49,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611859147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:49,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:49,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:06:49,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557039001] [2021-12-06 19:06:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:49,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:06:49,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:06:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:06:49,649 INFO L87 Difference]: Start difference. First operand 58 states and 80 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), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:06:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:50,041 INFO L93 Difference]: Finished difference Result 125 states and 176 transitions. [2021-12-06 19:06:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:06:50,043 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), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-12-06 19:06:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:50,044 INFO L225 Difference]: With dead ends: 125 [2021-12-06 19:06:50,044 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 19:06:50,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:06:50,046 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 202 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 [2021-12-06 19:06:50,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 202 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:06:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 19:06:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-12-06 19:06:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.38) internal successors, (69), 51 states have internal predecessors, (69), 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) [2021-12-06 19:06:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2021-12-06 19:06:50,056 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 48 [2021-12-06 19:06:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:50,056 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-12-06 19:06:50,056 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), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:06:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2021-12-06 19:06:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 19:06:50,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:50,058 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, 1] [2021-12-06 19:06:50,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 19:06:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:50,259 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 933318672, now seen corresponding path program 1 times [2021-12-06 19:06:50,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:50,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39351827] [2021-12-06 19:06:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:50,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:50,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:50,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:06:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:06:50,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:50,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:06:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:06:51,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:51,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39351827] [2021-12-06 19:06:51,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39351827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:06:51,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:06:51,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 19:06:51,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835693881] [2021-12-06 19:06:51,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:06:51,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:06:51,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:06:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:06:51,025 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2021-12-06 19:06:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:51,677 INFO L93 Difference]: Finished difference Result 146 states and 208 transitions. [2021-12-06 19:06:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:06:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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 49 [2021-12-06 19:06:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:51,680 INFO L225 Difference]: With dead ends: 146 [2021-12-06 19:06:51,680 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 19:06:51,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:06:51,681 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 42 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:51,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 330 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:06:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 19:06:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2021-12-06 19:06:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 59 states have internal predecessors, (82), 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) [2021-12-06 19:06:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2021-12-06 19:06:51,692 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 49 [2021-12-06 19:06:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:51,692 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2021-12-06 19:06:51,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2021-12-06 19:06:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2021-12-06 19:06:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:06:51,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:51,696 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, 1] [2021-12-06 19:06:51,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 19:06:51,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:51,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1187730481, now seen corresponding path program 1 times [2021-12-06 19:06:51,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:51,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160454806] [2021-12-06 19:06:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:51,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:51,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:51,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 19:06:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:06:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:52,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:06:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:06:52,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160454806] [2021-12-06 19:06:52,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160454806] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:06:52,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:06:52,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 19:06:52,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238603562] [2021-12-06 19:06:52,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:06:52,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:06:52,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:06:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:06:52,753 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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) [2021-12-06 19:06:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:53,684 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2021-12-06 19:06:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:06:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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 51 [2021-12-06 19:06:53,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:53,686 INFO L225 Difference]: With dead ends: 164 [2021-12-06 19:06:53,686 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 19:06:53,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:06:53,688 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 134 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:53,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 334 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:06:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 19:06:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 71. [2021-12-06 19:06:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.435483870967742) internal successors, (89), 63 states have internal predecessors, (89), 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) [2021-12-06 19:06:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 102 transitions. [2021-12-06 19:06:53,699 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 102 transitions. Word has length 51 [2021-12-06 19:06:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:53,699 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 102 transitions. [2021-12-06 19:06:53,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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) [2021-12-06 19:06:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 102 transitions. [2021-12-06 19:06:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 19:06:53,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:53,701 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, 1] [2021-12-06 19:06:53,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-06 19:06:53,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:53,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -763243182, now seen corresponding path program 2 times [2021-12-06 19:06:53,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:53,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490616836] [2021-12-06 19:06:53,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:06:53,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:53,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:53,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 19:06:53,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:06:53,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:06:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:06:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 19:06:54,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:54,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:54,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490616836] [2021-12-06 19:06:54,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490616836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:54,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:54,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:06:54,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247195016] [2021-12-06 19:06:54,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:54,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:06:54,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:06:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:06:54,204 INFO L87 Difference]: Start difference. First operand 71 states and 102 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-12-06 19:06:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:54,462 INFO L93 Difference]: Finished difference Result 119 states and 169 transitions. [2021-12-06 19:06:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:06:54,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 58 [2021-12-06 19:06:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:54,464 INFO L225 Difference]: With dead ends: 119 [2021-12-06 19:06:54,464 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 19:06:54,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:06:54,465 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 34 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:54,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 340 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:06:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 19:06:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-12-06 19:06:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 75 states have internal predecessors, (101), 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) [2021-12-06 19:06:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2021-12-06 19:06:54,475 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 58 [2021-12-06 19:06:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:54,475 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2021-12-06 19:06:54,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-12-06 19:06:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2021-12-06 19:06:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 19:06:54,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:54,476 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, 1] [2021-12-06 19:06:54,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 19:06:54,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:54,678 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:54,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1156270192, now seen corresponding path program 1 times [2021-12-06 19:06:54,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:54,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766516319] [2021-12-06 19:06:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:54,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:54,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:54,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:54,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 19:06:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:06:54,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:55,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:06:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:06:56,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:06:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766516319] [2021-12-06 19:06:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766516319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:06:56,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:06:56,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 19:06:56,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948696941] [2021-12-06 19:06:56,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:06:56,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:06:56,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:06:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:06:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:06:56,141 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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) [2021-12-06 19:06:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:58,657 INFO L93 Difference]: Finished difference Result 231 states and 330 transitions. [2021-12-06 19:06:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:06:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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 58 [2021-12-06 19:06:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:58,659 INFO L225 Difference]: With dead ends: 231 [2021-12-06 19:06:58,659 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 19:06:58,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:06:58,661 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 204 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:58,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 592 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:06:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 19:06:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2021-12-06 19:06:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 89 states have internal predecessors, (124), 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) [2021-12-06 19:06:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2021-12-06 19:06:58,686 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 58 [2021-12-06 19:06:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:58,686 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2021-12-06 19:06:58,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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) [2021-12-06 19:06:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2021-12-06 19:06:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:06:58,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:58,688 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, 1] [2021-12-06 19:06:58,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 19:06:58,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:06:58,890 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1365284847, now seen corresponding path program 1 times [2021-12-06 19:06:58,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:06:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926869203] [2021-12-06 19:06:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:58,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:06:58,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:06:58,896 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:06:58,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 19:06:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:06:59,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:06:59,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:07:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:07:01,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:07:01,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926869203] [2021-12-06 19:07:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926869203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:07:01,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:07:01,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 19:07:01,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123157793] [2021-12-06 19:07:01,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:07:01,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:07:01,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:07:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:07:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:07:01,043 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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) [2021-12-06 19:07:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:07:03,982 INFO L93 Difference]: Finished difference Result 254 states and 368 transitions. [2021-12-06 19:07:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:07:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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 63 [2021-12-06 19:07:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:07:03,984 INFO L225 Difference]: With dead ends: 254 [2021-12-06 19:07:03,985 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 19:07:03,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=354, Invalid=638, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:07:03,986 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 321 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:07:03,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 664 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:07:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 19:07:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 108. [2021-12-06 19:07:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 97 states have (on average 1.4536082474226804) internal successors, (141), 99 states have internal predecessors, (141), 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) [2021-12-06 19:07:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 159 transitions. [2021-12-06 19:07:04,001 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 159 transitions. Word has length 63 [2021-12-06 19:07:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:04,001 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 159 transitions. [2021-12-06 19:07:04,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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) [2021-12-06 19:07:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 159 transitions. [2021-12-06 19:07:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 19:07:04,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:04,002 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] [2021-12-06 19:07:04,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 19:07:04,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:07:04,204 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1400933040, now seen corresponding path program 2 times [2021-12-06 19:07:04,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:07:04,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959602769] [2021-12-06 19:07:04,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:07:04,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:07:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:07:04,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:07:04,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 19:07:04,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:07:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:07:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:07:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:07:04,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:07:04,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:07:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959602769] [2021-12-06 19:07:04,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959602769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:07:04,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:07:04,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:07:04,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744486836] [2021-12-06 19:07:04,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:07:04,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:07:04,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:07:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:07:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:07:04,397 INFO L87 Difference]: Start difference. First operand 108 states and 159 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-12-06 19:07:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:07:04,416 INFO L93 Difference]: Finished difference Result 131 states and 190 transitions. [2021-12-06 19:07:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:07:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 76 [2021-12-06 19:07:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:07:04,418 INFO L225 Difference]: With dead ends: 131 [2021-12-06 19:07:04,418 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 19:07:04,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:07:04,419 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 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 [2021-12-06 19:07:04,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:07:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 19:07:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-06 19:07:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 97 states have (on average 1.4329896907216495) internal successors, (139), 99 states have internal predecessors, (139), 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) [2021-12-06 19:07:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 157 transitions. [2021-12-06 19:07:04,429 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 157 transitions. Word has length 76 [2021-12-06 19:07:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:04,429 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 157 transitions. [2021-12-06 19:07:04,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-12-06 19:07:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 157 transitions. [2021-12-06 19:07:04,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 19:07:04,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:04,430 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, 1] [2021-12-06 19:07:04,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 19:07:04,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:07:04,632 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:04,633 INFO L85 PathProgramCache]: Analyzing trace with hash 270007180, now seen corresponding path program 1 times [2021-12-06 19:07:04,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:07:04,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509892699] [2021-12-06 19:07:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:04,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:07:04,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:07:04,637 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:07:04,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 19:07:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:07:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:07:04,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:07:05,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:07:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:07:08,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:07:08,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509892699] [2021-12-06 19:07:08,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509892699] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:07:08,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:07:08,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-06 19:07:08,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402675325] [2021-12-06 19:07:08,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:07:08,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:07:08,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:07:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:07:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:07:08,524 INFO L87 Difference]: Start difference. First operand 108 states and 157 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 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) [2021-12-06 19:07:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:07:17,510 INFO L93 Difference]: Finished difference Result 357 states and 514 transitions. [2021-12-06 19:07:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 19:07:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 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 78 [2021-12-06 19:07:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:07:17,514 INFO L225 Difference]: With dead ends: 357 [2021-12-06 19:07:17,514 INFO L226 Difference]: Without dead ends: 257 [2021-12-06 19:07:17,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=729, Invalid=1433, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 19:07:17,516 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 641 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:07:17,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 1552 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 19:07:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-06 19:07:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 134. [2021-12-06 19:07:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 123 states have (on average 1.4796747967479675) internal successors, (182), 125 states have internal predecessors, (182), 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) [2021-12-06 19:07:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 200 transitions. [2021-12-06 19:07:17,534 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 200 transitions. Word has length 78 [2021-12-06 19:07:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:17,534 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 200 transitions. [2021-12-06 19:07:17,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 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) [2021-12-06 19:07:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 200 transitions. [2021-12-06 19:07:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 19:07:17,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:17,535 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, 1] [2021-12-06 19:07:17,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-06 19:07:17,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:07:17,737 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1407699605, now seen corresponding path program 1 times [2021-12-06 19:07:17,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:07:17,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238481618] [2021-12-06 19:07:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:17,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:07:17,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:07:17,742 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:07:17,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 19:07:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:07:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:07:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:07:19,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:07:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:07:23,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:07:23,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238481618] [2021-12-06 19:07:23,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238481618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:07:23,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:07:23,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-12-06 19:07:23,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065837404] [2021-12-06 19:07:23,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:07:23,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:07:23,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:07:23,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:07:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:07:23,105 INFO L87 Difference]: Start difference. First operand 134 states and 200 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 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) [2021-12-06 19:07:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:07:31,891 INFO L93 Difference]: Finished difference Result 358 states and 520 transitions. [2021-12-06 19:07:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 19:07:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 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 89 [2021-12-06 19:07:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:07:31,894 INFO L225 Difference]: With dead ends: 358 [2021-12-06 19:07:31,894 INFO L226 Difference]: Without dead ends: 232 [2021-12-06 19:07:31,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=991, Invalid=2315, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 19:07:31,896 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 702 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:07:31,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 1761 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 19:07:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-06 19:07:31,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 138. [2021-12-06 19:07:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 127 states have (on average 1.4881889763779528) internal successors, (189), 129 states have internal predecessors, (189), 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) [2021-12-06 19:07:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 207 transitions. [2021-12-06 19:07:31,911 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 207 transitions. Word has length 89 [2021-12-06 19:07:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:31,912 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 207 transitions. [2021-12-06 19:07:31,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 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) [2021-12-06 19:07:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 207 transitions. [2021-12-06 19:07:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 19:07:31,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:31,913 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, 1] [2021-12-06 19:07:31,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-06 19:07:32,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:07:32,115 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:32,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1851209972, now seen corresponding path program 2 times [2021-12-06 19:07:32,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:07:32,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193954530] [2021-12-06 19:07:32,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:07:32,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:07:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:07:32,119 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:07:32,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 19:07:32,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:07:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:07:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:07:32,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-12-06 19:07:32,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:07:32,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:07:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193954530] [2021-12-06 19:07:32,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193954530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:07:32,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:07:32,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:07:32,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682235867] [2021-12-06 19:07:32,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:07:32,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:07:32,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:07:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:07:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:07:32,354 INFO L87 Difference]: Start difference. First operand 138 states and 207 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-06 19:07:32,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:07:32,601 INFO L93 Difference]: Finished difference Result 164 states and 242 transitions. [2021-12-06 19:07:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:07:32,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 114 [2021-12-06 19:07:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:07:32,605 INFO L225 Difference]: With dead ends: 164 [2021-12-06 19:07:32,605 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 19:07:32,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:07:32,606 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 60 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:07:32,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 184 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:07:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 19:07:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2021-12-06 19:07:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 134 states have internal predecessors, (195), 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) [2021-12-06 19:07:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 213 transitions. [2021-12-06 19:07:32,625 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 213 transitions. Word has length 114 [2021-12-06 19:07:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:32,625 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 213 transitions. [2021-12-06 19:07:32,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-06 19:07:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 213 transitions. [2021-12-06 19:07:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 19:07:32,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:32,628 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, 1, 1, 1] [2021-12-06 19:07:32,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 19:07:32,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:07:32,829 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:32,831 INFO L85 PathProgramCache]: Analyzing trace with hash -133940046, now seen corresponding path program 1 times [2021-12-06 19:07:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:07:32,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993705659] [2021-12-06 19:07:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:32,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:07:32,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:07:32,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:07:32,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 19:07:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:07:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:07:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:07:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:07:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:07:44,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:07:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993705659] [2021-12-06 19:07:44,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993705659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:07:44,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:07:44,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 19:07:44,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203948932] [2021-12-06 19:07:44,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:07:44,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 19:07:44,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:07:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 19:07:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:07:44,632 INFO L87 Difference]: Start difference. First operand 143 states and 213 transitions. Second operand has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 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) [2021-12-06 19:08:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:08:22,937 INFO L93 Difference]: Finished difference Result 601 states and 878 transitions. [2021-12-06 19:08:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 19:08:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 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 116 [2021-12-06 19:08:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:08:22,942 INFO L225 Difference]: With dead ends: 601 [2021-12-06 19:08:22,942 INFO L226 Difference]: Without dead ends: 466 [2021-12-06 19:08:22,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=2901, Invalid=6029, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 19:08:22,946 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 2354 mSDsluCounter, 4951 mSDsCounter, 0 mSdLazyCounter, 4195 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2354 SdHoareTripleChecker+Valid, 5161 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 4195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:08:22,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2354 Valid, 5161 Invalid, 4540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 4195 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2021-12-06 19:08:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-06 19:08:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 211. [2021-12-06 19:08:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 200 states have (on average 1.54) internal successors, (308), 202 states have internal predecessors, (308), 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) [2021-12-06 19:08:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 326 transitions. [2021-12-06 19:08:22,974 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 326 transitions. Word has length 116 [2021-12-06 19:08:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:08:22,975 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 326 transitions. [2021-12-06 19:08:22,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 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) [2021-12-06 19:08:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 326 transitions. [2021-12-06 19:08:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 19:08:22,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:08:22,976 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, 1, 1, 1] [2021-12-06 19:08:22,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 19:08:23,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:08:23,177 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:08:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:08:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1556286225, now seen corresponding path program 1 times [2021-12-06 19:08:23,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:08:23,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221128022] [2021-12-06 19:08:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:08:23,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:08:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:08:23,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:08:23,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 19:08:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:08:23,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:08:23,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:08:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-12-06 19:08:23,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:08:23,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:08:23,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221128022] [2021-12-06 19:08:23,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221128022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:08:23,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:08:23,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:08:23,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122573295] [2021-12-06 19:08:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:08:23,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:08:23,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:08:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:08:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:08:23,418 INFO L87 Difference]: Start difference. First operand 211 states and 326 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) [2021-12-06 19:08:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:08:23,578 INFO L93 Difference]: Finished difference Result 224 states and 340 transitions. [2021-12-06 19:08:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:08:23,578 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 121 [2021-12-06 19:08:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:08:23,580 INFO L225 Difference]: With dead ends: 224 [2021-12-06 19:08:23,580 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 19:08:23,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:08:23,581 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 237 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 [2021-12-06 19:08:23,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 237 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:08:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 19:08:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2021-12-06 19:08:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 205 states have (on average 1.5317073170731708) internal successors, (314), 207 states have internal predecessors, (314), 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) [2021-12-06 19:08:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 332 transitions. [2021-12-06 19:08:23,599 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 332 transitions. Word has length 121 [2021-12-06 19:08:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:08:23,599 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 332 transitions. [2021-12-06 19:08:23,599 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) [2021-12-06 19:08:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 332 transitions. [2021-12-06 19:08:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 19:08:23,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:08:23,601 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, 1, 1, 1] [2021-12-06 19:08:23,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 19:08:23,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:08:23,802 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:08:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:08:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1613544527, now seen corresponding path program 1 times [2021-12-06 19:08:23,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:08:23,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36236415] [2021-12-06 19:08:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:08:23,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:08:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:08:23,808 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:08:23,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 19:08:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:08:23,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:08:23,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:08:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-12-06 19:08:24,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:08:24,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:08:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36236415] [2021-12-06 19:08:24,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36236415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:08:24,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:08:24,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:08:24,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118867615] [2021-12-06 19:08:24,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:08:24,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:08:24,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:08:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:08:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:08:24,142 INFO L87 Difference]: Start difference. First operand 216 states and 332 transitions. Second operand has 6 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) [2021-12-06 19:08:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:08:24,267 INFO L93 Difference]: Finished difference Result 222 states and 337 transitions. [2021-12-06 19:08:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:08:24,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 121 [2021-12-06 19:08:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:08:24,269 INFO L225 Difference]: With dead ends: 222 [2021-12-06 19:08:24,269 INFO L226 Difference]: Without dead ends: 204 [2021-12-06 19:08:24,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:08:24,270 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 308 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 [2021-12-06 19:08:24,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 308 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:08:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-06 19:08:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-06 19:08:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 193 states have (on average 1.549222797927461) internal successors, (299), 196 states have internal predecessors, (299), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:08:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 314 transitions. [2021-12-06 19:08:24,288 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 314 transitions. Word has length 121 [2021-12-06 19:08:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:08:24,289 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 314 transitions. [2021-12-06 19:08:24,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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) [2021-12-06 19:08:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 314 transitions. [2021-12-06 19:08:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 19:08:24,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:08:24,290 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] [2021-12-06 19:08:24,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 19:08:24,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:08:24,491 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:08:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:08:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1975165408, now seen corresponding path program 1 times [2021-12-06 19:08:24,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:08:24,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061132719] [2021-12-06 19:08:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:08:24,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:08:24,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:08:24,496 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:08:24,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 19:08:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:08:24,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:08:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:08:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-06 19:08:24,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:08:24,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:08:24,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061132719] [2021-12-06 19:08:24,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061132719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:08:24,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:08:24,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:08:24,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938223891] [2021-12-06 19:08:24,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:08:24,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:08:24,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:08:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:08:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:08:24,730 INFO L87 Difference]: Start difference. First operand 204 states and 314 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-12-06 19:08:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:08:24,796 INFO L93 Difference]: Finished difference Result 230 states and 347 transitions. [2021-12-06 19:08:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:08:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 123 [2021-12-06 19:08:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:08:24,798 INFO L225 Difference]: With dead ends: 230 [2021-12-06 19:08:24,798 INFO L226 Difference]: Without dead ends: 204 [2021-12-06 19:08:24,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:08:24,799 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 184 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 [2021-12-06 19:08:24,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:08:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-06 19:08:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-06 19:08:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 193 states have (on average 1.544041450777202) internal successors, (298), 196 states have internal predecessors, (298), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:08:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 313 transitions. [2021-12-06 19:08:24,818 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 313 transitions. Word has length 123 [2021-12-06 19:08:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:08:24,818 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 313 transitions. [2021-12-06 19:08:24,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-12-06 19:08:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 313 transitions. [2021-12-06 19:08:24,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 19:08:24,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:08:24,819 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] [2021-12-06 19:08:24,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 19:08:25,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:08:25,020 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:08:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:08:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1388359394, now seen corresponding path program 1 times [2021-12-06 19:08:25,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:08:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990373546] [2021-12-06 19:08:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:08:25,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:08:25,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:08:25,021 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:08:25,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 19:08:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:08:25,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:08:25,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:08:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 19:08:25,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:08:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 19:08:25,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:08:25,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990373546] [2021-12-06 19:08:25,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990373546] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:08:25,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:08:25,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-06 19:08:25,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152922496] [2021-12-06 19:08:25,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:08:25,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:08:25,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:08:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:08:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:08:25,687 INFO L87 Difference]: Start difference. First operand 204 states and 313 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:08:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:08:25,832 INFO L93 Difference]: Finished difference Result 209 states and 317 transitions. [2021-12-06 19:08:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:08:25,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 123 [2021-12-06 19:08:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:08:25,835 INFO L225 Difference]: With dead ends: 209 [2021-12-06 19:08:25,835 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 19:08:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:08:25,836 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:08:25,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 249 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:08:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 19:08:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-12-06 19:08:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 188 states have (on average 1.5425531914893618) internal successors, (290), 191 states have internal predecessors, (290), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:08:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 305 transitions. [2021-12-06 19:08:25,852 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 305 transitions. Word has length 123 [2021-12-06 19:08:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:08:25,852 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 305 transitions. [2021-12-06 19:08:25,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:08:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 305 transitions. [2021-12-06 19:08:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 19:08:25,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:08:25,854 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, 1] [2021-12-06 19:08:25,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-06 19:08:26,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:08:26,055 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:08:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:08:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash 564140262, now seen corresponding path program 1 times [2021-12-06 19:08:26,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:08:26,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142285821] [2021-12-06 19:08:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:08:26,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:08:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:08:26,060 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:08:26,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 19:08:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:08:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:08:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:08:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 19:08:26,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:08:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 19:08:26,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:08:26,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142285821] [2021-12-06 19:08:26,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142285821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:08:26,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:08:26,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 19:08:26,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979131742] [2021-12-06 19:08:26,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:08:26,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:08:26,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:08:26,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:08:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:08:26,729 INFO L87 Difference]: Start difference. First operand 199 states and 305 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-12-06 19:08:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:08:27,021 INFO L93 Difference]: Finished difference Result 226 states and 338 transitions. [2021-12-06 19:08:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:08:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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 126 [2021-12-06 19:08:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:08:27,024 INFO L225 Difference]: With dead ends: 226 [2021-12-06 19:08:27,024 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 19:08:27,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:08:27,025 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:08:27,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 391 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:08:27,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 19:08:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-12-06 19:08:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 188 states have internal predecessors, (242), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:08:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 254 transitions. [2021-12-06 19:08:27,040 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 254 transitions. Word has length 126 [2021-12-06 19:08:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:08:27,041 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 254 transitions. [2021-12-06 19:08:27,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-12-06 19:08:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 254 transitions. [2021-12-06 19:08:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 19:08:27,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:08:27,042 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] [2021-12-06 19:08:27,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 19:08:27,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:08:27,243 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:08:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:08:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 300411547, now seen corresponding path program 2 times [2021-12-06 19:08:27,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:08:27,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938983487] [2021-12-06 19:08:27,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:08:27,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:08:27,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:08:27,248 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:08:27,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 19:08:27,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:08:27,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:08:27,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 19:08:27,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:08:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-12-06 19:08:27,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:08:28,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:08:28,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938983487] [2021-12-06 19:08:28,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938983487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:08:28,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1950932103] [2021-12-06 19:08:28,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:08:28,345 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:08:28,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:08:28,346 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:08:28,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-06 19:08:28,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:08:28,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:08:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:08:28,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:08:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-12-06 19:08:28,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:08:29,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1950932103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:08:29,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:08:29,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 19:08:29,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175399471] [2021-12-06 19:08:29,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:08:29,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:08:29,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:08:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:08:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:08:29,262 INFO L87 Difference]: Start difference. First operand 196 states and 254 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:08:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:08:29,575 INFO L93 Difference]: Finished difference Result 197 states and 255 transitions. [2021-12-06 19:08:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:08:29,576 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), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 130 [2021-12-06 19:08:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:08:29,577 INFO L225 Difference]: With dead ends: 197 [2021-12-06 19:08:29,577 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 19:08:29,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:08:29,578 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:08:29,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 212 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:08:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 19:08:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 19:08:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-12-06 19:08:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 19:08:29,579 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2021-12-06 19:08:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:08:29,580 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 19:08:29,580 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:08:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 19:08:29,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 19:08:29,582 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 19:08:29,582 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 19:08:29,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 19:08:29,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-12-06 19:08:29,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b4bab3-628d-4b5f-9e78-aa54bd9f97c3/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:08:29,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.