./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:41:07,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:41:07,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:41:07,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:41:07,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:41:07,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:41:07,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:41:07,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:41:07,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:41:07,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:41:07,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:41:07,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:41:07,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:41:07,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:41:07,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:41:07,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:41:07,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:41:07,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:41:07,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:41:07,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:41:07,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:41:07,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:41:07,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:41:07,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:41:07,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:41:07,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:41:07,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:41:07,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:41:07,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:41:07,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:41:07,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:41:07,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:41:07,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:41:07,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:41:07,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:41:07,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:41:07,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:41:07,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:41:07,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:41:07,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:41:07,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:41:07,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:41:07,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:41:07,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:41:07,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:41:07,846 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:41:07,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:41:07,846 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:41:07,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:41:07,847 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:41:07,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:41:07,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:41:07,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:41:07,849 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:41:07,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:41:07,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:41:07,850 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:41:07,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:41:07,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:41:07,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:41:07,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:41:07,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:41:07,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:41:07,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:41:07,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:41:07,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:41:07,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:41:07,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:41:07,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:41:07,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:41:07,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:41:07,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:41:07,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:41:07,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:41:07,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:41:07,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:41:07,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:41:07,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:41:07,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:41:07,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:41:07,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:41:07,861 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2021-11-03 05:41:08,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:41:08,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:41:08,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:41:08,278 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:41:08,279 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:41:08,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-11-03 05:41:08,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/1f397896d/6fb12a5e9ed8485aad983af22bd53f66/FLAG4664497c3 [2021-11-03 05:41:09,114 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:41:09,116 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-11-03 05:41:09,152 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/1f397896d/6fb12a5e9ed8485aad983af22bd53f66/FLAG4664497c3 [2021-11-03 05:41:09,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/1f397896d/6fb12a5e9ed8485aad983af22bd53f66 [2021-11-03 05:41:09,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:41:09,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:41:09,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:41:09,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:41:09,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:41:09,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:09" (1/1) ... [2021-11-03 05:41:09,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9a5408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:09, skipping insertion in model container [2021-11-03 05:41:09,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:09" (1/1) ... [2021-11-03 05:41:09,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:41:09,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:41:10,045 WARN L228 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_ffc999a8-10f9-4e96-a182-5b7aff567c7c/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-11-03 05:41:10,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:41:10,077 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:41:10,177 WARN L228 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_ffc999a8-10f9-4e96-a182-5b7aff567c7c/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-11-03 05:41:10,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:41:10,239 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:41:10,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10 WrapperNode [2021-11-03 05:41:10,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:41:10,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:41:10,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:41:10,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:41:10,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:41:10,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:41:10,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:41:10,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:41:10,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:41:10,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:41:10,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:41:10,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:41:10,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (1/1) ... [2021-11-03 05:41:10,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:41:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:41:10,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:41:10,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:41:10,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 05:41:10,556 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2021-11-03 05:41:10,556 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2021-11-03 05:41:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 05:41:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:41:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2021-11-03 05:41:10,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2021-11-03 05:41:10,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:41:10,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:41:10,558 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2021-11-03 05:41:10,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2021-11-03 05:41:10,558 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2021-11-03 05:41:10,559 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2021-11-03 05:41:10,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:41:10,559 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2021-11-03 05:41:10,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2021-11-03 05:41:10,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:41:10,560 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2021-11-03 05:41:10,560 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2021-11-03 05:41:10,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:41:10,561 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2021-11-03 05:41:10,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2021-11-03 05:41:10,561 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-03 05:41:10,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:41:10,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:41:24,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:41:24,146 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2021-11-03 05:41:24,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:41:24 BoogieIcfgContainer [2021-11-03 05:41:24,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:41:24,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:41:24,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:41:24,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:41:24,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:41:09" (1/3) ... [2021-11-03 05:41:24,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9e8eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:41:24, skipping insertion in model container [2021-11-03 05:41:24,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:10" (2/3) ... [2021-11-03 05:41:24,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9e8eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:41:24, skipping insertion in model container [2021-11-03 05:41:24,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:41:24" (3/3) ... [2021-11-03 05:41:24,160 INFO L111 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2021-11-03 05:41:24,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:41:24,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:41:24,225 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:41:24,232 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:41:24,233 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:41:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 52 states have internal predecessors, (68), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-03 05:41:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:41:24,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:24,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:24,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:41:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:24,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1512267754, now seen corresponding path program 1 times [2021-11-03 05:41:24,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:41:24,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13726171] [2021-11-03 05:41:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:24,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:41:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:41:24,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:41:24,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13726171] [2021-11-03 05:41:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13726171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:24,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:24,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 05:41:24,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008066313] [2021-11-03 05:41:24,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:41:24,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:41:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:41:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:41:24,935 INFO L87 Difference]: Start difference. First operand has 78 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 52 states have internal predecessors, (68), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:33,490 INFO L93 Difference]: Finished difference Result 176 states and 258 transitions. [2021-11-03 05:41:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:41:33,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 05:41:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:33,505 INFO L225 Difference]: With dead ends: 176 [2021-11-03 05:41:33,506 INFO L226 Difference]: Without dead ends: 83 [2021-11-03 05:41:33,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:41:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-03 05:41:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-03 05:41:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 58 states have internal predecessors, (73), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-03 05:41:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2021-11-03 05:41:33,570 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 12 [2021-11-03 05:41:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:33,571 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2021-11-03 05:41:33,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2021-11-03 05:41:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 05:41:33,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:33,576 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:33,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:41:33,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:41:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1322878088, now seen corresponding path program 1 times [2021-11-03 05:41:33,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:41:33,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220720977] [2021-11-03 05:41:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:33,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:41:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:41:34,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:41:34,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220720977] [2021-11-03 05:41:34,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220720977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:41:34,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810251668] [2021-11-03 05:41:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:34,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:41:34,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:41:34,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:41:34,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:41:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 05:41:35,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:35,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:41:35,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:41:35,440 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:41:35,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:41:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-03 05:41:35,602 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:41:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 125 [2021-11-03 05:41:35,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:35,706 INFO L354 Elim1Store]: treesize reduction 162, result has 38.4 percent of original size [2021-11-03 05:41:35,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 186 [2021-11-03 05:41:35,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-03 05:41:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904784899] [2021-11-03 05:41:35,755 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-03 05:41:35,755 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:41:35,762 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 05:41:35,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:41:35,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-03 05:41:35,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943332850] [2021-11-03 05:41:35,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-03 05:41:35,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:41:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-03 05:41:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:41:35,771 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:41:35,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:35,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:41:35,988 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@462b839b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 05:41:35,991 INFO L168 Benchmark]: Toolchain (without parser) took 26716.57 ms. Allocated memory was 86.0 MB in the beginning and 153.1 MB in the end (delta: 67.1 MB). Free memory was 48.1 MB in the beginning and 87.7 MB in the end (delta: -39.5 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:35,991 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:41:35,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 960.87 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 47.9 MB in the beginning and 71.1 MB in the end (delta: -23.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:35,993 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.22 ms. Allocated memory is still 111.1 MB. Free memory was 71.1 MB in the beginning and 67.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:35,994 INFO L168 Benchmark]: Boogie Preprocessor took 91.96 ms. Allocated memory is still 111.1 MB. Free memory was 67.8 MB in the beginning and 64.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:35,994 INFO L168 Benchmark]: RCFGBuilder took 13696.03 ms. Allocated memory is still 111.1 MB. Free memory was 64.4 MB in the beginning and 47.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:35,995 INFO L168 Benchmark]: TraceAbstraction took 11838.67 ms. Allocated memory was 111.1 MB in the beginning and 153.1 MB in the end (delta: 41.9 MB). Free memory was 46.8 MB in the beginning and 87.7 MB in the end (delta: -40.8 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:35,999 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 960.87 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 47.9 MB in the beginning and 71.1 MB in the end (delta: -23.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.22 ms. Allocated memory is still 111.1 MB. Free memory was 71.1 MB in the beginning and 67.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 91.96 ms. Allocated memory is still 111.1 MB. Free memory was 67.8 MB in the beginning and 64.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 13696.03 ms. Allocated memory is still 111.1 MB. Free memory was 64.4 MB in the beginning and 47.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11838.67 ms. Allocated memory was 111.1 MB in the beginning and 153.1 MB in the end (delta: 41.9 MB). Free memory was 46.8 MB in the beginning and 87.7 MB in the end (delta: -40.8 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@462b839b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@462b839b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-03 05:41:36,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/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_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:41:39,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:41:39,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:41:39,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:41:39,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:41:39,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:41:39,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:41:39,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:41:39,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:41:39,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:41:39,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:41:39,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:41:39,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:41:39,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:41:39,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:41:39,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:41:39,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:41:39,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:41:39,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:41:39,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:41:39,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:41:39,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:41:39,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:41:39,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:41:39,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:41:39,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:41:39,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:41:39,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:41:39,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:41:39,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:41:39,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:41:39,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:41:39,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:41:39,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:41:39,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:41:39,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:41:39,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:41:39,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:41:39,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:41:39,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:41:39,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:41:39,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:41:39,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:41:39,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:41:39,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:41:39,238 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:41:39,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:41:39,239 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:41:39,239 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:41:39,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:41:39,240 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:41:39,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:41:39,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:41:39,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:41:39,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:41:39,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:41:39,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:41:39,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:41:39,243 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:41:39,243 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:41:39,243 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:41:39,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:41:39,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:41:39,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:41:39,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:41:39,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:41:39,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:41:39,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:41:39,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:41:39,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:41:39,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:41:39,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:41:39,251 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:41:39,251 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:41:39,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:41:39,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:41:39,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:41:39,252 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_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2021-11-03 05:41:39,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:41:39,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:41:39,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:41:39,811 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:41:39,812 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:41:39,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-11-03 05:41:39,913 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/bef389277/672b44d28bfd4694a95f30165df69436/FLAGafb06ef04 [2021-11-03 05:41:40,830 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:41:40,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-11-03 05:41:40,856 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/bef389277/672b44d28bfd4694a95f30165df69436/FLAGafb06ef04 [2021-11-03 05:41:40,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/data/bef389277/672b44d28bfd4694a95f30165df69436 [2021-11-03 05:41:40,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:41:40,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:41:40,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:41:40,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:41:40,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:41:41,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:40" (1/1) ... [2021-11-03 05:41:41,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab2356b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41, skipping insertion in model container [2021-11-03 05:41:41,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:40" (1/1) ... [2021-11-03 05:41:41,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:41:41,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:41:41,764 WARN L228 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_ffc999a8-10f9-4e96-a182-5b7aff567c7c/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-11-03 05:41:41,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:41:41,799 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:41:41,890 WARN L228 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_ffc999a8-10f9-4e96-a182-5b7aff567c7c/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-11-03 05:41:41,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:41:41,972 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:41:41,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41 WrapperNode [2021-11-03 05:41:41,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:41:41,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:41:41,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:41:41,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:41:41,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:41:42,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:41:42,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:41:42,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:41:42,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:41:42,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:41:42,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:41:42,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:41:42,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (1/1) ... [2021-11-03 05:41:42,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:41:42,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:41:42,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:41:42,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:41:42,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:41:42,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:41:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2021-11-03 05:41:42,330 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2021-11-03 05:41:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:41:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2021-11-03 05:41:42,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2021-11-03 05:41:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:41:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:41:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2021-11-03 05:41:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2021-11-03 05:41:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2021-11-03 05:41:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2021-11-03 05:41:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:41:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2021-11-03 05:41:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2021-11-03 05:41:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:41:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:41:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:41:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 05:41:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2021-11-03 05:41:42,339 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2021-11-03 05:41:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2021-11-03 05:41:42,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2021-11-03 05:41:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-03 05:41:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:41:42,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:41:48,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:41:48,448 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2021-11-03 05:41:48,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:41:48 BoogieIcfgContainer [2021-11-03 05:41:48,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:41:48,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:41:48,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:41:48,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:41:48,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:41:40" (1/3) ... [2021-11-03 05:41:48,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bbbe05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:41:48, skipping insertion in model container [2021-11-03 05:41:48,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:41" (2/3) ... [2021-11-03 05:41:48,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bbbe05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:41:48, skipping insertion in model container [2021-11-03 05:41:48,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:41:48" (3/3) ... [2021-11-03 05:41:48,462 INFO L111 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2021-11-03 05:41:48,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:41:48,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:41:48,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:41:48,540 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:41:48,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:41:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 97 states have (on average 1.422680412371134) internal successors, (138), 98 states have internal predecessors, (138), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-03 05:41:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:41:48,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:48,577 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:48,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:41:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash 191678913, now seen corresponding path program 1 times [2021-11-03 05:41:48,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:48,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912603627] [2021-11-03 05:41:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:48,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:48,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:48,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:48,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:41:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:41:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:48,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:41:49,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:41:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:41:49,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:41:49,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:49,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912603627] [2021-11-03 05:41:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912603627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:49,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:49,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-03 05:41:49,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102800838] [2021-11-03 05:41:49,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:41:49,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:41:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:41:49,784 INFO L87 Difference]: Start difference. First operand has 124 states, 97 states have (on average 1.422680412371134) internal successors, (138), 98 states have internal predecessors, (138), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:12,609 INFO L93 Difference]: Finished difference Result 269 states and 399 transitions. [2021-11-03 05:42:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:42:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:42:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:12,626 INFO L225 Difference]: With dead ends: 269 [2021-11-03 05:42:12,626 INFO L226 Difference]: Without dead ends: 125 [2021-11-03 05:42:12,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:42:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-03 05:42:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-11-03 05:42:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 99 states have internal predecessors, (136), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-03 05:42:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2021-11-03 05:42:12,697 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 15 [2021-11-03 05:42:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:12,698 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2021-11-03 05:42:12,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2021-11-03 05:42:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:42:12,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:12,704 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:42:12,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:42:12,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:42:12,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:12,924 INFO L85 PathProgramCache]: Analyzing trace with hash -835354618, now seen corresponding path program 1 times [2021-11-03 05:42:12,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:42:12,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211557258] [2021-11-03 05:42:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:12,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:42:12,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:42:12,929 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:42:12,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:42:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:13,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:42:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:13,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:13,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:42:13,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211557258] [2021-11-03 05:42:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211557258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:13,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:13,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:42:13,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563718861] [2021-11-03 05:42:13,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:42:13,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:42:13,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:42:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:42:13,391 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:13,427 INFO L93 Difference]: Finished difference Result 236 states and 346 transitions. [2021-11-03 05:42:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:42:13,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 05:42:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:13,431 INFO L225 Difference]: With dead ends: 236 [2021-11-03 05:42:13,432 INFO L226 Difference]: Without dead ends: 126 [2021-11-03 05:42:13,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:42:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-03 05:42:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-11-03 05:42:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 96 states have (on average 1.40625) internal successors, (135), 99 states have internal predecessors, (135), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-03 05:42:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 171 transitions. [2021-11-03 05:42:13,454 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 171 transitions. Word has length 27 [2021-11-03 05:42:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:13,455 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 171 transitions. [2021-11-03 05:42:13,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 171 transitions. [2021-11-03 05:42:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-03 05:42:13,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:13,458 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:42:13,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:42:13,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:42:13,673 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash 313595982, now seen corresponding path program 1 times [2021-11-03 05:42:13,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:42:13,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454563414] [2021-11-03 05:42:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:13,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:42:13,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:42:13,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:42:13,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:42:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:42:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:13,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:42:14,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:42:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:14,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:14,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:42:14,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454563414] [2021-11-03 05:42:14,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454563414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:14,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:14,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-03 05:42:14,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676694728] [2021-11-03 05:42:14,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:42:14,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:42:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:42:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:42:14,677 INFO L87 Difference]: Start difference. First operand 124 states and 171 transitions. Second operand has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:46,785 INFO L93 Difference]: Finished difference Result 270 states and 402 transitions. [2021-11-03 05:42:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:42:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-03 05:42:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:46,790 INFO L225 Difference]: With dead ends: 270 [2021-11-03 05:42:46,790 INFO L226 Difference]: Without dead ends: 160 [2021-11-03 05:42:46,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:42:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-03 05:42:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 146. [2021-11-03 05:42:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 114 states have (on average 1.412280701754386) internal successors, (161), 118 states have internal predecessors, (161), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) [2021-11-03 05:42:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2021-11-03 05:42:46,818 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 28 [2021-11-03 05:42:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:46,819 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2021-11-03 05:42:46,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2021-11-03 05:42:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-03 05:42:46,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:46,823 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:42:46,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 05:42:47,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:42:47,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 571761420, now seen corresponding path program 1 times [2021-11-03 05:42:47,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:42:47,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193392488] [2021-11-03 05:42:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:47,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:42:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:42:47,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:42:47,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:42:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:47,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 05:42:47,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:47,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:42:47,691 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-03 05:42:47,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-03 05:42:47,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:42:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:47,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:49,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((|system_initialize_~#e~1.base| (_ BitVec 32))) (not (= ~sys_state_s~0~AS_IDLE (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) |c_system_initialize_~#e~1.offset| ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset)))) is different from false [2021-11-03 05:42:52,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((|system_initialize_~#e~1.base| (_ BitVec 32))) (not (= ~sys_state_s~0~AS_IDLE (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) (_ bv0 32) ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset)))) is different from false [2021-11-03 05:42:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:52,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:42:52,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193392488] [2021-11-03 05:42:52,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193392488] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 05:42:52,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:42:52,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-03 05:42:52,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010257581] [2021-11-03 05:42:52,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:42:52,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:42:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:42:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=85, Unknown=2, NotChecked=38, Total=156 [2021-11-03 05:42:52,148 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:54,358 WARN L838 $PredicateComparison]: unable to prove that (and (not (= ~sys_state_s~0~AS_IDLE c_ASNull_status_update_~status)) (not (= (select (select |c_#memory_int| c_~user~0.base) c_~user~0.offset) ~sys_state_s~0~AS_IDLE)) (forall ((|system_initialize_~#e~1.base| (_ BitVec 32))) (not (= ~sys_state_s~0~AS_IDLE (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) (_ bv0 32) ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset))))) is different from false [2021-11-03 05:43:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:02,898 INFO L93 Difference]: Finished difference Result 362 states and 540 transitions. [2021-11-03 05:43:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:43:02,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-03 05:43:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:02,905 INFO L225 Difference]: With dead ends: 362 [2021-11-03 05:43:02,905 INFO L226 Difference]: Without dead ends: 230 [2021-11-03 05:43:02,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=47, Invalid=144, Unknown=3, NotChecked=78, Total=272 [2021-11-03 05:43:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-03 05:43:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2021-11-03 05:43:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 169 states have (on average 1.3964497041420119) internal successors, (236), 172 states have internal predecessors, (236), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (43), 27 states have call predecessors, (43), 26 states have call successors, (43) [2021-11-03 05:43:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 309 transitions. [2021-11-03 05:43:02,946 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 309 transitions. Word has length 28 [2021-11-03 05:43:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:02,946 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 309 transitions. [2021-11-03 05:43:02,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 309 transitions. [2021-11-03 05:43:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 05:43:02,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:02,972 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:43:03,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:43:03,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:43:03,173 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:43:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2025119411, now seen corresponding path program 1 times [2021-11-03 05:43:03,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:43:03,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605582612] [2021-11-03 05:43:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:03,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:43:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:43:03,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:43:03,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:43:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:03,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:43:03,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:43:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:43:03,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 05:43:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:03,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:43:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:03,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:43:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605582612] [2021-11-03 05:43:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605582612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:03,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:03,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-03 05:43:03,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25935567] [2021-11-03 05:43:03,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:43:03,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:43:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:43:03,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:43:03,980 INFO L87 Difference]: Start difference. First operand 215 states and 309 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:30,027 INFO L93 Difference]: Finished difference Result 427 states and 615 transitions. [2021-11-03 05:43:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:43:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-03 05:43:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:30,034 INFO L225 Difference]: With dead ends: 427 [2021-11-03 05:43:30,034 INFO L226 Difference]: Without dead ends: 221 [2021-11-03 05:43:30,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:43:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-03 05:43:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2021-11-03 05:43:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 172 states have (on average 1.3895348837209303) internal successors, (239), 174 states have internal predecessors, (239), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (43), 27 states have call predecessors, (43), 26 states have call successors, (43) [2021-11-03 05:43:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 312 transitions. [2021-11-03 05:43:30,107 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 312 transitions. Word has length 29 [2021-11-03 05:43:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:30,112 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 312 transitions. [2021-11-03 05:43:30,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 312 transitions. [2021-11-03 05:43:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:43:30,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:30,116 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:43:30,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:43:30,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:43:30,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:43:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1907924199, now seen corresponding path program 1 times [2021-11-03 05:43:30,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:43:30,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512617290] [2021-11-03 05:43:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:30,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:43:30,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:43:30,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:43:30,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:43:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:43:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:43:30,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:43:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:43:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:31,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:43:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:31,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:43:31,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512617290] [2021-11-03 05:43:31,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512617290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:31,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:31,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-03 05:43:31,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022950183] [2021-11-03 05:43:31,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:43:31,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:43:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:43:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:43:31,527 INFO L87 Difference]: Start difference. First operand 218 states and 312 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:04,487 INFO L93 Difference]: Finished difference Result 421 states and 607 transitions. [2021-11-03 05:44:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:44:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-03 05:44:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:04,491 INFO L225 Difference]: With dead ends: 421 [2021-11-03 05:44:04,491 INFO L226 Difference]: Without dead ends: 216 [2021-11-03 05:44:04,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:44:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-03 05:44:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2021-11-03 05:44:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 169 states have (on average 1.3905325443786982) internal successors, (235), 171 states have internal predecessors, (235), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (43), 27 states have call predecessors, (43), 26 states have call successors, (43) [2021-11-03 05:44:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 307 transitions. [2021-11-03 05:44:04,516 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 307 transitions. Word has length 30 [2021-11-03 05:44:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:04,517 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 307 transitions. [2021-11-03 05:44:04,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 307 transitions. [2021-11-03 05:44:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:44:04,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:04,520 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:04,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:44:04,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:44:04,737 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:44:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash -887190847, now seen corresponding path program 1 times [2021-11-03 05:44:04,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:44:04,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20642051] [2021-11-03 05:44:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:04,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:44:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:44:04,740 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:44:04,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:44:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:44:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:05,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:44:05,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-03 05:44:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:05,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:44:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:05,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:44:05,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20642051] [2021-11-03 05:44:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20642051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:05,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:05,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 05:44:05,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957417740] [2021-11-03 05:44:05,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:44:05,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:44:05,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:44:05,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:44:05,474 INFO L87 Difference]: Start difference. First operand 214 states and 307 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:26,317 INFO L93 Difference]: Finished difference Result 425 states and 651 transitions. [2021-11-03 05:44:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:44:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-03 05:44:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:26,322 INFO L225 Difference]: With dead ends: 425 [2021-11-03 05:44:26,322 INFO L226 Difference]: Without dead ends: 224 [2021-11-03 05:44:26,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:44:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-03 05:44:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2021-11-03 05:44:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 174 states have (on average 1.3793103448275863) internal successors, (240), 176 states have internal predecessors, (240), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (43), 27 states have call predecessors, (43), 26 states have call successors, (43) [2021-11-03 05:44:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 313 transitions. [2021-11-03 05:44:26,347 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 313 transitions. Word has length 30 [2021-11-03 05:44:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:26,348 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 313 transitions. [2021-11-03 05:44:26,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 313 transitions. [2021-11-03 05:44:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-03 05:44:26,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:26,350 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:26,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 05:44:26,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:44:26,570 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:44:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:26,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1592982185, now seen corresponding path program 1 times [2021-11-03 05:44:26,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:44:26,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113725450] [2021-11-03 05:44:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:26,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:44:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:44:26,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:44:26,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:44:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:26,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 05:44:26,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:27,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:44:27,143 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-03 05:44:27,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-03 05:44:27,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:44:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:27,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:44:29,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((|system_initialize_~#e~1.base| (_ BitVec 32))) (not (= ~sys_state_s~0~AS_IDLE (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) |c_system_initialize_~#e~1.offset| ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset)))) is different from false [2021-11-03 05:44:31,417 WARN L838 $PredicateComparison]: unable to prove that (forall ((|system_initialize_~#e~1.base| (_ BitVec 32))) (not (= ~sys_state_s~0~AS_IDLE (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) (_ bv0 32) ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset)))) is different from false [2021-11-03 05:44:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:31,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:44:31,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113725450] [2021-11-03 05:44:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113725450] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 05:44:31,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:44:31,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-03 05:44:31,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876087305] [2021-11-03 05:44:31,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:44:31,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:44:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:44:31,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=85, Unknown=2, NotChecked=38, Total=156 [2021-11-03 05:44:31,515 INFO L87 Difference]: Start difference. First operand 220 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:33,743 WARN L838 $PredicateComparison]: unable to prove that (and (not (= ~sys_state_s~0~AS_IDLE c_ASStop_status_update_~status)) (not (= (select (select |c_#memory_int| c_~user~0.base) c_~user~0.offset) ~sys_state_s~0~AS_IDLE)) (forall ((|system_initialize_~#e~1.base| (_ BitVec 32))) (not (= ~sys_state_s~0~AS_IDLE (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) (_ bv0 32) ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset))))) is different from false [2021-11-03 05:44:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:46,505 INFO L93 Difference]: Finished difference Result 627 states and 961 transitions. [2021-11-03 05:44:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:44:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-03 05:44:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:46,510 INFO L225 Difference]: With dead ends: 627 [2021-11-03 05:44:46,510 INFO L226 Difference]: Without dead ends: 388 [2021-11-03 05:44:46,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=47, Invalid=144, Unknown=3, NotChecked=78, Total=272 [2021-11-03 05:44:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-03 05:44:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 358. [2021-11-03 05:44:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 284 states have (on average 1.341549295774648) internal successors, (381), 279 states have internal predecessors, (381), 46 states have call successors, (46), 26 states have call predecessors, (46), 27 states have return successors, (92), 52 states have call predecessors, (92), 37 states have call successors, (92) [2021-11-03 05:44:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 519 transitions. [2021-11-03 05:44:46,549 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 519 transitions. Word has length 31 [2021-11-03 05:44:46,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:46,550 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 519 transitions. [2021-11-03 05:44:46,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 519 transitions. [2021-11-03 05:44:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 05:44:46,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:46,553 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:46,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 05:44:46,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:44:46,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:44:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash -955605667, now seen corresponding path program 1 times [2021-11-03 05:44:46,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:44:46,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763356058] [2021-11-03 05:44:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:46,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:44:46,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:44:46,772 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:44:46,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:44:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 05:44:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:47,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:44:47,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:44:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:47,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:44:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:47,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:44:47,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763356058] [2021-11-03 05:44:47,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763356058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:47,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:47,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-03 05:44:47,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96631482] [2021-11-03 05:44:47,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:44:47,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:44:47,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:44:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:44:47,594 INFO L87 Difference]: Start difference. First operand 358 states and 519 transitions. Second operand has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:14,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:14,431 INFO L93 Difference]: Finished difference Result 812 states and 1284 transitions. [2021-11-03 05:45:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 05:45:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 05:45:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:14,438 INFO L225 Difference]: With dead ends: 812 [2021-11-03 05:45:14,438 INFO L226 Difference]: Without dead ends: 465 [2021-11-03 05:45:14,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:45:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-03 05:45:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 422. [2021-11-03 05:45:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 335 states have (on average 1.337313432835821) internal successors, (448), 331 states have internal predecessors, (448), 50 states have call successors, (50), 34 states have call predecessors, (50), 36 states have return successors, (100), 56 states have call predecessors, (100), 41 states have call successors, (100) [2021-11-03 05:45:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 598 transitions. [2021-11-03 05:45:14,483 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 598 transitions. Word has length 41 [2021-11-03 05:45:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:14,483 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 598 transitions. [2021-11-03 05:45:14,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 598 transitions. [2021-11-03 05:45:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 05:45:14,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:14,487 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:14,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:14,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:14,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -794400909, now seen corresponding path program 1 times [2021-11-03 05:45:14,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:14,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243531078] [2021-11-03 05:45:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:14,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:14,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:14,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:45:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:15,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:45:15,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:45:15,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:45:15,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:15,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243531078] [2021-11-03 05:45:15,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243531078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:15,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:15,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:45:15,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750612700] [2021-11-03 05:45:15,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:45:15,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:45:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:15,212 INFO L87 Difference]: Start difference. First operand 422 states and 598 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, (7), 2 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:15,252 INFO L93 Difference]: Finished difference Result 800 states and 1215 transitions. [2021-11-03 05:45:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:45:15,254 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, (7), 2 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 05:45:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:15,259 INFO L225 Difference]: With dead ends: 800 [2021-11-03 05:45:15,259 INFO L226 Difference]: Without dead ends: 428 [2021-11-03 05:45:15,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-03 05:45:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2021-11-03 05:45:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 339 states have (on average 1.3303834808259587) internal successors, (451), 337 states have internal predecessors, (451), 50 states have call successors, (50), 34 states have call predecessors, (50), 38 states have return successors, (102), 56 states have call predecessors, (102), 41 states have call successors, (102) [2021-11-03 05:45:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 603 transitions. [2021-11-03 05:45:15,294 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 603 transitions. Word has length 41 [2021-11-03 05:45:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:15,294 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 603 transitions. [2021-11-03 05:45:15,294 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, (7), 2 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 603 transitions. [2021-11-03 05:45:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:45:15,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:15,297 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2021-11-03 05:45:15,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:15,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:15,513 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash -540510950, now seen corresponding path program 1 times [2021-11-03 05:45:15,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:15,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621817635] [2021-11-03 05:45:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:15,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:15,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:15,515 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:15,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:45:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:15,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:45:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:15,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:45:15,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 05:45:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:16,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:16,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621817635] [2021-11-03 05:45:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621817635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:16,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:16,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-03 05:45:16,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352728318] [2021-11-03 05:45:16,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:45:16,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:45:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:45:16,334 INFO L87 Difference]: Start difference. First operand 428 states and 603 transitions. Second operand has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:46,129 INFO L93 Difference]: Finished difference Result 830 states and 1256 transitions. [2021-11-03 05:45:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:45:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 05:45:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:46,135 INFO L225 Difference]: With dead ends: 830 [2021-11-03 05:45:46,135 INFO L226 Difference]: Without dead ends: 452 [2021-11-03 05:45:46,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:45:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-03 05:45:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 437. [2021-11-03 05:45:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 346 states have (on average 1.329479768786127) internal successors, (460), 344 states have internal predecessors, (460), 51 states have call successors, (51), 35 states have call predecessors, (51), 39 states have return successors, (105), 57 states have call predecessors, (105), 42 states have call successors, (105) [2021-11-03 05:45:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 616 transitions. [2021-11-03 05:45:46,171 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 616 transitions. Word has length 42 [2021-11-03 05:45:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:46,171 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 616 transitions. [2021-11-03 05:45:46,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 616 transitions. [2021-11-03 05:45:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:45:46,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:46,175 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2021-11-03 05:45:46,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:46,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:46,392 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:45:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash -478471336, now seen corresponding path program 1 times [2021-11-03 05:45:46,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:46,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986727170] [2021-11-03 05:45:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:46,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:46,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:46,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:45:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:45:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:46,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:45:47,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:45:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:45:47,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:45:47,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:47,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986727170] [2021-11-03 05:45:47,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986727170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:47,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:47,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-03 05:45:47,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660882441] [2021-11-03 05:45:47,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:45:47,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:47,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:45:47,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:45:47,551 INFO L87 Difference]: Start difference. First operand 437 states and 616 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (10), 5 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:46:23,168 INFO L93 Difference]: Finished difference Result 863 states and 1322 transitions. [2021-11-03 05:46:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:46:23,169 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (10), 5 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 05:46:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:46:23,174 INFO L225 Difference]: With dead ends: 863 [2021-11-03 05:46:23,174 INFO L226 Difference]: Without dead ends: 476 [2021-11-03 05:46:23,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:46:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-03 05:46:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 458. [2021-11-03 05:46:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 364 states have (on average 1.335164835164835) internal successors, (486), 362 states have internal predecessors, (486), 52 states have call successors, (52), 37 states have call predecessors, (52), 41 states have return successors, (108), 58 states have call predecessors, (108), 43 states have call successors, (108) [2021-11-03 05:46:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 646 transitions. [2021-11-03 05:46:23,209 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 646 transitions. Word has length 42 [2021-11-03 05:46:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:46:23,212 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 646 transitions. [2021-11-03 05:46:23,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (10), 5 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:46:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 646 transitions. [2021-11-03 05:46:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:46:23,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:46:23,215 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:46:23,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:46:23,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:46:23,433 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:46:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:46:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1534939229, now seen corresponding path program 1 times [2021-11-03 05:46:23,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:46:23,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646163811] [2021-11-03 05:46:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:46:23,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:46:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:46:23,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:46:23,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:46:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:46:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:46:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:46:24,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:46:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:24,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:46:24,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-03 05:46:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:46:24,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:46:24,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646163811] [2021-11-03 05:46:24,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646163811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:46:24,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:46:24,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-03 05:46:24,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584905456] [2021-11-03 05:46:24,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:46:24,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:46:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:46:24,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:46:24,417 INFO L87 Difference]: Start difference. First operand 458 states and 646 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (8), 4 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:02,395 INFO L93 Difference]: Finished difference Result 1503 states and 2576 transitions. [2021-11-03 05:47:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:47:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (8), 4 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 05:47:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:02,413 INFO L225 Difference]: With dead ends: 1503 [2021-11-03 05:47:02,413 INFO L226 Difference]: Without dead ends: 1056 [2021-11-03 05:47:02,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:47:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-11-03 05:47:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1022. [2021-11-03 05:47:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 816 states have (on average 1.275735294117647) internal successors, (1041), 776 states have internal predecessors, (1041), 91 states have call successors, (91), 66 states have call predecessors, (91), 114 states have return successors, (587), 179 states have call predecessors, (587), 80 states have call successors, (587) [2021-11-03 05:47:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1719 transitions. [2021-11-03 05:47:02,538 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1719 transitions. Word has length 42 [2021-11-03 05:47:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:02,538 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1719 transitions. [2021-11-03 05:47:02,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (8), 4 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1719 transitions. [2021-11-03 05:47:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:47:02,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:02,542 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:02,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:02,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:02,748 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash -948133215, now seen corresponding path program 1 times [2021-11-03 05:47:02,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:02,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145404777] [2021-11-03 05:47:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:02,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:02,751 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:02,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:47:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:03,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:47:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:03,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:47:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:47:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:03,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:47:03,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:03,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145404777] [2021-11-03 05:47:03,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145404777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:03,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 12 [2021-11-03 05:47:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901901298] [2021-11-03 05:47:03,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:47:03,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:03,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:47:03,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:47:03,885 INFO L87 Difference]: Start difference. First operand 1022 states and 1719 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:15,545 INFO L93 Difference]: Finished difference Result 2142 states and 4192 transitions. [2021-11-03 05:47:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:47:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 05:47:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:15,565 INFO L225 Difference]: With dead ends: 2142 [2021-11-03 05:47:15,565 INFO L226 Difference]: Without dead ends: 1180 [2021-11-03 05:47:15,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:47:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-11-03 05:47:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1137. [2021-11-03 05:47:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 908 states have (on average 1.2588105726872247) internal successors, (1143), 860 states have internal predecessors, (1143), 96 states have call successors, (96), 68 states have call predecessors, (96), 132 states have return successors, (697), 208 states have call predecessors, (697), 85 states have call successors, (697) [2021-11-03 05:47:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1936 transitions. [2021-11-03 05:47:15,708 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1936 transitions. Word has length 42 [2021-11-03 05:47:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:15,708 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1936 transitions. [2021-11-03 05:47:15,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1936 transitions. [2021-11-03 05:47:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:47:15,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:15,713 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:15,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:15,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:15,935 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1828765838, now seen corresponding path program 1 times [2021-11-03 05:47:15,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:15,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447039207] [2021-11-03 05:47:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:15,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:15,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:15,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:47:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:47:16,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:16,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:47:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:47:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:16,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:16,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:16,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447039207] [2021-11-03 05:47:16,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447039207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:16,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:16,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-03 05:47:16,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650622438] [2021-11-03 05:47:16,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:47:16,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:47:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:47:16,757 INFO L87 Difference]: Start difference. First operand 1137 states and 1936 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (7), 4 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:36,860 INFO L93 Difference]: Finished difference Result 2297 states and 4565 transitions. [2021-11-03 05:47:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:47:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (7), 4 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 05:47:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:36,907 INFO L225 Difference]: With dead ends: 2297 [2021-11-03 05:47:36,907 INFO L226 Difference]: Without dead ends: 1220 [2021-11-03 05:47:36,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:47:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-11-03 05:47:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1204. [2021-11-03 05:47:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 957 states have (on average 1.2549634273772206) internal successors, (1201), 916 states have internal predecessors, (1201), 101 states have call successors, (101), 70 states have call predecessors, (101), 145 states have return successors, (738), 217 states have call predecessors, (738), 90 states have call successors, (738) [2021-11-03 05:47:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2040 transitions. [2021-11-03 05:47:37,102 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2040 transitions. Word has length 42 [2021-11-03 05:47:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:37,103 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 2040 transitions. [2021-11-03 05:47:37,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (7), 4 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2040 transitions. [2021-11-03 05:47:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 05:47:37,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:37,109 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:37,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:37,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:37,324 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:47:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash -757221373, now seen corresponding path program 1 times [2021-11-03 05:47:37,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:37,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627291814] [2021-11-03 05:47:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:37,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:37,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:37,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:37,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:47:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:37,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:47:37,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:37,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:47:37,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 05:47:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:38,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:38,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:38,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627291814] [2021-11-03 05:47:38,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627291814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:38,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:38,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-03 05:47:38,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723181348] [2021-11-03 05:47:38,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:47:38,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:47:38,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:47:38,287 INFO L87 Difference]: Start difference. First operand 1204 states and 2040 transitions. Second operand has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 7 states have internal predecessors, (43), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:08,402 INFO L93 Difference]: Finished difference Result 2495 states and 5026 transitions. [2021-11-03 05:48:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:48:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 7 states have internal predecessors, (43), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-03 05:48:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:08,424 INFO L225 Difference]: With dead ends: 2495 [2021-11-03 05:48:08,424 INFO L226 Difference]: Without dead ends: 1314 [2021-11-03 05:48:08,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:48:08,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-11-03 05:48:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1249. [2021-11-03 05:48:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 999 states have (on average 1.2492492492492493) internal successors, (1248), 957 states have internal predecessors, (1248), 102 states have call successors, (102), 75 states have call predecessors, (102), 147 states have return successors, (742), 216 states have call predecessors, (742), 91 states have call successors, (742) [2021-11-03 05:48:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2092 transitions. [2021-11-03 05:48:08,543 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2092 transitions. Word has length 43 [2021-11-03 05:48:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:08,544 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 2092 transitions. [2021-11-03 05:48:08,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 7 states have internal predecessors, (43), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2092 transitions. [2021-11-03 05:48:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 05:48:08,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:08,548 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:08,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:08,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:08,766 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:08,766 INFO L85 PathProgramCache]: Analyzing trace with hash 204385454, now seen corresponding path program 1 times [2021-11-03 05:48:08,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:08,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661543884] [2021-11-03 05:48:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:08,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:08,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:08,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:08,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:48:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:09,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:48:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:48:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:48:09,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:09,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-03 05:48:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:48:09,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:09,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661543884] [2021-11-03 05:48:09,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661543884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:09,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:09,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-03 05:48:09,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661951477] [2021-11-03 05:48:09,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:48:09,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:48:09,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:48:09,976 INFO L87 Difference]: Start difference. First operand 1249 states and 2092 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-03 05:48:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:37,627 INFO L93 Difference]: Finished difference Result 3213 states and 6979 transitions. [2021-11-03 05:48:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:48:37,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2021-11-03 05:48:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:37,675 INFO L225 Difference]: With dead ends: 3213 [2021-11-03 05:48:37,675 INFO L226 Difference]: Without dead ends: 1977 [2021-11-03 05:48:37,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:48:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-11-03 05:48:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1947. [2021-11-03 05:48:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1548 states have (on average 1.1828165374677002) internal successors, (1831), 1431 states have internal predecessors, (1831), 113 states have call successors, (113), 72 states have call predecessors, (113), 285 states have return successors, (2081), 443 states have call predecessors, (2081), 111 states have call successors, (2081) [2021-11-03 05:48:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 4025 transitions. [2021-11-03 05:48:37,953 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 4025 transitions. Word has length 46 [2021-11-03 05:48:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:37,953 INFO L470 AbstractCegarLoop]: Abstraction has 1947 states and 4025 transitions. [2021-11-03 05:48:37,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-03 05:48:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 4025 transitions. [2021-11-03 05:48:37,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 05:48:37,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:37,958 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:37,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 05:48:38,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:38,176 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1846598544, now seen corresponding path program 1 times [2021-11-03 05:48:38,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:38,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038182900] [2021-11-03 05:48:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:38,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:38,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:38,179 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:38,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:48:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:48:38,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:39,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:39,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:39,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038182900] [2021-11-03 05:48:39,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038182900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:39,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:39,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:48:39,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837737109] [2021-11-03 05:48:39,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:48:39,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:48:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:48:39,313 INFO L87 Difference]: Start difference. First operand 1947 states and 4025 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:48:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:39,477 INFO L93 Difference]: Finished difference Result 3934 states and 10691 transitions. [2021-11-03 05:48:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:48:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-03 05:48:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:39,531 INFO L225 Difference]: With dead ends: 3934 [2021-11-03 05:48:39,532 INFO L226 Difference]: Without dead ends: 1998 [2021-11-03 05:48:39,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:48:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-11-03 05:48:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1951. [2021-11-03 05:48:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1551 states have (on average 1.182462927143778) internal successors, (1834), 1434 states have internal predecessors, (1834), 113 states have call successors, (113), 72 states have call predecessors, (113), 286 states have return successors, (2084), 444 states have call predecessors, (2084), 111 states have call successors, (2084) [2021-11-03 05:48:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 4031 transitions. [2021-11-03 05:48:39,961 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 4031 transitions. Word has length 46 [2021-11-03 05:48:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:39,961 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 4031 transitions. [2021-11-03 05:48:39,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:48:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 4031 transitions. [2021-11-03 05:48:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-03 05:48:39,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:39,965 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:39,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:40,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:40,190 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 214285764, now seen corresponding path program 1 times [2021-11-03 05:48:40,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:40,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445611887] [2021-11-03 05:48:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:40,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:40,192 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:40,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:48:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:48:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:40,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:41,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:41,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445611887] [2021-11-03 05:48:41,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445611887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:41,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:41,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:48:41,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309784253] [2021-11-03 05:48:41,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:48:41,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:41,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:48:41,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:48:41,103 INFO L87 Difference]: Start difference. First operand 1951 states and 4031 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:48:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:41,293 INFO L93 Difference]: Finished difference Result 3940 states and 10699 transitions. [2021-11-03 05:48:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:48:41,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-03 05:48:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:41,328 INFO L225 Difference]: With dead ends: 3940 [2021-11-03 05:48:41,328 INFO L226 Difference]: Without dead ends: 2000 [2021-11-03 05:48:41,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:48:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-11-03 05:48:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1953. [2021-11-03 05:48:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1553 states have (on average 1.1822279459111398) internal successors, (1836), 1435 states have internal predecessors, (1836), 113 states have call successors, (113), 72 states have call predecessors, (113), 286 states have return successors, (2084), 445 states have call predecessors, (2084), 111 states have call successors, (2084) [2021-11-03 05:48:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4033 transitions. [2021-11-03 05:48:41,567 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4033 transitions. Word has length 47 [2021-11-03 05:48:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:41,567 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 4033 transitions. [2021-11-03 05:48:41,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:48:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4033 transitions. [2021-11-03 05:48:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 05:48:41,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:41,572 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:41,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:41,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:41,790 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:41,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:41,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1192209372, now seen corresponding path program 1 times [2021-11-03 05:48:41,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:41,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432980974] [2021-11-03 05:48:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:41,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:41,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:41,793 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:41,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:48:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:42,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:48:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:42,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:42,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:42,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432980974] [2021-11-03 05:48:42,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432980974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:42,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:42,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:48:42,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718892734] [2021-11-03 05:48:42,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:42,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:42,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:42,749 INFO L87 Difference]: Start difference. First operand 1953 states and 4033 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:48:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:42,927 INFO L93 Difference]: Finished difference Result 4038 states and 11068 transitions. [2021-11-03 05:48:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:42,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-03 05:48:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:42,976 INFO L225 Difference]: With dead ends: 4038 [2021-11-03 05:48:42,976 INFO L226 Difference]: Without dead ends: 2096 [2021-11-03 05:48:43,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:43,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-11-03 05:48:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2027. [2021-11-03 05:48:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 1601 states have (on average 1.1673953778888195) internal successors, (1869), 1493 states have internal predecessors, (1869), 123 states have call successors, (123), 72 states have call predecessors, (123), 302 states have return successors, (2440), 461 states have call predecessors, (2440), 121 states have call successors, (2440) [2021-11-03 05:48:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 4432 transitions. [2021-11-03 05:48:43,377 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 4432 transitions. Word has length 48 [2021-11-03 05:48:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:43,377 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 4432 transitions. [2021-11-03 05:48:43,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:48:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 4432 transitions. [2021-11-03 05:48:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-03 05:48:43,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:43,384 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:43,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:43,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:43,603 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:48:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1407247106, now seen corresponding path program 1 times [2021-11-03 05:48:43,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:43,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863900013] [2021-11-03 05:48:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:43,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:43,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:43,605 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:48:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:48:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:44,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:48:44,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-03 05:48:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:44,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:48:44,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:44,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863900013] [2021-11-03 05:48:44,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863900013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:44,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:44,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 05:48:44,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390570638] [2021-11-03 05:48:44,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:48:44,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:44,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:48:44,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:48:44,755 INFO L87 Difference]: Start difference. First operand 2027 states and 4432 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:49:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:08,557 INFO L93 Difference]: Finished difference Result 4188 states and 11890 transitions. [2021-11-03 05:49:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:49:08,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-03 05:49:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:08,599 INFO L225 Difference]: With dead ends: 4188 [2021-11-03 05:49:08,600 INFO L226 Difference]: Without dead ends: 2172 [2021-11-03 05:49:08,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:49:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-11-03 05:49:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2124. [2021-11-03 05:49:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 1687 states have (on average 1.1831653823355068) internal successors, (1996), 1581 states have internal predecessors, (1996), 124 states have call successors, (124), 81 states have call predecessors, (124), 312 states have return successors, (2456), 461 states have call predecessors, (2456), 122 states have call successors, (2456) [2021-11-03 05:49:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 4576 transitions. [2021-11-03 05:49:08,852 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 4576 transitions. Word has length 49 [2021-11-03 05:49:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:08,853 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 4576 transitions. [2021-11-03 05:49:08,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:49:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 4576 transitions. [2021-11-03 05:49:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:49:08,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:08,859 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:08,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:09,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:09,076 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:49:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash 398525650, now seen corresponding path program 1 times [2021-11-03 05:49:09,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:09,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753012586] [2021-11-03 05:49:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:09,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:09,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:09,079 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:09,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:49:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:49:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:49:10,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-03 05:49:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:10,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:10,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:10,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753012586] [2021-11-03 05:49:10,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753012586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:10,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:10,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 05:49:10,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468671947] [2021-11-03 05:49:10,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:49:10,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:49:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:49:10,286 INFO L87 Difference]: Start difference. First operand 2124 states and 4576 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-03 05:49:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:28,795 INFO L93 Difference]: Finished difference Result 4234 states and 11626 transitions. [2021-11-03 05:49:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:49:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-11-03 05:49:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:28,830 INFO L225 Difference]: With dead ends: 4234 [2021-11-03 05:49:28,830 INFO L226 Difference]: Without dead ends: 2121 [2021-11-03 05:49:28,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:49:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-11-03 05:49:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2108. [2021-11-03 05:49:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1673 states have (on average 1.1769276748356245) internal successors, (1969), 1570 states have internal predecessors, (1969), 126 states have call successors, (126), 81 states have call predecessors, (126), 308 states have return successors, (2513), 456 states have call predecessors, (2513), 124 states have call successors, (2513) [2021-11-03 05:49:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 4608 transitions. [2021-11-03 05:49:29,092 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 4608 transitions. Word has length 50 [2021-11-03 05:49:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:29,093 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 4608 transitions. [2021-11-03 05:49:29,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-03 05:49:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 4608 transitions. [2021-11-03 05:49:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:49:29,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:29,099 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:29,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:29,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:29,319 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:49:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1652458348, now seen corresponding path program 1 times [2021-11-03 05:49:29,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:29,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598060865] [2021-11-03 05:49:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:29,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:29,321 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:29,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:49:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:29,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:49:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:30,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:49:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:49:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:49:30,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:49:30,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:30,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598060865] [2021-11-03 05:49:30,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598060865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:30,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:30,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-03 05:49:30,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965828320] [2021-11-03 05:49:30,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:49:30,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:49:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:49:30,612 INFO L87 Difference]: Start difference. First operand 2108 states and 4608 transitions. Second operand has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 5 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:50:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:00,054 INFO L93 Difference]: Finished difference Result 4301 states and 12326 transitions. [2021-11-03 05:50:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:50:00,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 5 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-03 05:50:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:00,105 INFO L225 Difference]: With dead ends: 4301 [2021-11-03 05:50:00,106 INFO L226 Difference]: Without dead ends: 2204 [2021-11-03 05:50:00,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:50:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-11-03 05:50:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2195. [2021-11-03 05:50:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 1743 states have (on average 1.1853126792885829) internal successors, (2066), 1646 states have internal predecessors, (2066), 132 states have call successors, (132), 87 states have call predecessors, (132), 319 states have return successors, (2697), 461 states have call predecessors, (2697), 130 states have call successors, (2697) [2021-11-03 05:50:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4895 transitions. [2021-11-03 05:50:00,343 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4895 transitions. Word has length 50 [2021-11-03 05:50:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:00,344 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 4895 transitions. [2021-11-03 05:50:00,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 5 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 05:50:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4895 transitions. [2021-11-03 05:50:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:50:00,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:00,352 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:50:00,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:00,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:00,571 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:50:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash -103288946, now seen corresponding path program 1 times [2021-11-03 05:50:00,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:00,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366997942] [2021-11-03 05:50:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:00,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:00,574 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:00,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:50:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:01,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:50:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:01,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:50:01,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:01,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:01,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:50:01,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:01,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366997942] [2021-11-03 05:50:01,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366997942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:50:01,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091774347] [2021-11-03 05:50:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:01,879 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:01,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:50:01,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:50:01,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 05:50:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:50:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:02,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:50:02,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-03 05:50:03,229 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-03 05:50:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-11-03 05:50:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:50:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2021-11-03 05:50:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:50:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1091774347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:50:03,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467431837] [2021-11-03 05:50:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:03,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:50:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:50:03,698 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:50:03,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 05:50:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:04,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:50:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:04,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:50:04,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:04,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:50:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:50:04,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467431837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:50:04,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:50:04,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 6, 6, 6] total 14 [2021-11-03 05:50:04,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584295933] [2021-11-03 05:50:04,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 05:50:04,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 05:50:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:50:04,987 INFO L87 Difference]: Start difference. First operand 2195 states and 4895 transitions. Second operand has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-03 05:50:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:54,945 INFO L93 Difference]: Finished difference Result 7535 states and 25410 transitions. [2021-11-03 05:50:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-03 05:50:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2021-11-03 05:50:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:55,027 INFO L225 Difference]: With dead ends: 7535 [2021-11-03 05:50:55,027 INFO L226 Difference]: Without dead ends: 5350 [2021-11-03 05:50:55,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-11-03 05:50:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2021-11-03 05:50:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 5178. [2021-11-03 05:50:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 4127 states have (on average 1.1235764477828931) internal successors, (4637), 3699 states have internal predecessors, (4637), 233 states have call successors, (233), 139 states have call predecessors, (233), 817 states have return successors, (10636), 1339 states have call predecessors, (10636), 230 states have call successors, (10636) [2021-11-03 05:50:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 15506 transitions. [2021-11-03 05:50:55,904 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 15506 transitions. Word has length 54 [2021-11-03 05:50:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:55,905 INFO L470 AbstractCegarLoop]: Abstraction has 5178 states and 15506 transitions. [2021-11-03 05:50:55,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-03 05:50:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 15506 transitions. [2021-11-03 05:50:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:50:55,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:55,915 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:50:55,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:56,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:56,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-03 05:50:56,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:50:56,536 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:50:56,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1327114492, now seen corresponding path program 1 times [2021-11-03 05:50:56,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:56,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928677276] [2021-11-03 05:50:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:56,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:56,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:56,540 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:56,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:50:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:50:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:57,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:50:57,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:50:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:50:57,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:50:57,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:57,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928677276] [2021-11-03 05:50:57,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928677276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:57,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:50:57,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-03 05:50:57,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089338369] [2021-11-03 05:50:57,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:50:57,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:50:57,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:50:57,675 INFO L87 Difference]: Start difference. First operand 5178 states and 15506 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (10), 4 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:20,511 INFO L93 Difference]: Finished difference Result 10490 states and 41536 transitions. [2021-11-03 05:51:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:51:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (10), 4 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 05:51:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:20,607 INFO L225 Difference]: With dead ends: 10490 [2021-11-03 05:51:20,608 INFO L226 Difference]: Without dead ends: 5327 [2021-11-03 05:51:20,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:51:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2021-11-03 05:51:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 5315. [2021-11-03 05:51:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 4221 states have (on average 1.1220090026060174) internal successors, (4736), 3798 states have internal predecessors, (4736), 236 states have call successors, (236), 140 states have call predecessors, (236), 857 states have return successors, (10744), 1376 states have call predecessors, (10744), 233 states have call successors, (10744) [2021-11-03 05:51:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 15716 transitions. [2021-11-03 05:51:21,742 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 15716 transitions. Word has length 56 [2021-11-03 05:51:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:21,742 INFO L470 AbstractCegarLoop]: Abstraction has 5315 states and 15716 transitions. [2021-11-03 05:51:21,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (10), 4 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 15716 transitions. [2021-11-03 05:51:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:51:21,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:21,752 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:21,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:21,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:21,973 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:51:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1709178951, now seen corresponding path program 1 times [2021-11-03 05:51:21,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:21,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174412153] [2021-11-03 05:51:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:21,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:21,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:21,976 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:21,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 05:51:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:51:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:22,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:51:22,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 05:51:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:51:23,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:51:23,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:23,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174412153] [2021-11-03 05:51:23,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174412153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:23,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:23,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-03 05:51:23,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055982669] [2021-11-03 05:51:23,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:51:23,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:51:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:51:23,320 INFO L87 Difference]: Start difference. First operand 5315 states and 15716 transitions. Second operand has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 6 states have call successors, (13), 6 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:53,028 INFO L93 Difference]: Finished difference Result 10507 states and 41455 transitions. [2021-11-03 05:51:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:51:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 6 states have call successors, (13), 6 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:51:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:53,111 INFO L225 Difference]: With dead ends: 10507 [2021-11-03 05:51:53,111 INFO L226 Difference]: Without dead ends: 5207 [2021-11-03 05:51:53,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:51:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2021-11-03 05:51:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 5203. [2021-11-03 05:51:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 4146 states have (on average 1.1234925229136516) internal successors, (4658), 3722 states have internal predecessors, (4658), 234 states have call successors, (234), 140 states have call predecessors, (234), 822 states have return successors, (10637), 1340 states have call predecessors, (10637), 231 states have call successors, (10637) [2021-11-03 05:51:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 15529 transitions. [2021-11-03 05:51:54,165 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 15529 transitions. Word has length 57 [2021-11-03 05:51:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:54,166 INFO L470 AbstractCegarLoop]: Abstraction has 5203 states and 15529 transitions. [2021-11-03 05:51:54,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 6 states have call successors, (13), 6 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 15529 transitions. [2021-11-03 05:51:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:51:54,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:54,176 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:54,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:54,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:54,392 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:51:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1385684304, now seen corresponding path program 1 times [2021-11-03 05:51:54,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:54,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983189060] [2021-11-03 05:51:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:54,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:54,396 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:54,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:51:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:51:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:51:55,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:51:55,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:55,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983189060] [2021-11-03 05:51:55,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983189060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:55,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:55,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:51:55,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708860457] [2021-11-03 05:51:55,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:51:55,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:51:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:51:55,504 INFO L87 Difference]: Start difference. First operand 5203 states and 15529 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:55,832 INFO L93 Difference]: Finished difference Result 10397 states and 41227 transitions. [2021-11-03 05:51:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:51:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:51:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:55,943 INFO L225 Difference]: With dead ends: 10397 [2021-11-03 05:51:55,943 INFO L226 Difference]: Without dead ends: 5209 [2021-11-03 05:51:56,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:51:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-11-03 05:51:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 5203. [2021-11-03 05:51:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 4146 states have (on average 1.1193921852387845) internal successors, (4641), 3722 states have internal predecessors, (4641), 234 states have call successors, (234), 140 states have call predecessors, (234), 822 states have return successors, (10637), 1340 states have call predecessors, (10637), 231 states have call successors, (10637) [2021-11-03 05:51:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 15512 transitions. [2021-11-03 05:51:56,949 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 15512 transitions. Word has length 57 [2021-11-03 05:51:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:56,949 INFO L470 AbstractCegarLoop]: Abstraction has 5203 states and 15512 transitions. [2021-11-03 05:51:56,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 15512 transitions. [2021-11-03 05:51:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:51:56,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:56,961 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:56,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:57,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:57,182 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:51:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 171104757, now seen corresponding path program 1 times [2021-11-03 05:51:57,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:57,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888513785] [2021-11-03 05:51:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:57,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:57,185 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:57,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-03 05:51:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:58,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:51:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:58,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:51:58,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:51:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:51:58,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:51:58,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:58,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888513785] [2021-11-03 05:51:58,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888513785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:58,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:58,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-03 05:51:58,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276732579] [2021-11-03 05:51:58,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:51:58,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:58,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:51:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:51:58,843 INFO L87 Difference]: Start difference. First operand 5203 states and 15512 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (12), 4 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:52:25,344 INFO L93 Difference]: Finished difference Result 12942 states and 60357 transitions. [2021-11-03 05:52:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:52:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (12), 4 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 05:52:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:52:25,623 INFO L225 Difference]: With dead ends: 12942 [2021-11-03 05:52:25,623 INFO L226 Difference]: Without dead ends: 7754 [2021-11-03 05:52:25,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:52:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2021-11-03 05:52:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 7709. [2021-11-03 05:52:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 6151 states have (on average 1.1151032352463015) internal successors, (6859), 5461 states have internal predecessors, (6859), 327 states have call successors, (327), 192 states have call predecessors, (327), 1230 states have return successors, (23183), 2055 states have call predecessors, (23183), 324 states have call successors, (23183) [2021-11-03 05:52:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 30369 transitions. [2021-11-03 05:52:27,256 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 30369 transitions. Word has length 58 [2021-11-03 05:52:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:52:27,256 INFO L470 AbstractCegarLoop]: Abstraction has 7709 states and 30369 transitions. [2021-11-03 05:52:27,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (12), 4 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 30369 transitions. [2021-11-03 05:52:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 05:52:27,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:52:27,271 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:52:27,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:27,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:52:27,484 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:52:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:52:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1158798581, now seen corresponding path program 1 times [2021-11-03 05:52:27,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:52:27,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788240625] [2021-11-03 05:52:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:27,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:52:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:52:27,487 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:52:27,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 05:52:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:28,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 05:52:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:29,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-11-03 05:52:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:52:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:52:30,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:52:30,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788240625] [2021-11-03 05:52:30,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788240625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:30,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2072676128] [2021-11-03 05:52:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:30,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:52:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:52:30,512 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:52:30,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 05:52:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:31,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:52:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:32,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-03 05:52:32,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-03 05:52:32,870 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-03 05:52:32,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-11-03 05:52:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:52:32,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:52:33,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2072676128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:33,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844560168] [2021-11-03 05:52:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:33,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:52:33,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:52:33,652 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:52:33,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-03 05:52:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:34,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:52:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:35,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-03 05:52:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:52:35,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:52:35,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844560168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:35,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:52:35,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10, 7, 7, 7] total 26 [2021-11-03 05:52:35,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555227100] [2021-11-03 05:52:35,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-03 05:52:35,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:52:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-03 05:52:35,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-11-03 05:52:35,562 INFO L87 Difference]: Start difference. First operand 7709 states and 30369 transitions. Second operand has 26 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-03 05:53:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:53:39,103 INFO L93 Difference]: Finished difference Result 18801 states and 104583 transitions. [2021-11-03 05:53:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-03 05:53:39,104 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2021-11-03 05:53:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:53:39,422 INFO L225 Difference]: With dead ends: 18801 [2021-11-03 05:53:39,422 INFO L226 Difference]: Without dead ends: 11008 [2021-11-03 05:53:39,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=770, Invalid=3131, Unknown=5, NotChecked=0, Total=3906 [2021-11-03 05:53:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2021-11-03 05:53:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 10217. [2021-11-03 05:53:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 8059 states have (on average 1.0883484303263433) internal successors, (8771), 7718 states have internal predecessors, (8771), 353 states have call successors, (353), 202 states have call predecessors, (353), 1804 states have return successors, (33714), 2296 states have call predecessors, (33714), 350 states have call successors, (33714) [2021-11-03 05:53:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 42838 transitions. [2021-11-03 05:53:41,973 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 42838 transitions. Word has length 74 [2021-11-03 05:53:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:53:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 10217 states and 42838 transitions. [2021-11-03 05:53:41,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-03 05:53:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 42838 transitions. [2021-11-03 05:53:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:53:41,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:53:41,999 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:53:42,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-03 05:53:42,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:42,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-03 05:53:42,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:53:42,622 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:53:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:53:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1099686263, now seen corresponding path program 1 times [2021-11-03 05:53:42,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:53:42,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937686835] [2021-11-03 05:53:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:42,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:53:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:53:42,625 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:53:42,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffc999a8-10f9-4e96-a182-5b7aff567c7c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-03 05:53:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:44,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-03 05:53:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:44,847 INFO L354 Elim1Store]: treesize reduction 13, result has 35.0 percent of original size [2021-11-03 05:53:44,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2021-11-03 05:53:44,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:44,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:59,369 WARN L207 SmtUtils]: Spent 14.43 s on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2021-11-03 05:53:59,370 INFO L354 Elim1Store]: treesize reduction 331, result has 8.6 percent of original size [2021-11-03 05:53:59,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 382 treesize of output 320 [2021-11-03 05:53:59,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:53:59,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 396 [2021-11-03 05:53:59,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 367 [2021-11-03 05:53:59,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:59,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:53:59,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 272 [2021-11-03 05:54:00,783 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-11-03 05:54:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 262 [2021-11-03 05:54:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:00,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 217 [2021-11-03 05:54:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 198 [2021-11-03 05:54:00,816 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 05:54:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:00,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 179 [2021-11-03 05:54:00,838 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:00,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 05:54:00,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 221 [2021-11-03 05:54:00,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:00,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:54:00,978 INFO L354 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2021-11-03 05:54:00,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 189 [2021-11-03 05:54:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:00,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:00,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 161 [2021-11-03 05:54:00,999 INFO L883 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 05:54:01,099 INFO L354 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2021-11-03 05:54:01,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 151 [2021-11-03 05:54:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 137 [2021-11-03 05:54:01,167 INFO L354 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2021-11-03 05:54:01,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 136 [2021-11-03 05:54:01,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 118 [2021-11-03 05:54:01,219 INFO L354 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2021-11-03 05:54:01,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 117 [2021-11-03 05:54:01,221 INFO L883 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 05:54:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 99 [2021-11-03 05:54:01,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 101 [2021-11-03 05:54:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 120 [2021-11-03 05:54:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:54:01,540 INFO L354 Elim1Store]: treesize reduction 226, result has 11.4 percent of original size [2021-11-03 05:54:01,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 129 treesize of output 143 [2021-11-03 05:54:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:01,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 113 [2021-11-03 05:54:01,583 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-11-03 05:54:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 108 [2021-11-03 05:54:01,591 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 05:54:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:54:02,881 INFO L354 Elim1Store]: treesize reduction 260, result has 10.0 percent of original size [2021-11-03 05:54:02,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 131 treesize of output 141 [2021-11-03 05:54:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2021-11-03 05:54:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:54:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 86 [2021-11-03 05:54:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-11-03 05:54:03,320 INFO L354 Elim1Store]: treesize reduction 95, result has 4.0 percent of original size [2021-11-03 05:54:03,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 34 [2021-11-03 05:54:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:54:03,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:03,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:03,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:54:03,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:03,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-03 05:54:03,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:03,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-03 05:54:03,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:03,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-03 05:54:21,626 WARN L207 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-11-03 05:54:21,627 INFO L354 Elim1Store]: treesize reduction 6, result has 87.2 percent of original size [2021-11-03 05:54:21,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 352908 treesize of output 351605 [2021-11-03 05:54:28,322 WARN L207 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 979 DAG size of output: 971 [2021-11-03 05:54:29,674 INFO L180 QuantifierPusher]: treesize reduction 108, result has 100.0 percent of original size [2021-11-03 05:54:30,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 486057 [2021-11-03 05:54:32,043 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:32,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 559307 [2021-11-03 05:54:33,886 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:54:34,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 603253 [2021-11-03 05:54:35,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size