./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P --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 7c94686873332081feb3318888667bc0ece98ccb66d8096416ad72e068ccd16c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:46,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:46,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:46,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:46,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:46,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:46,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:46,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:46,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:46,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:46,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:46,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:46,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:46,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:46,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:46,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:46,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:46,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:46,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:46,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:46,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:46,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:46,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:46,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:46,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:46,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:46,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:46,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:46,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:46,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:46,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:46,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:46,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:46,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:46,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:46,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:46,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:46,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:46,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:46,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:46,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:46,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:13:46,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:46,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:46,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:46,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:46,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:46,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:46,127 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:46,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:46,127 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:46,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:13:46,128 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:46,128 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:46,128 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:13:46,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:13:46,129 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:46,129 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:13:46,129 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:13:46,129 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:13:46,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:46,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:13:46,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:13:46,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:13:46,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:46,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:13:46,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:46,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:13:46,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:13:46,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:13:46,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:46,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:13:46,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:46,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:46,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:46,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:46,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:46,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:13:46,134 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:13:46,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:13:46,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:13:46,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:46,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:46,135 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_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c94686873332081feb3318888667bc0ece98ccb66d8096416ad72e068ccd16c [2021-11-20 23:13:46,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:46,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:46,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:46,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:46,465 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:46,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c [2021-11-20 23:13:46,567 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/51c1ad4ee/581065cd2ea5400ab449d3f40605f09c/FLAGd5ff2462c [2021-11-20 23:13:47,074 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:47,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c [2021-11-20 23:13:47,089 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/51c1ad4ee/581065cd2ea5400ab449d3f40605f09c/FLAGd5ff2462c [2021-11-20 23:13:47,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/51c1ad4ee/581065cd2ea5400ab449d3f40605f09c [2021-11-20 23:13:47,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:47,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:47,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:47,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:47,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:47,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e1c0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47, skipping insertion in model container [2021-11-20 23:13:47,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:47,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:47,643 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c[709,722] [2021-11-20 23:13:47,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:47,676 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:47,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c[709,722] [2021-11-20 23:13:47,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:47,717 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:47,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47 WrapperNode [2021-11-20 23:13:47,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:47,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:47,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:47,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:47,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,757 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2021-11-20 23:13:47,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:47,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:47,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:47,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:47,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:47,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:47,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:47,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:47,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:47,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:47,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:47,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:13:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:47,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:13:47,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:13:47,926 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:47,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:48,057 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:48,072 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:48,072 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:13:48,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:48 BoogieIcfgContainer [2021-11-20 23:13:48,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:48,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:48,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:48,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:48,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:47" (1/3) ... [2021-11-20 23:13:48,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b58e096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:48, skipping insertion in model container [2021-11-20 23:13:48,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47" (2/3) ... [2021-11-20 23:13:48,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b58e096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:48, skipping insertion in model container [2021-11-20 23:13:48,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:48" (3/3) ... [2021-11-20 23:13:48,104 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound10.c [2021-11-20 23:13:48,109 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:48,110 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:13:48,209 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:48,217 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 [2021-11-20 23:13:48,218 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:13:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:13:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:13:48,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:48,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:13:48,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2021-11-20 23:13:48,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:48,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802782914] [2021-11-20 23:13:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:48,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:48,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802782914] [2021-11-20 23:13:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802782914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:48,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:48,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:13:48,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910000308] [2021-11-20 23:13:48,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:48,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:13:48,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:48,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:13:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:13:48,578 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:48,631 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2021-11-20 23:13:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:13:48,634 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:13:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:48,643 INFO L225 Difference]: With dead ends: 35 [2021-11-20 23:13:48,644 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 23:13:48,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:13:48,658 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:48,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 23:13:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-20 23:13:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:13:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-11-20 23:13:48,723 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2021-11-20 23:13:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:48,724 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-20 23:13:48,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-11-20 23:13:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:13:48,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:48,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:48,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:13:48,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2021-11-20 23:13:48,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:48,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768115809] [2021-11-20 23:13:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:48,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:48,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:48,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768115809] [2021-11-20 23:13:48,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768115809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:48,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:48,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:48,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696672175] [2021-11-20 23:13:48,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:48,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:48,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:48,854 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:48,888 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-20 23:13:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:48,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:13:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:48,890 INFO L225 Difference]: With dead ends: 27 [2021-11-20 23:13:48,890 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 23:13:48,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:48,897 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:48,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 23:13:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-20 23:13:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:13:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-20 23:13:48,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2021-11-20 23:13:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:48,919 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-20 23:13:48,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-20 23:13:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:13:48,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:48,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:48,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:13:48,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2021-11-20 23:13:48,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:48,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730324090] [2021-11-20 23:13:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:48,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:48,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:13:48,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066008724] [2021-11-20 23:13:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:48,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:48,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:48,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:48,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:13:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:13:49,025 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:13:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:13:49,059 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 23:13:49,059 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:13:49,060 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:13:49,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:49,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:49,281 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-20 23:13:49,285 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:13:49,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:13:49 BoogieIcfgContainer [2021-11-20 23:13:49,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:13:49,322 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:13:49,323 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:13:49,323 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:13:49,324 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:48" (3/4) ... [2021-11-20 23:13:49,326 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 23:13:49,326 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:13:49,327 INFO L158 Benchmark]: Toolchain (without parser) took 1911.77ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 55.3MB in the beginning and 95.0MB in the end (delta: -39.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:49,327 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory was 40.8MB in the beginning and 40.7MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:49,329 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.73ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 55.0MB in the beginning and 96.6MB in the end (delta: -41.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:13:49,332 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.82ms. Allocated memory is still 121.6MB. Free memory was 96.6MB in the beginning and 94.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:13:49,333 INFO L158 Benchmark]: Boogie Preprocessor took 23.97ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 93.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:49,335 INFO L158 Benchmark]: RCFGBuilder took 291.72ms. Allocated memory is still 121.6MB. Free memory was 93.5MB in the beginning and 84.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:13:49,335 INFO L158 Benchmark]: TraceAbstraction took 1239.20ms. Allocated memory is still 121.6MB. Free memory was 83.5MB in the beginning and 95.0MB in the end (delta: -11.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:49,335 INFO L158 Benchmark]: Witness Printer took 4.13ms. Allocated memory is still 121.6MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:13:49,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory was 40.8MB in the beginning and 40.7MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 300.73ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 55.0MB in the beginning and 96.6MB in the end (delta: -41.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.82ms. Allocated memory is still 121.6MB. Free memory was 96.6MB in the beginning and 94.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.97ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 93.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 291.72ms. Allocated memory is still 121.6MB. Free memory was 93.5MB in the beginning and 84.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1239.20ms. Allocated memory is still 121.6MB. Free memory was 83.5MB in the beginning and 95.0MB in the end (delta: -11.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.13ms. Allocated memory is still 121.6MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 41 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-20 23:13:49,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/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_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P --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 7c94686873332081feb3318888667bc0ece98ccb66d8096416ad72e068ccd16c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:51,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:51,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:51,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:51,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:51,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:51,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:51,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:51,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:51,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:51,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:51,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:51,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:51,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:51,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:51,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:51,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:51,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:51,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:51,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:51,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:51,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:51,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:51,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:51,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:51,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:51,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:51,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:51,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:51,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:51,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:51,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:51,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:51,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:51,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:51,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:51,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:51,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:51,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:51,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:51,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:51,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 23:13:51,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:51,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:51,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:51,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:51,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:51,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:51,979 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:51,979 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:51,979 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:51,980 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:51,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:51,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:51,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:51,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:13:51,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:13:51,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:51,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:13:51,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:51,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:13:51,982 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:13:51,982 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:13:51,983 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:13:51,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:13:51,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:51,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:13:51,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:51,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:13:51,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:51,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:51,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:51,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:51,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:13:51,994 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:13:51,994 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:13:51,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:13:51,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:51,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:51,995 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_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c94686873332081feb3318888667bc0ece98ccb66d8096416ad72e068ccd16c [2021-11-20 23:13:52,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:52,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:52,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:52,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:52,419 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:52,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c [2021-11-20 23:13:52,492 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/a6495f46d/dfd0f9eb94e9433e8b9792a4f70b4841/FLAG39d67fc55 [2021-11-20 23:13:52,927 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:52,927 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c [2021-11-20 23:13:52,935 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/a6495f46d/dfd0f9eb94e9433e8b9792a4f70b4841/FLAG39d67fc55 [2021-11-20 23:13:52,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/data/a6495f46d/dfd0f9eb94e9433e8b9792a4f70b4841 [2021-11-20 23:13:52,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:52,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:52,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:52,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:52,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:52,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:52" (1/1) ... [2021-11-20 23:13:52,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b1018f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52, skipping insertion in model container [2021-11-20 23:13:52,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:52" (1/1) ... [2021-11-20 23:13:52,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:52,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:53,134 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c[709,722] [2021-11-20 23:13:53,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:53,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:53,214 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound10.c[709,722] [2021-11-20 23:13:53,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:53,241 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:53,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53 WrapperNode [2021-11-20 23:13:53,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:53,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:53,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:53,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:53,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,278 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-11-20 23:13:53,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:53,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:53,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:53,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:53,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:53,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:53,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:53,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:53,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (1/1) ... [2021-11-20 23:13:53,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:53,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:53,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:13:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:53,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:53,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:13:53,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:13:53,495 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:53,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:56,080 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:56,086 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:56,086 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:13:56,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:56 BoogieIcfgContainer [2021-11-20 23:13:56,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:56,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:56,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:56,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:56,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:52" (1/3) ... [2021-11-20 23:13:56,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4309575c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:56, skipping insertion in model container [2021-11-20 23:13:56,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:53" (2/3) ... [2021-11-20 23:13:56,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4309575c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:56, skipping insertion in model container [2021-11-20 23:13:56,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:56" (3/3) ... [2021-11-20 23:13:56,098 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound10.c [2021-11-20 23:13:56,103 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:56,103 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:13:56,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:56,160 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 [2021-11-20 23:13:56,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:13:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:13:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:13:56,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:56,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:56,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2021-11-20 23:13:56,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:56,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643279799] [2021-11-20 23:13:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:56,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:56,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:56,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:56,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:13:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 23:13:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:56,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:56,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:56,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643279799] [2021-11-20 23:13:56,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643279799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:56,576 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:56,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:13:56,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431120490] [2021-11-20 23:13:56,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:56,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:13:56,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:13:56,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:13:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:13:56,614 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:56,633 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2021-11-20 23:13:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:13:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:13:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:56,642 INFO L225 Difference]: With dead ends: 40 [2021-11-20 23:13:56,642 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 23:13:56,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:13:56,653 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:56,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:13:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 23:13:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 23:13:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:13:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-20 23:13:56,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2021-11-20 23:13:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:56,688 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-20 23:13:56,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-20 23:13:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:13:56,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:56,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:56,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-20 23:13:56,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:13:56,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2021-11-20 23:13:56,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:13:56,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399717968] [2021-11-20 23:13:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:56,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:13:56,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:13:56,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:13:56,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:13:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:13:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:57,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:57,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:13:57,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399717968] [2021-11-20 23:13:57,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399717968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:57,257 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:57,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:13:57,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750169579] [2021-11-20 23:13:57,258 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:57,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:57,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:13:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:57,261 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:59,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:01,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:03,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:06,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:08,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:11,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:14,119 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:16,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:16,583 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-11-20 23:14:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:14:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:14:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:16,585 INFO L225 Difference]: With dead ends: 43 [2021-11-20 23:14:16,585 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 23:14:16,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:14:16,588 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:16,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 76 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 19.3s Time] [2021-11-20 23:14:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 23:14:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-20 23:14:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:14:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2021-11-20 23:14:16,625 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 8 [2021-11-20 23:14:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:16,625 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2021-11-20 23:14:16,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:14:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2021-11-20 23:14:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:14:16,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:16,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:16,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:16,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:16,838 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2021-11-20 23:14:16,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:16,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349115250] [2021-11-20 23:14:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:16,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:16,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:16,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:14:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:14:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:17,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:27,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349115250] [2021-11-20 23:14:27,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349115250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:27,730 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:27,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:14:27,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071439178] [2021-11-20 23:14:27,731 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:27,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:14:27,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:14:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:14:27,733 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-20 23:14:38,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:40,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:42,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:45,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:48,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:51,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:53,203 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:55,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:57,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:00,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:00,179 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-20 23:15:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:15:00,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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 8 [2021-11-20 23:15:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:00,290 INFO L225 Difference]: With dead ends: 44 [2021-11-20 23:15:00,290 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 23:15:00,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=37, Invalid=94, Unknown=1, NotChecked=0, Total=132 [2021-11-20 23:15:00,292 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:00,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 10 Unknown, 0 Unchecked, 28.2s Time] [2021-11-20 23:15:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 23:15:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-20 23:15:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:15:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-20 23:15:00,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 8 [2021-11-20 23:15:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:00,306 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-20 23:15:00,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 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) [2021-11-20 23:15:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-20 23:15:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:15:00,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:00,308 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:00,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-20 23:15:00,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:00,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:00,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2021-11-20 23:15:00,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:00,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730961759] [2021-11-20 23:15:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:00,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:00,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:00,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:00,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:15:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:15:01,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:09,784 WARN L838 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from false [2021-11-20 23:15:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:34,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730961759] [2021-11-20 23:15:34,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730961759] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:15:34,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:15:34,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-11-20 23:15:34,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883116996] [2021-11-20 23:15:34,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:34,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:34,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=57, Unknown=1, NotChecked=14, Total=90 [2021-11-20 23:15:34,542 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:15:37,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:40,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:42,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:42,890 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-20 23:15:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:15:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-20 23:15:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:43,003 INFO L225 Difference]: With dead ends: 42 [2021-11-20 23:15:43,003 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 23:15:43,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=22, Invalid=71, Unknown=1, NotChecked=16, Total=110 [2021-11-20 23:15:43,005 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:43,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 3 Unknown, 18 Unchecked, 7.5s Time] [2021-11-20 23:15:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 23:15:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-20 23:15:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:15:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-20 23:15:43,018 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 13 [2021-11-20 23:15:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:43,018 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-20 23:15:43,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:15:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-20 23:15:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 23:15:43,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:43,020 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:43,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:43,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:43,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2021-11-20 23:15:43,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:43,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983053895] [2021-11-20 23:15:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:43,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:43,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:43,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:15:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:15:44,475 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:15:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:15:45,785 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-20 23:15:45,785 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:15:45,786 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:15:45,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:45,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:45,991 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-11-20 23:15:45,994 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:15:46,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:15:46 BoogieIcfgContainer [2021-11-20 23:15:46,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:15:46,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:15:46,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:15:46,018 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:15:46,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:56" (3/4) ... [2021-11-20 23:15:46,019 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 23:15:46,069 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:15:46,070 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:15:46,070 INFO L158 Benchmark]: Toolchain (without parser) took 113111.86ms. Allocated memory is still 73.4MB. Free memory was 50.9MB in the beginning and 28.7MB in the end (delta: 22.2MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2021-11-20 23:15:46,071 INFO L158 Benchmark]: CDTParser took 0.97ms. Allocated memory is still 54.5MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 41.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:15:46,071 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.83ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 54.6MB in the end (delta: -3.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:15:46,072 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.30ms. Allocated memory is still 73.4MB. Free memory was 54.6MB in the beginning and 52.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:15:46,072 INFO L158 Benchmark]: Boogie Preprocessor took 29.75ms. Allocated memory is still 73.4MB. Free memory was 52.9MB in the beginning and 51.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:15:46,073 INFO L158 Benchmark]: RCFGBuilder took 2778.90ms. Allocated memory is still 73.4MB. Free memory was 51.6MB in the beginning and 41.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:15:46,073 INFO L158 Benchmark]: TraceAbstraction took 109926.54ms. Allocated memory is still 73.4MB. Free memory was 40.9MB in the beginning and 30.8MB in the end (delta: 10.1MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2021-11-20 23:15:46,073 INFO L158 Benchmark]: Witness Printer took 52.10ms. Allocated memory is still 73.4MB. Free memory was 30.8MB in the beginning and 28.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:15:46,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.97ms. Allocated memory is still 54.5MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 41.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.83ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 54.6MB in the end (delta: -3.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.30ms. Allocated memory is still 73.4MB. Free memory was 54.6MB in the beginning and 52.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.75ms. Allocated memory is still 73.4MB. Free memory was 52.9MB in the beginning and 51.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2778.90ms. Allocated memory is still 73.4MB. Free memory was 51.6MB in the beginning and 41.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 109926.54ms. Allocated memory is still 73.4MB. Free memory was 40.9MB in the beginning and 30.8MB in the end (delta: 10.1MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * Witness Printer took 52.10ms. Allocated memory is still 73.4MB. Free memory was 30.8MB in the beginning and 28.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=0.10416666666666682, counter=0, r=1, s=3.25, x=0.10416666666666682] [L33] EXPR counter++ VAL [a=0.10416666666666682, counter=1, counter++=0, r=1, s=3.25, x=0.10416666666666682] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [a=0.10416666666666682, counter=1, r=1, s=3.25, x=0.10416666666666682] [L35] CALL __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [a=0.10416666666666682, counter=1, r=1, s=3.25, x=0.10416666666666682] [L36] CALL __VERIFIER_assert((int)(8*r*s - 24*a + 16*r - 12*s + 24*x - 3 == 0)) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 109.8s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 60.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 20 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 54.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 300 SdHoareTripleChecker+Invalid, 53.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18 IncrementalHoareTripleChecker+Unchecked, 208 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51 IncrementalHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 92 mSDtfsCounter, 51 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 27.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=3, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 44.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 64 ConstructedInterpolants, 1 QuantifiedInterpolants, 383 SizeOfPredicates, 5 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 7 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 23:15:46,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a88df518-f78c-4eb8-99af-0c1e9cbc600d/bin/utaipan-TEXQjIfE4P/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE