./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test_while_int.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test_while_int.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V --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 f3aef2cb0383bc51116609eb7d5762e5307f0f48dd90c41df34c9f2444e8da09 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:52:54,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:52:54,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:52:54,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:52:54,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:52:54,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:52:54,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:52:54,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:52:54,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:52:54,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:52:54,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:52:54,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:52:54,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:52:54,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:52:54,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:52:54,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:52:54,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:52:54,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:52:54,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:52:54,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:52:54,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:52:54,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:52:54,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:52:54,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:52:54,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:52:54,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:52:54,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:52:54,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:52:54,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:52:54,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:52:54,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:52:54,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:52:54,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:52:54,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:52:54,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:52:54,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:52:54,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:52:54,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:52:54,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:52:54,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:52:54,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:52:54,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:52:54,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:52:54,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:52:54,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:52:54,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:52:54,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:52:54,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:52:54,791 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:52:54,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:52:54,792 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:52:54,792 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:52:54,793 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:52:54,794 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:52:54,794 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:52:54,794 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:52:54,795 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:52:54,795 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:52:54,795 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:52:54,796 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:52:54,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:52:54,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:52:54,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:52:54,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:52:54,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:52:54,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:52:54,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:52:54,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:52:54,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:52:54,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:52:54,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:52:54,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:52:54,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:52:54,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:52:54,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:52:54,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:52:54,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:52:54,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:52:54,804 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:52:54,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:52:54,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:52:54,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:52:54,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:52:54,805 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_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3aef2cb0383bc51116609eb7d5762e5307f0f48dd90c41df34c9f2444e8da09 [2021-11-23 02:52:55,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:52:55,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:52:55,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:52:55,122 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:52:55,123 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:52:55,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-regression/test_while_int.i [2021-11-23 02:52:55,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/data/ec4437d2d/6e3207eec2ac460095f4da5701e2e41e/FLAGf25bd3be1 [2021-11-23 02:52:55,687 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:52:55,687 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/sv-benchmarks/c/ldv-regression/test_while_int.i [2021-11-23 02:52:55,699 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/data/ec4437d2d/6e3207eec2ac460095f4da5701e2e41e/FLAGf25bd3be1 [2021-11-23 02:52:56,063 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/data/ec4437d2d/6e3207eec2ac460095f4da5701e2e41e [2021-11-23 02:52:56,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:52:56,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:52:56,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:52:56,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:52:56,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:52:56,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480d0f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56, skipping insertion in model container [2021-11-23 02:52:56,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:52:56,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:52:56,281 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_4732e8a3-c876-4938-b454-1aff6726ad15/sv-benchmarks/c/ldv-regression/test_while_int.i[296,309] [2021-11-23 02:52:56,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:52:56,308 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:52:56,322 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_4732e8a3-c876-4938-b454-1aff6726ad15/sv-benchmarks/c/ldv-regression/test_while_int.i[296,309] [2021-11-23 02:52:56,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:52:56,341 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:52:56,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56 WrapperNode [2021-11-23 02:52:56,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:52:56,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:52:56,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:52:56,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:52:56,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,379 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 27 [2021-11-23 02:52:56,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:52:56,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:52:56,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:52:56,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:52:56,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:52:56,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:52:56,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:52:56,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:52:56,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (1/1) ... [2021-11-23 02:52:56,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:52:56,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:56,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:52:56,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:52:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:52:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:52:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:52:56,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:52:56,565 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:52:56,568 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:52:56,664 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:52:56,686 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:52:56,686 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:52:56,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:56 BoogieIcfgContainer [2021-11-23 02:52:56,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:52:56,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:52:56,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:52:56,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:52:56,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:52:56" (1/3) ... [2021-11-23 02:52:56,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8673b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:56, skipping insertion in model container [2021-11-23 02:52:56,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:56" (2/3) ... [2021-11-23 02:52:56,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8673b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:56, skipping insertion in model container [2021-11-23 02:52:56,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:56" (3/3) ... [2021-11-23 02:52:56,700 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2021-11-23 02:52:56,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:52:56,707 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:52:56,763 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:52:56,772 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 [2021-11-23 02:52:56,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:52:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 02:52:56,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:56,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 02:52:56,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1917709, now seen corresponding path program 1 times [2021-11-23 02:52:56,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:56,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059338443] [2021-11-23 02:52:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:56,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:52:57,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:57,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059338443] [2021-11-23 02:52:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059338443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:57,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:57,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:52:57,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039502144] [2021-11-23 02:52:57,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:57,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:52:57,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:57,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:52:57,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:52:57,051 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:57,121 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-23 02:52:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:52:57,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 02:52:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:57,133 INFO L225 Difference]: With dead ends: 15 [2021-11-23 02:52:57,149 INFO L226 Difference]: Without dead ends: 8 [2021-11-23 02:52:57,153 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 [2021-11-23 02:52:57,158 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:57,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:52:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-23 02:52:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-23 02:52:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-23 02:52:57,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2021-11-23 02:52:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:57,222 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-23 02:52:57,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-23 02:52:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:52:57,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:57,223 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-23 02:52:57,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:52:57,224 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1294206969, now seen corresponding path program 1 times [2021-11-23 02:52:57,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:57,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781241115] [2021-11-23 02:52:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:57,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:52:57,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:57,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781241115] [2021-11-23 02:52:57,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781241115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:52:57,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184946520] [2021-11-23 02:52:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:57,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:57,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:52:57,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:52:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:57,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:52:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:52:57,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:52:57,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184946520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:57,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978873635] [2021-11-23 02:52:57,820 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-23 02:52:57,821 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:52:57,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:52:57,833 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:52:57,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:52:58,389 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:52:58,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87#(and (<= |ULTIMATE.start_check_error_#in~b#1| 1) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_check_error_~b#1| 0) (<= 0 |ULTIMATE.start_check_error_#in~b#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:52:58,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:52:58,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:52:58,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 02:52:58,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52376951] [2021-11-23 02:52:58,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:52:58,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:52:58,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:52:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:52:58,652 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:58,772 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-11-23 02:52:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:52:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:52:58,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:58,782 INFO L225 Difference]: With dead ends: 23 [2021-11-23 02:52:58,782 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:52:58,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:52:58,787 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:58,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:52:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:52:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-11-23 02:52:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-23 02:52:58,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2021-11-23 02:52:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-23 02:52:58,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-23 02:52:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:52:58,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:58,806 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2021-11-23 02:52:58,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:59,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:59,026 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash -203289715, now seen corresponding path program 2 times [2021-11-23 02:52:59,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:59,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212714275] [2021-11-23 02:52:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:59,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:52:59,047 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:52:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:52:59,080 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:52:59,080 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:52:59,082 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:52:59,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:52:59,088 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-23 02:52:59,092 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:52:59,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:52:59 BoogieIcfgContainer [2021-11-23 02:52:59,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:52:59,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:52:59,118 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:52:59,118 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:52:59,118 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:56" (3/4) ... [2021-11-23 02:52:59,121 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 02:52:59,161 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:52:59,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:52:59,162 INFO L158 Benchmark]: Toolchain (without parser) took 3094.70ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 62.4MB in the beginning and 65.8MB in the end (delta: -3.3MB). Peak memory consumption was 18.4MB. Max. memory is 16.1GB. [2021-11-23 02:52:59,163 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:52:59,163 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.78ms. Allocated memory is still 94.4MB. Free memory was 62.2MB in the beginning and 71.6MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:52:59,164 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.84ms. Allocated memory is still 94.4MB. Free memory was 71.6MB in the beginning and 70.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:52:59,164 INFO L158 Benchmark]: Boogie Preprocessor took 23.11ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 69.5MB in the end (delta: 751.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:52:59,165 INFO L158 Benchmark]: RCFGBuilder took 285.08ms. Allocated memory is still 94.4MB. Free memory was 69.5MB in the beginning and 60.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:52:59,165 INFO L158 Benchmark]: TraceAbstraction took 2425.16ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 60.2MB in the beginning and 67.2MB in the end (delta: -7.0MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2021-11-23 02:52:59,166 INFO L158 Benchmark]: Witness Printer took 44.21ms. Allocated memory is still 115.3MB. Free memory was 67.2MB in the beginning and 65.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:52:59,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.78ms. Allocated memory is still 94.4MB. Free memory was 62.2MB in the beginning and 71.6MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.84ms. Allocated memory is still 94.4MB. Free memory was 71.6MB in the beginning and 70.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.11ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 69.5MB in the end (delta: 751.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 285.08ms. Allocated memory is still 94.4MB. Free memory was 69.5MB in the beginning and 60.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2425.16ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 60.2MB in the beginning and 67.2MB in the end (delta: -7.0MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * Witness Printer took 44.21ms. Allocated memory is still 115.3MB. Free memory was 67.2MB in the beginning and 65.8MB in the end (delta: 1.4MB). 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: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i=0; VAL [i=0] [L26] COND TRUE i<5 [L27] i++ [L31] CALL check_error(i!=3) [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) [L26] COND TRUE i<5 [L27] i++ [L31] CALL check_error(i!=3) [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) [L26] COND TRUE i<5 [L27] i++ [L31] CALL check_error(i!=3) [L20] (b) ? (0) : __blast_assert () [L20] CALL __blast_assert () [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38 IncrementalHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 8 mSDtfsCounter, 38 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 61 SizeOfPredicates, 2 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 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! [2021-11-23 02:52:59,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4732e8a3-c876-4938-b454-1aff6726ad15/bin/utaipan-EQgc7hIp5V/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