./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/for_bounded_loop1.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_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/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_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/for_bounded_loop1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/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_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/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 d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:20:04,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:20:04,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:20:04,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:20:04,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:20:04,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:20:04,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:20:04,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:20:04,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:20:04,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:20:04,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:20:04,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:20:04,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:20:04,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:20:04,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:20:04,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:20:04,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:20:04,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:20:04,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:20:04,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:20:04,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:20:04,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:20:04,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:20:04,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:20:04,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:20:04,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:20:04,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:20:04,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:20:04,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:20:04,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:20:04,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:20:04,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:20:04,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:20:04,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:20:04,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:20:04,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:20:04,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:20:04,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:20:04,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:20:04,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:20:04,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:20:04,746 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:20:04,802 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:20:04,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:20:04,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:20:04,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:20:04,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:20:04,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:20:04,813 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:20:04,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:20:04,814 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:20:04,814 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:20:04,816 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:20:04,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:20:04,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:20:04,817 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:20:04,817 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:20:04,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:20:04,818 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:20:04,818 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:20:04,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:20:04,819 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:20:04,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:20:04,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:20:04,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:20:04,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:20:04,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:20:04,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:20:04,824 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:20:04,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:20:04,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:20:04,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:20:04,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:20:04,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:20:04,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:04,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:20:04,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:20:04,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:20:04,827 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:20:04,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:20:04,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:20:04,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:20:04,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:20:04,829 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_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 [2021-11-21 01:20:05,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:20:05,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:20:05,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:20:05,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:20:05,144 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:20:05,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/loops/for_bounded_loop1.c [2021-11-21 01:20:05,235 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/data/2d6e587c0/9495b4e5c9dd41bb8255f8c0db212bd6/FLAGffe6683b3 [2021-11-21 01:20:05,742 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:20:05,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/sv-benchmarks/c/loops/for_bounded_loop1.c [2021-11-21 01:20:05,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/data/2d6e587c0/9495b4e5c9dd41bb8255f8c0db212bd6/FLAGffe6683b3 [2021-11-21 01:20:06,095 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/data/2d6e587c0/9495b4e5c9dd41bb8255f8c0db212bd6 [2021-11-21 01:20:06,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:20:06,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:20:06,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:06,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:20:06,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:20:06,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a9da65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06, skipping insertion in model container [2021-11-21 01:20:06,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:20:06,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:20:06,388 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_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2021-11-21 01:20:06,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:06,419 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:20:06,433 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_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2021-11-21 01:20:06,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:06,450 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:20:06,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06 WrapperNode [2021-11-21 01:20:06,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:06,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:06,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:20:06,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:20:06,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,481 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2021-11-21 01:20:06,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:06,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:20:06,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:20:06,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:20:06,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:20:06,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:20:06,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:20:06,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:20:06,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (1/1) ... [2021-11-21 01:20:06,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:06,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:06,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:20:06,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:20:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:20:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:20:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:20:06,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:20:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:20:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:20:06,666 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:20:06,668 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:20:06,790 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:20:06,823 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:20:06,823 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:20:06,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:06 BoogieIcfgContainer [2021-11-21 01:20:06,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:20:06,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:20:06,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:20:06,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:20:06,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:20:06" (1/3) ... [2021-11-21 01:20:06,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fa1d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:06, skipping insertion in model container [2021-11-21 01:20:06,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:06" (2/3) ... [2021-11-21 01:20:06,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fa1d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:06, skipping insertion in model container [2021-11-21 01:20:06,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:06" (3/3) ... [2021-11-21 01:20:06,842 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-11-21 01:20:06,848 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:20:06,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:20:06,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:20:06,944 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 [2021-11-21 01:20:06,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:20:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:20:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:20:06,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:06,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:06,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash -876755887, now seen corresponding path program 1 times [2021-11-21 01:20:07,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:07,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399239465] [2021-11-21 01:20:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:07,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:20:07,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399239465] [2021-11-21 01:20:07,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399239465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:07,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:07,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:20:07,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485425046] [2021-11-21 01:20:07,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:07,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:20:07,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:20:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:07,343 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) 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) [2021-11-21 01:20:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:07,394 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2021-11-21 01:20:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:20:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 [2021-11-21 01:20:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:07,406 INFO L225 Difference]: With dead ends: 40 [2021-11-21 01:20:07,407 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 01:20:07,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:07,415 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:07,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:20:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 01:20:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-11-21 01:20:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:20:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-21 01:20:07,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 7 [2021-11-21 01:20:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:07,464 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-21 01:20:07,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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) [2021-11-21 01:20:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-21 01:20:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:20:07,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:07,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:07,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:20:07,466 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash -911045328, now seen corresponding path program 1 times [2021-11-21 01:20:07,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:07,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925577533] [2021-11-21 01:20:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:07,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:20:07,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925577533] [2021-11-21 01:20:07,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925577533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:07,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:07,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:20:07,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122946113] [2021-11-21 01:20:07,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:07,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:20:07,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:07,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:20:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:20:07,586 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2021-11-21 01:20:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:07,672 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-11-21 01:20:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:20:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 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 [2021-11-21 01:20:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:07,676 INFO L225 Difference]: With dead ends: 25 [2021-11-21 01:20:07,676 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 01:20:07,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:20:07,686 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:07,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:20:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 01:20:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-11-21 01:20:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:20:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-21 01:20:07,700 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2021-11-21 01:20:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:07,700 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-21 01:20:07,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2021-11-21 01:20:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-21 01:20:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:20:07,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:07,702 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:07,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:20:07,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 562004919, now seen corresponding path program 1 times [2021-11-21 01:20:07,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680728634] [2021-11-21 01:20:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:07,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:20:07,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680728634] [2021-11-21 01:20:07,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680728634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:07,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:07,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:20:07,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164773608] [2021-11-21 01:20:07,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:07,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:20:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:20:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:20:08,001 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 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) [2021-11-21 01:20:08,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:08,150 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-11-21 01:20:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:20:08,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 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 14 [2021-11-21 01:20:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:08,154 INFO L225 Difference]: With dead ends: 33 [2021-11-21 01:20:08,154 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:20:08,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:20:08,156 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:08,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:20:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:20:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-21 01:20:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:20:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-21 01:20:08,165 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-11-21 01:20:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:08,166 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-21 01:20:08,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 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) [2021-11-21 01:20:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-21 01:20:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:20:08,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:08,170 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:08,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:20:08,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1311464614, now seen corresponding path program 1 times [2021-11-21 01:20:08,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:08,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171236852] [2021-11-21 01:20:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:08,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:20:08,226 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:20:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:20:08,305 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:20:08,305 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:20:08,306 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:20:08,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:20:08,316 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-21 01:20:08,319 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:20:08,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:20:08 BoogieIcfgContainer [2021-11-21 01:20:08,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:20:08,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:20:08,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:20:08,357 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:20:08,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:06" (3/4) ... [2021-11-21 01:20:08,360 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 01:20:08,403 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b3d46a-ca7c-45f4-bca4-09d6bdcfe9ab/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:20:08,403 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:20:08,404 INFO L158 Benchmark]: Toolchain (without parser) took 2301.38ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 80.9MB in the beginning and 112.9MB in the end (delta: -32.0MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2021-11-21 01:20:08,405 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 53.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:20:08,405 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.82ms. Allocated memory is still 113.2MB. Free memory was 80.6MB in the beginning and 88.5MB in the end (delta: -7.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 01:20:08,406 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.22ms. Allocated memory is still 113.2MB. Free memory was 88.5MB in the beginning and 87.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:20:08,406 INFO L158 Benchmark]: Boogie Preprocessor took 19.25ms. Allocated memory is still 113.2MB. Free memory was 86.8MB in the beginning and 86.1MB in the end (delta: 738.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:20:08,407 INFO L158 Benchmark]: RCFGBuilder took 323.56ms. Allocated memory is still 113.2MB. Free memory was 86.1MB in the beginning and 76.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:20:08,408 INFO L158 Benchmark]: TraceAbstraction took 1528.39ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 76.0MB in the beginning and 115.0MB in the end (delta: -39.0MB). Peak memory consumption was 109.8kB. Max. memory is 16.1GB. [2021-11-21 01:20:08,408 INFO L158 Benchmark]: Witness Printer took 47.10ms. Allocated memory is still 151.0MB. Free memory was 115.0MB in the beginning and 112.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:20:08,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 53.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.82ms. Allocated memory is still 113.2MB. Free memory was 80.6MB in the beginning and 88.5MB in the end (delta: -7.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.22ms. Allocated memory is still 113.2MB. Free memory was 88.5MB in the beginning and 87.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.25ms. Allocated memory is still 113.2MB. Free memory was 86.8MB in the beginning and 86.1MB in the end (delta: 738.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 323.56ms. Allocated memory is still 113.2MB. Free memory was 86.1MB in the beginning and 76.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1528.39ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 76.0MB in the beginning and 115.0MB in the end (delta: -39.0MB). Peak memory consumption was 109.8kB. Max. memory is 16.1GB. * Witness Printer took 47.10ms. Allocated memory is still 151.0MB. Free memory was 115.0MB in the beginning and 112.9MB 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: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i