./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan --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 39bbda04ca16eb75ea07b4929f3af02faa55a8e5 .................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan --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 39bbda04ca16eb75ea07b4929f3af02faa55a8e5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 19:28:08,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:28:08,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:28:08,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:28:08,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:28:08,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:28:08,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:28:08,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:28:08,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:28:08,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:28:08,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:28:08,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:28:08,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:28:08,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:28:08,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:28:08,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:28:08,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:28:08,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:28:08,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:28:08,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:28:08,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:28:08,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:28:08,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:28:08,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:28:08,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:28:08,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:28:08,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:28:08,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:28:08,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:28:08,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:28:08,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:28:08,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:28:08,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:28:08,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:28:08,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:28:08,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:28:08,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:28:08,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:28:08,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:28:08,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:28:08,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:28:08,493 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:28:08,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:28:08,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:28:08,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:28:08,515 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:28:08,515 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:28:08,515 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:28:08,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:28:08,516 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:28:08,516 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:28:08,516 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:28:08,516 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:28:08,516 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:28:08,517 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:28:08,517 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:28:08,517 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:28:08,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:28:08,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:28:08,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:28:08,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:28:08,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:28:08,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:28:08,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:28:08,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:28:08,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:28:08,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:28:08,520 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:28:08,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:28:08,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:28:08,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:28:08,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:28:08,521 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-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39bbda04ca16eb75ea07b4929f3af02faa55a8e5 [2020-12-09 19:28:08,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:28:08,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:28:08,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:28:08,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:28:08,719 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:28:08,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c [2020-12-09 19:28:08,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/a9da14a75/3ac054742c2f40e2bec89e27763d8269/FLAG678c6d5c4 [2020-12-09 19:28:09,130 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:28:09,130 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c [2020-12-09 19:28:09,135 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/a9da14a75/3ac054742c2f40e2bec89e27763d8269/FLAG678c6d5c4 [2020-12-09 19:28:09,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/a9da14a75/3ac054742c2f40e2bec89e27763d8269 [2020-12-09 19:28:09,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:28:09,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:28:09,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:28:09,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:28:09,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:28:09,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ca876c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09, skipping insertion in model container [2020-12-09 19:28:09,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:28:09,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:28:09,652 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c[458,471] [2020-12-09 19:28:09,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:28:09,668 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:28:09,677 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c[458,471] [2020-12-09 19:28:09,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:28:09,691 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:28:09,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09 WrapperNode [2020-12-09 19:28:09,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:28:09,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:28:09,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:28:09,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:28:09,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:28:09,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:28:09,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:28:09,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:28:09,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... [2020-12-09 19:28:09,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:28:09,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:28:09,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:28:09,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:28:09,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:28:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:28:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:28:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:28:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:28:09,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:28:09,981 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 19:28:09,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:09 BoogieIcfgContainer [2020-12-09 19:28:09,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:28:09,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:28:09,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:28:09,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:28:09,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:28:09" (1/3) ... [2020-12-09 19:28:09,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd2f236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:28:09, skipping insertion in model container [2020-12-09 19:28:09,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:09" (2/3) ... [2020-12-09 19:28:09,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd2f236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:28:09, skipping insertion in model container [2020-12-09 19:28:09,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:09" (3/3) ... [2020-12-09 19:28:09,991 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound2.c [2020-12-09 19:28:10,004 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:28:10,007 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 19:28:10,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 19:28:10,036 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:28:10,036 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:28:10,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:28:10,036 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:28:10,036 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:28:10,036 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:28:10,036 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:28:10,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:28:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 19:28:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 19:28:10,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:28:10,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 19:28:10,051 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:28:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:28:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 81490399, now seen corresponding path program 1 times [2020-12-09 19:28:10,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:28:10,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951402574] [2020-12-09 19:28:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:28:10,127 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:28:10,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23257804] [2020-12-09 19:28:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:28:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:28:10,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 19:28:10,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:28:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:28:10,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:28:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:28:10,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951402574] [2020-12-09 19:28:10,253 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:28:10,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23257804] [2020-12-09 19:28:10,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:28:10,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 19:28:10,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983454662] [2020-12-09 19:28:10,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:28:10,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:28:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:28:10,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:28:10,268 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-12-09 19:30:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:30:21,971 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-12-09 19:30:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:30:21,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 19:30:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:30:21,999 INFO L225 Difference]: With dead ends: 51 [2020-12-09 19:30:21,999 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 19:30:22,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=23, Invalid=31, Unknown=2, NotChecked=0, Total=56 [2020-12-09 19:30:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 19:30:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-12-09 19:30:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 19:30:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 19:30:22,027 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 5 [2020-12-09 19:30:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:30:22,028 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 19:30:22,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:30:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 19:30:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 19:30:22,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:30:22,028 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:30:22,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 19:30:22,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:30:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:30:22,233 INFO L82 PathProgramCache]: Analyzing trace with hash 908273882, now seen corresponding path program 1 times [2020-12-09 19:30:22,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:30:22,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704334020] [2020-12-09 19:30:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:30:22,249 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:30:22,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787675057] [2020-12-09 19:30:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:30:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:30:22,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:30:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:30:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:30:22,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:30:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:30:22,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704334020] [2020-12-09 19:30:22,326 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:30:22,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787675057] [2020-12-09 19:30:22,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165617793] [2020-12-09 19:30:22,341 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 19:30:22,341 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:30:22,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:30:22,348 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:30:22,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:30:22,750 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 19:30:24,842 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-09 19:30:25,176 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 19:30:25,282 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:30:25,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 19:30:25,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-09 19:30:25,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763332932] [2020-12-09 19:30:25,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:30:25,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:30:25,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:30:25,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-09 19:30:25,284 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-12-09 19:30:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:30:25,306 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-09 19:30:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:30:25,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 19:30:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:30:25,307 INFO L225 Difference]: With dead ends: 30 [2020-12-09 19:30:25,307 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 19:30:25,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:30:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 19:30:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 19:30:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 19:30:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 19:30:25,311 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-12-09 19:30:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:30:25,311 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 19:30:25,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:30:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 19:30:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 19:30:25,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:30:25,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 19:30:25,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:30:25,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:30:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:30:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1019667251, now seen corresponding path program 1 times [2020-12-09 19:30:25,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:30:25,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066412182] [2020-12-09 19:30:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:30:25,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:30:25,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902634651] [2020-12-09 19:30:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:30:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:30:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 19:30:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:30:27,675 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 19:30:27,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066412182] [2020-12-09 19:30:27,699 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:30:27,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902634651] [2020-12-09 19:30:27,699 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 19:30:27,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738505006] [2020-12-09 19:30:27,701 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 19:30:27,701 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:30:27,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:30:27,701 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:30:27,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:30:27,840 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 19:30:27,983 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-09 19:30:50,862 WARN L197 SmtUtils]: Spent 22.70 s on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-09 19:30:51,001 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-09 19:30:51,144 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-09 19:30:51,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:30:51,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:30:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 19:30:51,145 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 19:30:51,145 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:30:51,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-09 19:30:51,381 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 19:30:51,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:30:51 BoogieIcfgContainer [2020-12-09 19:30:51,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:30:51,382 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:30:51,383 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:30:51,383 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:30:51,384 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:09" (3/4) ... [2020-12-09 19:30:51,387 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 19:30:51,387 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:30:51,389 INFO L168 Benchmark]: Toolchain (without parser) took 161847.07 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 29.8 MB in the end (delta: 40.0 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. [2020-12-09 19:30:51,389 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 67.1 MB. Free memory is still 41.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:30:51,390 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.49 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 59.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:30:51,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.43 ms. Allocated memory is still 92.3 MB. Free memory was 59.9 MB in the beginning and 58.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:30:51,391 INFO L168 Benchmark]: Boogie Preprocessor took 14.66 ms. Allocated memory is still 92.3 MB. Free memory was 58.5 MB in the beginning and 57.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:30:51,392 INFO L168 Benchmark]: RCFGBuilder took 253.65 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 62.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:30:51,393 INFO L168 Benchmark]: TraceAbstraction took 161396.66 ms. Allocated memory is still 92.3 MB. Free memory was 61.7 MB in the beginning and 30.0 MB in the end (delta: 31.7 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2020-12-09 19:30:51,393 INFO L168 Benchmark]: Witness Printer took 5.02 ms. Allocated memory is still 92.3 MB. Free memory was 30.0 MB in the beginning and 29.8 MB in the end (delta: 258.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:30:51,397 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 67.1 MB. Free memory is still 41.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 149.49 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 59.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.43 ms. Allocated memory is still 92.3 MB. Free memory was 59.9 MB in the beginning and 58.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.66 ms. Allocated memory is still 92.3 MB. Free memory was 58.5 MB in the beginning and 57.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 253.65 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 62.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 161396.66 ms. Allocated memory is still 92.3 MB. Free memory was 61.7 MB in the beginning and 30.0 MB in the end (delta: 31.7 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.02 ms. Allocated memory is still 92.3 MB. Free memory was 30.0 MB in the beginning and 29.8 MB in the end (delta: 258.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] EXPR counter++ [L27] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x [L27] EXPR counter++ [L27] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) [L30] COND TRUE !(c < k) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 161.3s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 131.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 25 SDslu, 78 SDs, 0 SdLazy, 41 SolverSat, 12 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 126.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=1, 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 622 SizeOfPredicates, 4 NumberOfNonLiveVariables, 123 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 19:30:52,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:30:52,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:30:52,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:30:52,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:30:52,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:30:52,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:30:52,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:30:52,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:30:52,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:30:52,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:30:52,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:30:52,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:30:52,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:30:52,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:30:52,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:30:52,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:30:52,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:30:52,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:30:52,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:30:52,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:30:52,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:30:52,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:30:52,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:30:52,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:30:52,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:30:52,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:30:52,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:30:52,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:30:52,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:30:52,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:30:52,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:30:52,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:30:52,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:30:52,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:30:52,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:30:52,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:30:52,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:30:52,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:30:52,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:30:52,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:30:52,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 19:30:52,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:30:52,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:30:52,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:30:52,952 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:30:52,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:30:52,952 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:30:52,953 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:30:52,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:30:52,953 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:30:52,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:30:52,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:30:52,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:30:52,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:30:52,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:30:52,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:30:52,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 19:30:52,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:30:52,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:30:52,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:30:52,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:30:52,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:30:52,956 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 19:30:52,956 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 19:30:52,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:30:52,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:30:52,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:30:52,956 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39bbda04ca16eb75ea07b4929f3af02faa55a8e5 [2020-12-09 19:30:53,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:30:53,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:30:53,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:30:53,216 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:30:53,216 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:30:53,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c [2020-12-09 19:30:53,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/578aac1c5/f642871dff784d118463d5bef881e2aa/FLAGa44b1536a [2020-12-09 19:30:53,644 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:30:53,645 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c [2020-12-09 19:30:53,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/578aac1c5/f642871dff784d118463d5bef881e2aa/FLAGa44b1536a [2020-12-09 19:30:53,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/data/578aac1c5/f642871dff784d118463d5bef881e2aa [2020-12-09 19:30:53,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:30:53,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:30:53,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:30:53,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:30:53,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:30:53,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a260af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53, skipping insertion in model container [2020-12-09 19:30:53,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:30:53,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:30:53,800 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c[458,471] [2020-12-09 19:30:53,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:30:53,827 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:30:53,839 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c[458,471] [2020-12-09 19:30:53,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:30:53,867 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:30:53,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53 WrapperNode [2020-12-09 19:30:53,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:30:53,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:30:53,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:30:53,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:30:53,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:30:53,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:30:53,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:30:53,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:30:53,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... [2020-12-09 19:30:53,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:30:53,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:30:53,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:30:53,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:30:53,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:30:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 19:30:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:30:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:30:53,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:30:55,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:30:55,316 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 19:30:55,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:30:55 BoogieIcfgContainer [2020-12-09 19:30:55,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:30:55,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:30:55,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:30:55,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:30:55,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:30:53" (1/3) ... [2020-12-09 19:30:55,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208c0ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:30:55, skipping insertion in model container [2020-12-09 19:30:55,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:53" (2/3) ... [2020-12-09 19:30:55,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208c0ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:30:55, skipping insertion in model container [2020-12-09 19:30:55,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:30:55" (3/3) ... [2020-12-09 19:30:55,323 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound2.c [2020-12-09 19:30:55,332 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:30:55,335 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 19:30:55,346 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 19:30:55,362 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:30:55,362 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:30:55,362 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:30:55,362 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:30:55,363 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:30:55,363 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:30:55,363 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:30:55,363 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:30:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-09 19:30:55,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:30:55,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:30:55,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:30:55,375 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:30:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:30:55,379 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-09 19:30:55,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:30:55,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076486445] [2020-12-09 19:30:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 19:30:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:30:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:30:55,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:30:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:30:55,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:30:55,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076486445] [2020-12-09 19:30:55,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:30:55,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 19:30:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691268624] [2020-12-09 19:30:55,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:30:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:30:55,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:30:55,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:30:55,646 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-12-09 19:30:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:30:57,162 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-09 19:30:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:30:57,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 19:30:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:30:57,169 INFO L225 Difference]: With dead ends: 54 [2020-12-09 19:30:57,170 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 19:30:57,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:30:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 19:30:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-09 19:30:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 19:30:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 19:30:57,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2020-12-09 19:30:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:30:57,193 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 19:30:57,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:30:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 19:30:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 19:30:57,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:30:57,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 19:30:57,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 19:30:57,396 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:30:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:30:57,398 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-09 19:30:57,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:30:57,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2890585] [2020-12-09 19:30:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 19:30:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:30:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 19:30:57,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:30:58,039 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 19:30:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:30:58,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:00,331 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 19:31:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:31:02,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2890585] [2020-12-09 19:31:02,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1712460039] [2020-12-09 19:31:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt [2020-12-09 19:31:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 19:31:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:03,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:31:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692345369] [2020-12-09 19:31:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:31:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 19:31:05,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:06,727 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 11 [2020-12-09 19:31:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:06,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:13,717 WARN L197 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 19:31:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:13,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 19:31:13,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 6, 5] total 9 [2020-12-09 19:31:13,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912721120] [2020-12-09 19:31:13,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 19:31:13,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:31:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 19:31:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-09 19:31:13,731 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-12-09 19:31:14,681 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 19:31:15,137 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 19:31:18,018 WARN L197 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 19:31:21,853 WARN L197 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-09 19:31:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:24,261 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-09 19:31:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 19:31:24,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-09 19:31:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:24,263 INFO L225 Difference]: With dead ends: 30 [2020-12-09 19:31:24,263 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 19:31:24,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:31:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 19:31:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2020-12-09 19:31:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 19:31:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 19:31:24,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-09 19:31:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:24,267 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 19:31:24,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 19:31:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 19:31:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 19:31:24,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:24,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:24,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3,4 cvc4 --incremental --print-success --lang smt,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:31:24,872 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:31:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2020-12-09 19:31:24,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:31:24,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712094493] [2020-12-09 19:31:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 19:31:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:31:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:25,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:25,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712094493] [2020-12-09 19:31:25,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2053382937] [2020-12-09 19:31:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt [2020-12-09 19:31:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:25,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:31:25,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:25,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985952763] [2020-12-09 19:31:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:31:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:31:26,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:26,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 19:31:26,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2020-12-09 19:31:26,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886769087] [2020-12-09 19:31:26,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 19:31:26,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:31:26,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 19:31:26,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:31:26,515 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-09 19:31:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:27,248 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-09 19:31:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:31:27,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 19:31:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:27,249 INFO L225 Difference]: With dead ends: 20 [2020-12-09 19:31:27,249 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 19:31:27,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 19:31:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 19:31:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 19:31:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 19:31:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 19:31:27,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-12-09 19:31:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:27,254 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 19:31:27,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 19:31:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 19:31:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 19:31:27,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:27,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:27,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:31:27,858 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:31:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2020-12-09 19:31:27,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:31:27,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20298861] [2020-12-09 19:31:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 19:31:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 19:31:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:28,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 19:31:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:28,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:29,465 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-09 19:31:30,745 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-09 19:31:31,415 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 19:31:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:31,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20298861] [2020-12-09 19:31:31,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314042629] [2020-12-09 19:31:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt [2020-12-09 19:31:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:31,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 19:31:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:31,935 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 19:31:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:31,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214262283] [2020-12-09 19:31:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:31:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:34,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 19:31:34,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:35,590 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2020-12-09 19:31:36,361 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 19:31:37,817 WARN L197 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2020-12-09 19:31:37,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 19:31:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:37,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:31:39,317 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 19:31:39,324 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 19:31:39,324 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 19:31:45,456 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 19:31:51,319 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 19:31:56,845 WARN L197 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-09 19:31:56,856 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 19:31:56,857 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 19:32:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:32:01,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 19:32:01,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 9, 9] total 18 [2020-12-09 19:32:01,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204057082] [2020-12-09 19:32:01,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 19:32:01,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:32:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 19:32:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-12-09 19:32:01,246 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 18 states. [2020-12-09 19:32:04,207 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 19:32:05,178 WARN L197 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-12-09 19:32:16,399 WARN L197 SmtUtils]: Spent 3.83 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 19:32:20,654 WARN L197 SmtUtils]: Spent 2.57 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 19:32:28,176 WARN L197 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 19:32:33,559 WARN L197 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 19:32:46,145 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 19:32:49,716 WARN L197 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 19:32:58,854 WARN L197 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 19:33:03,996 WARN L197 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 19:33:10,773 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 19:33:18,878 WARN L197 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 19:33:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:33:19,533 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-12-09 19:33:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 19:33:19,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-12-09 19:33:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:33:19,565 INFO L225 Difference]: With dead ends: 42 [2020-12-09 19:33:19,566 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 19:33:19,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 81.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-12-09 19:33:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 19:33:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2020-12-09 19:33:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 19:33:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-09 19:33:19,575 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2020-12-09 19:33:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:33:19,575 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-09 19:33:19,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 19:33:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-09 19:33:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 19:33:19,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:33:19,576 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 19:33:20,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:33:20,179 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:33:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:33:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 2 times [2020-12-09 19:33:20,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:33:20,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702541446] [2020-12-09 19:33:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 19:33:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:33:20,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:33:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:33:21,242 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:33:21,304 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 19:33:21,304 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:33:21,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 19:33:21,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:33:21 BoogieIcfgContainer [2020-12-09 19:33:21,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:33:21,533 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:33:21,534 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:33:21,534 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:33:21,534 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:30:55" (3/4) ... [2020-12-09 19:33:21,535 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 19:33:21,570 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1ce58279-4cd6-4fc2-9471-325b8eb646a9/bin/utaipan/witness.graphml [2020-12-09 19:33:21,570 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:33:21,571 INFO L168 Benchmark]: Toolchain (without parser) took 147904.94 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 46.8 MB in the beginning and 64.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 39.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:33:21,571 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 65.0 MB. Free memory was 48.1 MB in the beginning and 48.0 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:33:21,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.66 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 49.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:33:21,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.10 ms. Allocated memory is still 65.0 MB. Free memory was 49.1 MB in the beginning and 47.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:33:21,572 INFO L168 Benchmark]: Boogie Preprocessor took 17.85 ms. Allocated memory is still 65.0 MB. Free memory was 47.7 MB in the beginning and 46.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:33:21,573 INFO L168 Benchmark]: RCFGBuilder took 1400.51 ms. Allocated memory is still 65.0 MB. Free memory was 46.4 MB in the beginning and 33.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:33:21,573 INFO L168 Benchmark]: TraceAbstraction took 146214.45 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 32.9 MB in the beginning and 26.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2020-12-09 19:33:21,573 INFO L168 Benchmark]: Witness Printer took 36.79 ms. Allocated memory is still 81.8 MB. Free memory was 26.6 MB in the beginning and 64.4 MB in the end (delta: -37.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:33:21,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 65.0 MB. Free memory was 48.1 MB in the beginning and 48.0 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 200.66 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 49.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.10 ms. Allocated memory is still 65.0 MB. Free memory was 49.1 MB in the beginning and 47.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.85 ms. Allocated memory is still 65.0 MB. Free memory was 47.7 MB in the beginning and 46.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1400.51 ms. Allocated memory is still 65.0 MB. Free memory was 46.4 MB in the beginning and 33.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 146214.45 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 32.9 MB in the beginning and 26.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. * Witness Printer took 36.79 ms. Allocated memory is still 81.8 MB. Free memory was 26.6 MB in the beginning and 64.4 MB in the end (delta: -37.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND FALSE !(counter++<2) [L10] COND TRUE !(cond) VAL [counter=3] [L12] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 146.1s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 91.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 129 SDslu, 140 SDs, 0 SdLazy, 147 SolverSat, 78 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 31.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 153 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 103.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, 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, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 45.8s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 191 ConstructedInterpolants, 12 QuantifiedInterpolants, 29261 SizeOfPredicates, 38 NumberOfNonLiveVariables, 432 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 6/54 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! Received shutdown request...