./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c6e78e9875ea4d3aa8cd80df3425a04d4efa8e7 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-26 02:17:25,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:17:25,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:17:25,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:17:25,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:17:25,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:17:25,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:17:25,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:17:25,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:17:25,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:17:25,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:17:25,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:17:25,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:17:25,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:17:25,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:17:25,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:17:25,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:17:25,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:17:25,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:17:25,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:17:25,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:17:25,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:17:25,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:17:25,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:17:25,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:17:25,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:17:25,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:17:25,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:17:25,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:17:25,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:17:25,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:17:25,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:17:25,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:17:25,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:17:25,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:17:25,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:17:25,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:17:25,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:17:25,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:17:25,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:17:25,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:17:25,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:17:25,502 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:17:25,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:17:25,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:17:25,512 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:17:25,513 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:17:25,513 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:17:25,513 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:17:25,513 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:17:25,513 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:17:25,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:17:25,514 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:17:25,514 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:17:25,514 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:17:25,514 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:17:25,514 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:17:25,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:17:25,515 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:17:25,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:17:25,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:17:25,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:17:25,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:17:25,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:17:25,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:17:25,516 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:17:25,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:17:25,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:17:25,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:17:25,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:17:25,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:17:25,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:17:25,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:17:25,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:17:25,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:17:25,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:17:25,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:17:25,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:17:25,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:17:25,519 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/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(__VERIFIER_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 -> 2c6e78e9875ea4d3aa8cd80df3425a04d4efa8e7 [2019-11-26 02:17:25,650 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:17:25,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:17:25,663 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:17:25,665 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:17:25,665 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:17:25,666 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/../../sv-benchmarks/c/array-fpi/eqn2f.c [2019-11-26 02:17:25,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/data/fecc36a6f/b5b18f5f8ea94b71a75bc142ad235363/FLAG84410cc3b [2019-11-26 02:17:26,134 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:17:26,134 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/sv-benchmarks/c/array-fpi/eqn2f.c [2019-11-26 02:17:26,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/data/fecc36a6f/b5b18f5f8ea94b71a75bc142ad235363/FLAG84410cc3b [2019-11-26 02:17:26,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/data/fecc36a6f/b5b18f5f8ea94b71a75bc142ad235363 [2019-11-26 02:17:26,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:17:26,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:17:26,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:17:26,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:17:26,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:17:26,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ada3383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26, skipping insertion in model container [2019-11-26 02:17:26,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:17:26,191 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:17:26,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:17:26,411 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:17:26,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:17:26,444 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:17:26,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26 WrapperNode [2019-11-26 02:17:26,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:17:26,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:17:26,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:17:26,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:17:26,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:17:26,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:17:26,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:17:26,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:17:26,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... [2019-11-26 02:17:26,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:17:26,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:17:26,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:17:26,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:17:26,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/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 [2019-11-26 02:17:26,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:17:26,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:17:26,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:17:26,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:17:26,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:17:26,909 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:17:26,909 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-26 02:17:26,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:26 BoogieIcfgContainer [2019-11-26 02:17:26,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:17:26,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:17:26,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:17:26,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:17:26,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:17:26" (1/3) ... [2019-11-26 02:17:26,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b1d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:17:26, skipping insertion in model container [2019-11-26 02:17:26,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:26" (2/3) ... [2019-11-26 02:17:26,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b1d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:17:26, skipping insertion in model container [2019-11-26 02:17:26,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:26" (3/3) ... [2019-11-26 02:17:26,916 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2019-11-26 02:17:26,924 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:17:26,930 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:17:26,940 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:17:26,975 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:17:26,975 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:17:26,975 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:17:26,976 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:17:26,976 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:17:26,976 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:17:26,976 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:17:26,976 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:17:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-26 02:17:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:17:26,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:26,999 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:27,000 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:17:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2089039814, now seen corresponding path program 1 times [2019-11-26 02:17:27,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:27,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546483508] [2019-11-26 02:17:27,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:27,089 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:17:27,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19493318] [2019-11-26 02:17:27,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/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 [2019-11-26 02:17:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:27,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:17:27,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:17:27,238 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:17:27,239 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2019-11-26 02:17:27,240 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:17:27,279 INFO L567 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2019-11-26 02:17:27,280 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:17:27,280 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2019-11-26 02:17:27,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:17:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:27,327 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:17:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:27,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546483508] [2019-11-26 02:17:27,360 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:27,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19493318] [2019-11-26 02:17:27,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:27,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-26 02:17:27,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137131003] [2019-11-26 02:17:27,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:17:27,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:27,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:17:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:17:27,379 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 7 states. [2019-11-26 02:17:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:27,516 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-26 02:17:27,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:17:27,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-11-26 02:17:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:27,526 INFO L225 Difference]: With dead ends: 38 [2019-11-26 02:17:27,526 INFO L226 Difference]: Without dead ends: 21 [2019-11-26 02:17:27,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:17:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-26 02:17:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2019-11-26 02:17:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-26 02:17:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-11-26 02:17:27,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2019-11-26 02:17:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:27,558 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-26 02:17:27,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:17:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-11-26 02:17:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:17:27,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:27,559 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:27,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:27,768 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:17:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash 195197750, now seen corresponding path program 1 times [2019-11-26 02:17:27,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:27,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986505249] [2019-11-26 02:17:27,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:27,805 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:17:27,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710327141] [2019-11-26 02:17:27,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/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 [2019-11-26 02:17:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:27,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:17:27,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:17:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:27,885 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:17:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:27,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986505249] [2019-11-26 02:17:27,913 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:27,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710327141] [2019-11-26 02:17:27,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321746252] [2019-11-26 02:17:27,940 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-26 02:17:27,946 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:17:27,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:17:27,965 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:17:27,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:17:28,607 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:17:28,748 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-11-26 02:17:29,224 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-11-26 02:17:29,225 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:29,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:17:29,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-26 02:17:29,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577828452] [2019-11-26 02:17:29,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:17:29,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:17:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:17:29,228 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 6 states. [2019-11-26 02:17:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:29,348 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-26 02:17:29,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:17:29,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-26 02:17:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:29,349 INFO L225 Difference]: With dead ends: 29 [2019-11-26 02:17:29,349 INFO L226 Difference]: Without dead ends: 24 [2019-11-26 02:17:29,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:17:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-26 02:17:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2019-11-26 02:17:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:17:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2019-11-26 02:17:29,354 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2019-11-26 02:17:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:29,355 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2019-11-26 02:17:29,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:17:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2019-11-26 02:17:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:17:29,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:29,356 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:29,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:29,560 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:17:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 332802379, now seen corresponding path program 1 times [2019-11-26 02:17:29,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:29,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961509786] [2019-11-26 02:17:29,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:29,573 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:17:29,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796240122] [2019-11-26 02:17:29,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/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 [2019-11-26 02:17:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:29,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:17:29,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:17:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:29,639 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:17:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:29,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961509786] [2019-11-26 02:17:29,649 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:29,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796240122] [2019-11-26 02:17:29,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:29,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-26 02:17:29,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794963478] [2019-11-26 02:17:29,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:17:29,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:17:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:17:29,650 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 5 states. [2019-11-26 02:17:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:29,680 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-11-26 02:17:29,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:17:29,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 02:17:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:29,681 INFO L225 Difference]: With dead ends: 25 [2019-11-26 02:17:29,682 INFO L226 Difference]: Without dead ends: 19 [2019-11-26 02:17:29,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:17:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-26 02:17:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2019-11-26 02:17:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:17:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-26 02:17:29,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2019-11-26 02:17:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:29,686 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-26 02:17:29,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:17:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-26 02:17:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:17:29,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:29,686 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:29,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:29,887 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:17:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:29,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1753240539, now seen corresponding path program 1 times [2019-11-26 02:17:29,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:29,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126327958] [2019-11-26 02:17:29,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:29,900 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:17:29,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627477471] [2019-11-26 02:17:29,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/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 [2019-11-26 02:17:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:29,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-26 02:17:29,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:17:30,528 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-11-26 02:17:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:30,552 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:17:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:30,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126327958] [2019-11-26 02:17:30,695 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:30,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627477471] [2019-11-26 02:17:30,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [244166805] [2019-11-26 02:17:30,696 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-26 02:17:30,697 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:17:30,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:17:30,697 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:17:30,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:17:31,111 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:17:31,237 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-11-26 02:17:31,669 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2019-11-26 02:17:31,670 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:31,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:17:31,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-26 02:17:31,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385894928] [2019-11-26 02:17:31,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 02:17:31,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:31,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 02:17:31,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:17:31,672 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 13 states. [2019-11-26 02:17:32,469 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2019-11-26 02:17:33,092 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2019-11-26 02:17:33,490 WARN L192 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2019-11-26 02:17:34,460 WARN L192 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2019-11-26 02:17:35,540 WARN L192 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2019-11-26 02:17:36,279 WARN L192 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-26 02:17:36,731 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-11-26 02:17:38,614 WARN L192 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2019-11-26 02:17:39,955 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-11-26 02:17:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:42,011 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-26 02:17:42,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-26 02:17:42,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 9 [2019-11-26 02:17:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:42,013 INFO L225 Difference]: With dead ends: 61 [2019-11-26 02:17:42,013 INFO L226 Difference]: Without dead ends: 59 [2019-11-26 02:17:42,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2019-11-26 02:17:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-26 02:17:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 21. [2019-11-26 02:17:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-26 02:17:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2019-11-26 02:17:42,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 9 [2019-11-26 02:17:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:42,023 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2019-11-26 02:17:42,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 02:17:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2019-11-26 02:17:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:17:42,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:42,024 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:42,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:42,235 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:17:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash 514116892, now seen corresponding path program 1 times [2019-11-26 02:17:42,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:42,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34560796] [2019-11-26 02:17:42,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:42,241 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:17:42,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260458774] [2019-11-26 02:17:42,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:42,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:17:42,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:17:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:42,322 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:17:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:42,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34560796] [2019-11-26 02:17:42,346 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:42,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260458774] [2019-11-26 02:17:42,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:42,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2019-11-26 02:17:42,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867733390] [2019-11-26 02:17:42,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:17:42,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:17:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:17:42,348 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand 8 states. [2019-11-26 02:17:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:42,419 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-11-26 02:17:42,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:17:42,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-11-26 02:17:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:42,420 INFO L225 Difference]: With dead ends: 35 [2019-11-26 02:17:42,420 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:17:42,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:17:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:17:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2019-11-26 02:17:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:17:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2019-11-26 02:17:42,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2019-11-26 02:17:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:42,425 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2019-11-26 02:17:42,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:17:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2019-11-26 02:17:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:17:42,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:42,425 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:42,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:42,626 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:17:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2049398374, now seen corresponding path program 2 times [2019-11-26 02:17:42,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:42,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607308481] [2019-11-26 02:17:42,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:42,635 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:17:42,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906712468] [2019-11-26 02:17:42,635 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:42,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-26 02:17:42,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:17:42,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-26 02:17:42,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:17:42,998 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-11-26 02:17:43,296 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2019-11-26 02:17:43,497 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2019-11-26 02:17:44,182 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2019-11-26 02:17:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:44,425 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:17:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:44,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607308481] [2019-11-26 02:17:44,738 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:44,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906712468] [2019-11-26 02:17:44,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541931058] [2019-11-26 02:17:44,739 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-26 02:17:44,739 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:17:44,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:17:44,739 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:17:44,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:17:45,055 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:17:45,542 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:17:45,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:17:45,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-26 02:17:45,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900576199] [2019-11-26 02:17:45,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-26 02:17:45,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-26 02:17:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:17:45,544 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 17 states. [2019-11-26 02:17:46,400 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 111 [2019-11-26 02:17:47,200 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2019-11-26 02:17:48,018 WARN L192 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2019-11-26 02:17:48,216 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-26 02:17:48,762 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 144 [2019-11-26 02:17:49,227 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 115 [2019-11-26 02:17:49,619 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 146 [2019-11-26 02:17:49,939 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2019-11-26 02:17:50,454 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2019-11-26 02:17:50,697 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 111 [2019-11-26 02:17:51,164 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2019-11-26 02:17:51,478 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 114 [2019-11-26 02:17:51,865 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2019-11-26 02:17:52,154 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2019-11-26 02:17:52,771 WARN L192 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 168 [2019-11-26 02:17:53,472 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 134 [2019-11-26 02:17:54,067 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 165 [2019-11-26 02:17:54,366 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2019-11-26 02:17:54,860 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 142 [2019-11-26 02:17:55,358 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 108 [2019-11-26 02:17:56,226 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 139 [2019-11-26 02:17:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:56,227 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2019-11-26 02:17:56,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-26 02:17:56,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 11 [2019-11-26 02:17:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:56,229 INFO L225 Difference]: With dead ends: 99 [2019-11-26 02:17:56,229 INFO L226 Difference]: Without dead ends: 97 [2019-11-26 02:17:56,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=661, Invalid=2999, Unknown=0, NotChecked=0, Total=3660 [2019-11-26 02:17:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-26 02:17:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 23. [2019-11-26 02:17:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:17:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2019-11-26 02:17:56,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 11 [2019-11-26 02:17:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:56,239 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2019-11-26 02:17:56,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-26 02:17:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2019-11-26 02:17:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:17:56,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:56,240 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:56,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:56,441 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:17:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash -303252249, now seen corresponding path program 1 times [2019-11-26 02:17:56,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:56,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211275782] [2019-11-26 02:17:56,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:56,460 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:17:56,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742480010] [2019-11-26 02:17:56,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/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 [2019-11-26 02:17:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:17:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:17:56,533 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:17:56,533 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:17:56,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:56,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:17:56 BoogieIcfgContainer [2019-11-26 02:17:56,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:17:56,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:17:56,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:17:56,770 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:17:56,770 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:26" (3/4) ... [2019-11-26 02:17:56,772 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:17:56,818 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e29f12e4-05b8-48f4-ace3-fd6cf7ac11b7/bin/utaipan/witness.graphml [2019-11-26 02:17:56,819 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:17:56,820 INFO L168 Benchmark]: Toolchain (without parser) took 30660.37 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 237.5 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -273.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:56,820 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:56,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -186.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:56,821 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:56,821 INFO L168 Benchmark]: Boogie Preprocessor took 22.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:56,822 INFO L168 Benchmark]: RCFGBuilder took 413.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:56,822 INFO L168 Benchmark]: TraceAbstraction took 29858.24 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 100.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -118.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:56,822 INFO L168 Benchmark]: Witness Printer took 49.49 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:56,824 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 284.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -186.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 413.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 29858.24 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 100.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -118.5 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 49.49 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] a[0] = 8 [L27] b[0] = 1 [L29] i=1 VAL [N=2] [L29] COND TRUE i