./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i --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_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/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 54165abed718b8d39f88748583b76365fb540324 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 17:12:46,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:12:46,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:12:46,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:12:46,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:12:46,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:12:46,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:12:46,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:12:46,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:12:46,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:12:46,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:12:46,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:12:46,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:12:46,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:12:46,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:12:46,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:12:46,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:12:46,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:12:46,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:12:46,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:12:46,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:12:46,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:12:46,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:12:46,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:12:46,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:12:46,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:12:46,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:12:46,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:12:46,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:12:46,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:12:46,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:12:46,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:12:46,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:12:46,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:12:46,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:12:46,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:12:46,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:12:46,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:12:46,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:12:46,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:12:46,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:12:46,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:12:46,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:12:46,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:12:46,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:12:46,512 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:12:46,512 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:12:46,512 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:12:46,512 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:12:46,512 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:12:46,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:12:46,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:12:46,513 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:12:46,513 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:12:46,513 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:12:46,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:12:46,513 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:12:46,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:12:46,514 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:12:46,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:12:46,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:12:46,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:12:46,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:12:46,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:12:46,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:12:46,515 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:12:46,515 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:12:46,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:12:46,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:12:46,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:12:46,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:12:46,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:12:46,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:12:46,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:12:46,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:12:46,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:12:46,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:12:46,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:12:46,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:12:46,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:12:46,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:12:46,517 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_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54165abed718b8d39f88748583b76365fb540324 [2020-12-09 17:12:46,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:12:46,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:12:46,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:12:46,732 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:12:46,733 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:12:46,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2020-12-09 17:12:46,774 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/data/71bf00a12/678dc0e5a1104c28b20bee44252dbf34/FLAG5cdc97afa [2020-12-09 17:12:47,184 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:12:47,184 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2020-12-09 17:12:47,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/data/71bf00a12/678dc0e5a1104c28b20bee44252dbf34/FLAG5cdc97afa [2020-12-09 17:12:47,203 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/data/71bf00a12/678dc0e5a1104c28b20bee44252dbf34 [2020-12-09 17:12:47,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:12:47,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:12:47,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:12:47,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:12:47,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:12:47,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9f9cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47, skipping insertion in model container [2020-12-09 17:12:47,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:12:47,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:12:47,426 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_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2020-12-09 17:12:47,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:12:47,452 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:12:47,473 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_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2020-12-09 17:12:47,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:12:47,520 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:12:47,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47 WrapperNode [2020-12-09 17:12:47,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:12:47,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:12:47,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:12:47,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:12:47,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:12:47,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:12:47,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:12:47,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:12:47,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... [2020-12-09 17:12:47,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:12:47,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:12:47,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:12:47,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:12:47,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/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 17:12:47,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 17:12:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:12:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 17:12:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 17:12:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:12:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 17:12:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:12:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:12:47,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:12:47,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:12:48,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:12:48,431 INFO L299 CfgBuilder]: Removed 75 assume(true) statements. [2020-12-09 17:12:48,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:12:48 BoogieIcfgContainer [2020-12-09 17:12:48,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:12:48,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:12:48,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:12:48,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:12:48,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:12:47" (1/3) ... [2020-12-09 17:12:48,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c061556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:12:48, skipping insertion in model container [2020-12-09 17:12:48,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:12:47" (2/3) ... [2020-12-09 17:12:48,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c061556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:12:48, skipping insertion in model container [2020-12-09 17:12:48,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:12:48" (3/3) ... [2020-12-09 17:12:48,441 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-12-09 17:12:48,454 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:12:48,457 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-12-09 17:12:48,468 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-12-09 17:12:48,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:12:48,490 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:12:48,490 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:12:48,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:12:48,490 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:12:48,490 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:12:48,490 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:12:48,490 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:12:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-12-09 17:12:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:12:48,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:48,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:12:48,506 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:48,510 INFO L82 PathProgramCache]: Analyzing trace with hash 412758470, now seen corresponding path program 1 times [2020-12-09 17:12:48,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:48,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260271981] [2020-12-09 17:12:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:12:48,606 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 17:12:48,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260271981] [2020-12-09 17:12:48,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:12:48,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:12:48,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175014749] [2020-12-09 17:12:48,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 17:12:48,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:12:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 17:12:48,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:12:48,627 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2020-12-09 17:12:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:12:48,650 INFO L93 Difference]: Finished difference Result 165 states and 267 transitions. [2020-12-09 17:12:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:12:48,651 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 17:12:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:12:48,660 INFO L225 Difference]: With dead ends: 165 [2020-12-09 17:12:48,660 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 17:12:48,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:12:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 17:12:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-09 17:12:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 17:12:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-12-09 17:12:48,699 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 5 [2020-12-09 17:12:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:12:48,699 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-12-09 17:12:48,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 17:12:48,700 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-12-09 17:12:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:12:48,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:48,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:12:48,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:12:48,701 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash -109504029, now seen corresponding path program 1 times [2020-12-09 17:12:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:48,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621912994] [2020-12-09 17:12:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:12:48,747 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 17:12:48,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621912994] [2020-12-09 17:12:48,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:12:48,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:12:48,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983636734] [2020-12-09 17:12:48,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:12:48,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:12:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:12:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:12:48,750 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 3 states. [2020-12-09 17:12:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:12:48,774 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2020-12-09 17:12:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:12:48,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 17:12:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:12:48,775 INFO L225 Difference]: With dead ends: 157 [2020-12-09 17:12:48,775 INFO L226 Difference]: Without dead ends: 81 [2020-12-09 17:12:48,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:12:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-09 17:12:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-09 17:12:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-09 17:12:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-12-09 17:12:48,787 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 6 [2020-12-09 17:12:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:12:48,788 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-12-09 17:12:48,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:12:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-12-09 17:12:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:12:48,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:48,788 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:12:48,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:12:48,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1225687709, now seen corresponding path program 1 times [2020-12-09 17:12:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:48,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060692771] [2020-12-09 17:12:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:12:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:12:48,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060692771] [2020-12-09 17:12:48,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:12:48,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:12:48,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429256325] [2020-12-09 17:12:48,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:12:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:12:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:12:48,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:12:48,849 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 4 states. [2020-12-09 17:12:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:12:48,934 INFO L93 Difference]: Finished difference Result 212 states and 231 transitions. [2020-12-09 17:12:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:12:48,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 17:12:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:12:48,937 INFO L225 Difference]: With dead ends: 212 [2020-12-09 17:12:48,937 INFO L226 Difference]: Without dead ends: 206 [2020-12-09 17:12:48,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 17:12:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-09 17:12:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 83. [2020-12-09 17:12:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 17:12:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-09 17:12:48,947 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 8 [2020-12-09 17:12:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:12:48,947 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-09 17:12:48,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:12:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-09 17:12:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 17:12:48,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:48,948 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:12:48,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:12:48,949 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:48,949 INFO L82 PathProgramCache]: Analyzing trace with hash 139321444, now seen corresponding path program 1 times [2020-12-09 17:12:48,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:48,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021161722] [2020-12-09 17:12:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:12:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:12:49,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021161722] [2020-12-09 17:12:49,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:12:49,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:12:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122885220] [2020-12-09 17:12:49,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:12:49,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:12:49,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:12:49,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:12:49,026 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-09 17:12:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:12:49,141 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-12-09 17:12:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:12:49,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 17:12:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:12:49,142 INFO L225 Difference]: With dead ends: 110 [2020-12-09 17:12:49,142 INFO L226 Difference]: Without dead ends: 108 [2020-12-09 17:12:49,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:12:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-09 17:12:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-12-09 17:12:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-09 17:12:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-12-09 17:12:49,150 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 15 [2020-12-09 17:12:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:12:49,150 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-12-09 17:12:49,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:12:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-12-09 17:12:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 17:12:49,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:49,151 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:12:49,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:12:49,151 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash 117372431, now seen corresponding path program 1 times [2020-12-09 17:12:49,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:49,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279312987] [2020-12-09 17:12:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:12:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:12:49,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279312987] [2020-12-09 17:12:49,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:12:49,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:12:49,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113209827] [2020-12-09 17:12:49,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:12:49,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:12:49,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:12:49,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:12:49,214 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 5 states. [2020-12-09 17:12:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:12:49,306 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-12-09 17:12:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:12:49,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 17:12:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:12:49,307 INFO L225 Difference]: With dead ends: 81 [2020-12-09 17:12:49,307 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 17:12:49,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:12:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 17:12:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-09 17:12:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 17:12:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-12-09 17:12:49,312 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 15 [2020-12-09 17:12:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:12:49,312 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-12-09 17:12:49,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:12:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-12-09 17:12:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 17:12:49,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:49,313 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:12:49,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 17:12:49,313 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1592696504, now seen corresponding path program 1 times [2020-12-09 17:12:49,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:49,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809388703] [2020-12-09 17:12:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:12:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:12:49,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809388703] [2020-12-09 17:12:49,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:12:49,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:12:49,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257268404] [2020-12-09 17:12:49,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:12:49,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:12:49,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:12:49,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:12:49,361 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 5 states. [2020-12-09 17:12:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:12:49,532 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2020-12-09 17:12:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:12:49,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-09 17:12:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:12:49,534 INFO L225 Difference]: With dead ends: 189 [2020-12-09 17:12:49,534 INFO L226 Difference]: Without dead ends: 187 [2020-12-09 17:12:49,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:12:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-09 17:12:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 85. [2020-12-09 17:12:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-09 17:12:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-09 17:12:49,541 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 18 [2020-12-09 17:12:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:12:49,541 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-09 17:12:49,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:12:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-09 17:12:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 17:12:49,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:49,541 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:12:49,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 17:12:49,542 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:49,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:49,542 INFO L82 PathProgramCache]: Analyzing trace with hash 544596794, now seen corresponding path program 1 times [2020-12-09 17:12:49,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:49,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719199594] [2020-12-09 17:12:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:12:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:12:49,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719199594] [2020-12-09 17:12:49,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:12:49,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:12:49,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573537198] [2020-12-09 17:12:49,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:12:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:12:49,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:12:49,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:12:49,576 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 5 states. [2020-12-09 17:12:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:12:49,710 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2020-12-09 17:12:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:12:49,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-09 17:12:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:12:49,711 INFO L225 Difference]: With dead ends: 187 [2020-12-09 17:12:49,711 INFO L226 Difference]: Without dead ends: 185 [2020-12-09 17:12:49,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:12:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-09 17:12:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 91. [2020-12-09 17:12:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-09 17:12:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2020-12-09 17:12:49,717 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 18 [2020-12-09 17:12:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:12:49,717 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2020-12-09 17:12:49,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:12:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2020-12-09 17:12:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 17:12:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:12:49,718 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:12:49,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 17:12:49,718 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:12:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:12:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1523817848, now seen corresponding path program 1 times [2020-12-09 17:12:49,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:12:49,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774787272] [2020-12-09 17:12:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:12:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:12:49,734 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:12:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:12:49,746 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:12:49,766 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 17:12:49,766 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:12:49,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 17:12:49,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:12:49 BoogieIcfgContainer [2020-12-09 17:12:49,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:12:49,788 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:12:49,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:12:49,789 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:12:49,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:12:48" (3/4) ... [2020-12-09 17:12:49,790 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 17:12:49,821 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b24e45c2-0428-47d0-abf9-62d6ceb1d3e8/bin/utaipan/witness.graphml [2020-12-09 17:12:49,821 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:12:49,822 INFO L168 Benchmark]: Toolchain (without parser) took 2615.30 ms. Allocated memory was 81.8 MB in the beginning and 125.8 MB in the end (delta: 44.0 MB). Free memory was 41.3 MB in the beginning and 86.8 MB in the end (delta: -45.5 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:12:49,823 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 81.8 MB. Free memory is still 59.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:12:49,823 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.88 ms. Allocated memory is still 81.8 MB. Free memory was 41.2 MB in the beginning and 44.8 MB in the end (delta: -3.6 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-12-09 17:12:49,823 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.20 ms. Allocated memory is still 81.8 MB. Free memory was 44.8 MB in the beginning and 42.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:12:49,824 INFO L168 Benchmark]: Boogie Preprocessor took 31.98 ms. Allocated memory is still 81.8 MB. Free memory was 42.3 MB in the beginning and 39.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:12:49,824 INFO L168 Benchmark]: RCFGBuilder took 842.64 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 39.5 MB in the beginning and 67.1 MB in the end (delta: -27.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:12:49,825 INFO L168 Benchmark]: TraceAbstraction took 1353.02 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.4 MB in the beginning and 89.9 MB in the end (delta: -23.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:12:49,825 INFO L168 Benchmark]: Witness Printer took 32.65 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 86.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:12:49,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 81.8 MB. Free memory is still 59.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.88 ms. Allocated memory is still 81.8 MB. Free memory was 41.2 MB in the beginning and 44.8 MB in the end (delta: -3.6 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.20 ms. Allocated memory is still 81.8 MB. Free memory was 44.8 MB in the beginning and 42.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.98 ms. Allocated memory is still 81.8 MB. Free memory was 42.3 MB in the beginning and 39.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 842.64 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 39.5 MB in the beginning and 67.1 MB in the end (delta: -27.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1353.02 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.4 MB in the beginning and 89.9 MB in the end (delta: -23.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 32.65 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 86.8 MB in the end (delta: 3.1 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: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L638] struct list *data = ((void *)0); [L639] COND TRUE __VERIFIER_nondet_int() [L640] struct node *node = malloc(sizeof *node); [L641] COND FALSE !(!node) [L643] node->next = node [L644] node->value = __VERIFIER_nondet_int() [L645] struct list *item = malloc(sizeof *item); [L646] COND FALSE !(!item) [L648] item->slist = node [L649] item->next = data [L650] data = item [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) [L615] COND FALSE !(!(shape)) [L616] shape->next [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) [L623] EXPR shape->next [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 488 SDtfs, 715 SDslu, 764 SDs, 0 SdLazy, 420 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, 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, 7 MinimizatonAttempts, 346 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 6726 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 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...