./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/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 1cc9cf79891afa42e51c5a84218adbd4a63e1151 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-28 07:26:12,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:26:12,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:26:12,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:26:12,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:26:12,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:26:12,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:26:12,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:26:12,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:26:12,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:26:12,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:26:12,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:26:12,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:26:12,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:26:12,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:26:12,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:26:12,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:26:12,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:26:12,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:26:12,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:26:12,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:26:12,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:26:12,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:26:12,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:26:12,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:26:12,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:26:12,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:26:12,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:26:12,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:26:12,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:26:12,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:26:12,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:26:12,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:26:12,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:26:12,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:26:12,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:26:12,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:26:12,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:26:12,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:26:12,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:26:12,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:26:12,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:26:12,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:26:12,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:26:12,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:26:12,488 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:26:12,488 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:26:12,489 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:26:12,489 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:26:12,489 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:26:12,489 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:26:12,489 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:26:12,490 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:26:12,490 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:26:12,490 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:26:12,490 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:26:12,491 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:26:12,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:26:12,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:26:12,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:26:12,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:26:12,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:26:12,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:26:12,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:26:12,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:26:12,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:26:12,493 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:26:12,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:26:12,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:26:12,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:26:12,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:26:12,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:26:12,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:26:12,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:26:12,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:26:12,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:26:12,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:26:12,496 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:26:12,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:26:12,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:26:12,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:26:12,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:26:12,497 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_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2020-11-28 07:26:12,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:26:12,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:26:12,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:26:12,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:26:12,805 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:26:12,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-11-28 07:26:12,888 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/data/e2cb28be3/48ee15abed7b429988cc496a72dfb7e6/FLAG5641437bd [2020-11-28 07:26:13,318 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:26:13,319 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-11-28 07:26:13,324 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/data/e2cb28be3/48ee15abed7b429988cc496a72dfb7e6/FLAG5641437bd [2020-11-28 07:26:13,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/data/e2cb28be3/48ee15abed7b429988cc496a72dfb7e6 [2020-11-28 07:26:13,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:26:13,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:26:13,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:26:13,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:26:13,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:26:13,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:26:13" (1/1) ... [2020-11-28 07:26:13,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1467f096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:13, skipping insertion in model container [2020-11-28 07:26:13,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:26:13" (1/1) ... [2020-11-28 07:26:13,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:26:13,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:26:13,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:26:13,981 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:26:14,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:26:14,029 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:26:14,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14 WrapperNode [2020-11-28 07:26:14,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:26:14,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:26:14,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:26:14,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:26:14,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:26:14,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:26:14,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:26:14,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:26:14,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... [2020-11-28 07:26:14,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:26:14,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:26:14,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:26:14,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:26:14,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/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 [2020-11-28 07:26:14,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:26:14,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:26:14,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:26:14,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:26:14,623 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:26:14,624 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-28 07:26:14,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:26:14 BoogieIcfgContainer [2020-11-28 07:26:14,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:26:14,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:26:14,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:26:14,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:26:14,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:26:13" (1/3) ... [2020-11-28 07:26:14,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e5582e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:26:14, skipping insertion in model container [2020-11-28 07:26:14,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:14" (2/3) ... [2020-11-28 07:26:14,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e5582e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:26:14, skipping insertion in model container [2020-11-28 07:26:14,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:26:14" (3/3) ... [2020-11-28 07:26:14,636 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2020-11-28 07:26:14,652 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:26:14,655 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:26:14,667 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:26:14,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:26:14,692 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:26:14,692 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:26:14,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:26:14,692 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:26:14,699 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:26:14,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:26:14,699 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:26:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-28 07:26:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:26:14,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:14,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:26:14,718 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash 100358031, now seen corresponding path program 1 times [2020-11-28 07:26:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:14,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626656699] [2020-11-28 07:26:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626656699] [2020-11-28 07:26:14,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:26:14,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:26:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338724926] [2020-11-28 07:26:14,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:26:14,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:14,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:26:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:26:14,892 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-28 07:26:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:14,907 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-28 07:26:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:26:14,909 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-28 07:26:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:14,919 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:26:14,919 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:26:14,925 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 [2020-11-28 07:26:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:26:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:26:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:26:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 07:26:14,960 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-11-28 07:26:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:14,961 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 07:26:14,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:26:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-28 07:26:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:26:14,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:14,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:26:14,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:26:14,964 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2020-11-28 07:26:14,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:14,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463534632] [2020-11-28 07:26:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:15,021 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:26:15,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672778970] [2020-11-28 07:26:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 07:26:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:26:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:15,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:26:15,216 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:26:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:15,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463534632] [2020-11-28 07:26:15,241 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:26:15,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672778970] [2020-11-28 07:26:15,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:26:15,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:26:15,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30801270] [2020-11-28 07:26:15,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:26:15,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:26:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:26:15,244 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-28 07:26:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:17,405 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-28 07:26:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:26:17,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:26:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:17,409 INFO L225 Difference]: With dead ends: 33 [2020-11-28 07:26:17,410 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:26:17,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:26:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:26:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-11-28 07:26:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:26:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-28 07:26:17,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 5 [2020-11-28 07:26:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:17,418 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-28 07:26:17,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:26:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-28 07:26:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:26:17,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:17,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:26:17,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:26:17,653 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1211487480, now seen corresponding path program 1 times [2020-11-28 07:26:17,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:17,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603161443] [2020-11-28 07:26:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:17,667 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:26:17,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713421695] [2020-11-28 07:26:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:26:17,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:26:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:17,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:26:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:17,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603161443] [2020-11-28 07:26:17,766 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:26:17,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713421695] [2020-11-28 07:26:17,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:26:17,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:26:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179430559] [2020-11-28 07:26:17,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:26:17,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:17,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:26:17,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:26:17,769 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2020-11-28 07:26:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:17,817 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-28 07:26:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:26:17,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-28 07:26:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:17,820 INFO L225 Difference]: With dead ends: 26 [2020-11-28 07:26:17,820 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:26:17,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:26:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:26:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-11-28 07:26:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:26:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-28 07:26:17,828 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2020-11-28 07:26:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:17,829 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-28 07:26:17,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:26:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-28 07:26:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:26:17,829 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:17,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:26:18,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:18,030 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:18,031 INFO L82 PathProgramCache]: Analyzing trace with hash -262222527, now seen corresponding path program 1 times [2020-11-28 07:26:18,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:18,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462593196] [2020-11-28 07:26:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:18,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:26:18,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183769330] [2020-11-28 07:26:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:18,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 07:26:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:26:18,150 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 07:26:18,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:26:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:18,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:26:18,274 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:26:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:18,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462593196] [2020-11-28 07:26:18,347 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:26:18,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183769330] [2020-11-28 07:26:18,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:26:18,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-11-28 07:26:18,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329459701] [2020-11-28 07:26:18,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:26:18,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:26:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:26:18,349 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-11-28 07:26:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:24,600 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-28 07:26:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:26:24,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-28 07:26:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:24,602 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:26:24,602 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:26:24,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:26:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:26:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:26:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:26:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-28 07:26:24,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2020-11-28 07:26:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:24,610 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-28 07:26:24,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:26:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-28 07:26:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:26:24,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:24,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-11-28 07:26:24,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:24,837 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 694035666, now seen corresponding path program 1 times [2020-11-28 07:26:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:24,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309526673] [2020-11-28 07:26:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:24,851 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:26:24,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596978793] [2020-11-28 07:26:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 07:26:24,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:26:25,175 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-11-28 07:26:25,197 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-28 07:26:25,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:26:25,374 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-11-28 07:26:25,394 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 2, 4, 1] term [2020-11-28 07:26:25,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:26:25,402 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-28 07:26:25,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:26:25,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:26:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:25,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:26:25,485 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:26:25,526 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 4, 1] term [2020-11-28 07:26:25,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:26:25,622 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:26:25,623 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:26:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:26:25,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309526673] [2020-11-28 07:26:25,629 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:26:25,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596978793] [2020-11-28 07:26:25,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508439140] [2020-11-28 07:26:25,651 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:26:25,652 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:26:25,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:26:25,660 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:26:25,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:26:25,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:26:26,378 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:26:26,672 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-11-28 07:26:26,903 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:26:27,092 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:26:27,695 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:26:28,169 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-28 07:26:28,171 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:26:28,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:26:28,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-11-28 07:26:28,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001320418] [2020-11-28 07:26:28,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:26:28,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:28,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:26:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:26:28,174 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-11-28 07:26:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:30,513 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-28 07:26:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:26:30,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-28 07:26:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:30,515 INFO L225 Difference]: With dead ends: 27 [2020-11-28 07:26:30,515 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:26:30,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:26:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:26:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2020-11-28 07:26:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:26:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-28 07:26:30,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-28 07:26:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:30,520 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-28 07:26:30,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:26:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-28 07:26:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:26:30,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:30,521 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-28 07:26:30,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:30,721 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash 40232488, now seen corresponding path program 1 times [2020-11-28 07:26:30,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:30,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068567819] [2020-11-28 07:26:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:30,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:26:30,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411774301] [2020-11-28 07:26:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/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 [2020-11-28 07:26:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:26:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:26:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:30,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:26:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:26:30,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068567819] [2020-11-28 07:26:30,871 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:26:30,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411774301] [2020-11-28 07:26:30,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666717352] [2020-11-28 07:26:30,874 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:26:30,874 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:26:30,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:26:30,875 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:26:30,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:26:30,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:26:31,281 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:26:31,665 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-28 07:26:31,833 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:26:31,972 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:26:32,338 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:26:32,760 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-28 07:26:32,942 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:26:33,174 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-28 07:26:33,175 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:26:33,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:26:33,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-28 07:26:33,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582056032] [2020-11-28 07:26:33,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:26:33,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:26:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:26:33,177 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-11-28 07:26:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:33,269 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-11-28 07:26:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:26:33,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-11-28 07:26:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:33,273 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:26:33,273 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:26:33,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-11-28 07:26:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:26:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 07:26:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 07:26:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-28 07:26:33,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2020-11-28 07:26:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:33,286 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-28 07:26:33,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:26:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-28 07:26:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 07:26:33,287 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:33,287 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1] [2020-11-28 07:26:33,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-28 07:26:33,488 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:33,488 INFO L82 PathProgramCache]: Analyzing trace with hash 624616152, now seen corresponding path program 2 times [2020-11-28 07:26:33,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:33,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477425299] [2020-11-28 07:26:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:33,502 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:26:33,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253654874] [2020-11-28 07:26:33,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/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 [2020-11-28 07:26:33,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-28 07:26:33,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-28 07:26:33,604 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:26:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:26:33,626 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:26:33,672 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:26:33,672 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:26:33,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:33,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:26:33 BoogieIcfgContainer [2020-11-28 07:26:33,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:26:33,941 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:26:33,941 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:26:33,942 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:26:33,944 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:26:14" (3/4) ... [2020-11-28 07:26:33,945 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:26:34,017 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7cf78b47-0d4b-4d8d-9049-fd5acf489e00/bin/utaipan/witness.graphml [2020-11-28 07:26:34,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:26:34,019 INFO L168 Benchmark]: Toolchain (without parser) took 20318.78 ms. Allocated memory was 83.9 MB in the beginning and 130.0 MB in the end (delta: 46.1 MB). Free memory was 55.7 MB in the beginning and 85.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:34,019 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory is still 40.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:26:34,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.96 ms. Allocated memory was 83.9 MB in the beginning and 107.0 MB in the end (delta: 23.1 MB). Free memory was 55.4 MB in the beginning and 84.5 MB in the end (delta: -29.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:34,020 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.99 ms. Allocated memory is still 107.0 MB. Free memory was 84.5 MB in the beginning and 83.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:34,021 INFO L168 Benchmark]: Boogie Preprocessor took 23.15 ms. Allocated memory is still 107.0 MB. Free memory was 83.2 MB in the beginning and 82.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:26:34,021 INFO L168 Benchmark]: RCFGBuilder took 520.95 ms. Allocated memory is still 107.0 MB. Free memory was 82.0 MB in the beginning and 61.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:34,022 INFO L168 Benchmark]: TraceAbstraction took 19313.69 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 61.4 MB in the beginning and 90.1 MB in the end (delta: -28.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:26:34,023 INFO L168 Benchmark]: Witness Printer took 76.14 ms. Allocated memory is still 130.0 MB. Free memory was 89.1 MB in the beginning and 85.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:34,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory is still 40.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.96 ms. Allocated memory was 83.9 MB in the beginning and 107.0 MB in the end (delta: 23.1 MB). Free memory was 55.4 MB in the beginning and 84.5 MB in the end (delta: -29.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.99 ms. Allocated memory is still 107.0 MB. Free memory was 84.5 MB in the beginning and 83.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.15 ms. Allocated memory is still 107.0 MB. Free memory was 83.2 MB in the beginning and 82.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 520.95 ms. Allocated memory is still 107.0 MB. Free memory was 82.0 MB in the beginning and 61.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19313.69 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 61.4 MB in the beginning and 90.1 MB in the end (delta: -28.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 76.14 ms. Allocated memory is still 130.0 MB. Free memory was 89.1 MB in the beginning and 85.9 MB in the end (delta: 3.2 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: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) [L13] COND FALSE !(!cond) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND FALSE !(counter++<5) [L16] COND TRUE !(cond) VAL [counter=6] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.1s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 77 SDslu, 111 SDs, 0 SdLazy, 110 SolverSat, 35 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 10.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, 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, 6 MinimizatonAttempts, 27 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 5753 SizeOfPredicates, 36 NumberOfNonLiveVariables, 360 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 9/36 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...