./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/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 02b49c30f483a6aa3961a4e1c70cfb198ad8047e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/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 02b49c30f483a6aa3961a4e1c70cfb198ad8047e ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 16:03:03,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:03:03,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:03:03,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:03:03,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:03:03,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:03:03,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:03:03,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:03:03,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:03:03,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:03:03,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:03:03,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:03:03,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:03:03,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:03:03,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:03:03,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:03:03,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:03:03,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:03:03,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:03:03,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:03:03,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:03:03,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:03:03,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:03:03,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:03:03,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:03:03,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:03:03,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:03:03,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:03:03,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:03:03,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:03:03,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:03:03,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:03:03,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:03:03,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:03:03,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:03:03,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:03:03,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:03:03,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:03:03,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:03:03,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:03:03,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:03:03,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 16:03:03,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:03:03,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:03:03,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:03:03,507 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:03:03,507 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:03:03,507 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:03:03,507 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:03:03,507 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:03:03,507 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:03:03,508 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:03:03,508 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:03:03,508 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:03:03,508 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:03:03,508 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:03:03,509 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:03:03,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:03:03,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:03:03,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:03:03,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:03:03,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:03:03,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:03:03,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:03:03,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:03:03,511 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:03:03,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:03:03,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:03:03,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:03:03,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:03:03,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:03:03,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:03:03,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:03:03,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:03:03,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:03:03,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:03:03,512 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:03:03,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:03:03,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:03:03,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:03:03,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:03:03,513 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_d428a6df-263f-4b33-8b2e-992ef59dadcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02b49c30f483a6aa3961a4e1c70cfb198ad8047e [2020-12-09 16:03:03,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:03:03,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:03:03,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:03:03,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:03:03,719 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:03:03,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2020-12-09 16:03:03,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/e7e191101/59117a721b204944b30da0a65037ae8f/FLAGbec1641bc [2020-12-09 16:03:04,127 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:03:04,127 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2020-12-09 16:03:04,132 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/e7e191101/59117a721b204944b30da0a65037ae8f/FLAGbec1641bc [2020-12-09 16:03:04,531 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/e7e191101/59117a721b204944b30da0a65037ae8f [2020-12-09 16:03:04,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:03:04,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:03:04,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:03:04,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:03:04,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:03:04,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6532bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04, skipping insertion in model container [2020-12-09 16:03:04,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:03:04,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:03:04,652 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2020-12-09 16:03:04,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:03:04,680 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:03:04,691 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_d428a6df-263f-4b33-8b2e-992ef59dadcd/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2020-12-09 16:03:04,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:03:04,706 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:03:04,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04 WrapperNode [2020-12-09 16:03:04,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:03:04,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:03:04,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:03:04,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:03:04,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:03:04,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:03:04,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:03:04,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:03:04,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... [2020-12-09 16:03:04,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:03:04,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:03:04,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:03:04,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:03:04,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/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 16:03:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:03:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:03:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:03:04,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:03:05,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:03:05,041 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 16:03:05,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:03:05 BoogieIcfgContainer [2020-12-09 16:03:05,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:03:05,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:03:05,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:03:05,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:03:05,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:03:04" (1/3) ... [2020-12-09 16:03:05,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77fe9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:03:05, skipping insertion in model container [2020-12-09 16:03:05,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:04" (2/3) ... [2020-12-09 16:03:05,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77fe9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:03:05, skipping insertion in model container [2020-12-09 16:03:05,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:03:05" (3/3) ... [2020-12-09 16:03:05,051 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound2.c [2020-12-09 16:03:05,064 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:03:05,067 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 16:03:05,077 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 16:03:05,100 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:03:05,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:03:05,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:03:05,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:03:05,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:03:05,101 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:03:05,101 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:03:05,101 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:03:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 16:03:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:03:05,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:03:05,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:03:05,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:03:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:03:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2020-12-09 16:03:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:03:05,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324417523] [2020-12-09 16:03:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:03:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:03:05,220 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 16:03:05,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324417523] [2020-12-09 16:03:05,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:03:05,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:03:05,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102303626] [2020-12-09 16:03:05,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 16:03:05,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:03:05,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 16:03:05,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:03:05,238 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-09 16:03:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:03:05,250 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-12-09 16:03:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:03:05,251 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 16:03:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:03:05,257 INFO L225 Difference]: With dead ends: 33 [2020-12-09 16:03:05,257 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 16:03:05,260 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 16:03:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 16:03:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 16:03:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 16:03:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 16:03:05,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2020-12-09 16:03:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:03:05,291 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 16:03:05,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 16:03:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 16:03:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:03:05,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:03:05,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:03:05,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:03:05,292 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:03:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:03:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2020-12-09 16:03:05,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:03:05,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622370560] [2020-12-09 16:03:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:03:05,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:03:05,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717835139] [2020-12-09 16:03:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:03:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:03:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 16:03:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:03:05,421 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 16:03:05,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:03:05,452 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 16:03:05,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622370560] [2020-12-09 16:03:05,453 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:03:05,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717835139] [2020-12-09 16:03:05,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:03:05,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 16:03:05,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418048569] [2020-12-09 16:03:05,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:03:05,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:03:05,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:03:05,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:03:05,456 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-12-09 16:03:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:03:07,573 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-12-09 16:03:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 16:03:07,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 16:03:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:03:07,575 INFO L225 Difference]: With dead ends: 43 [2020-12-09 16:03:07,575 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 16:03:07,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:03:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 16:03:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-12-09 16:03:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 16:03:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-09 16:03:07,584 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2020-12-09 16:03:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:03:07,584 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-09 16:03:07,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:03:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-09 16:03:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:03:07,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:03:07,585 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:03:07,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 16:03:07,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:03:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:03:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2020-12-09 16:03:07,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:03:07,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101155240] [2020-12-09 16:03:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:03:07,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:03:07,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723809052] [2020-12-09 16:03:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:03:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:03:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:03:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:03:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:03:07,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:03:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:03:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101155240] [2020-12-09 16:03:07,885 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:03:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723809052] [2020-12-09 16:03:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085726984] [2020-12-09 16:03:07,902 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 16:03:07,902 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:03:07,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:03:07,909 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:03:07,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:03:08,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:03:09,891 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:03:12,778 WARN L197 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-09 16:03:17,466 WARN L197 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 16:03:20,890 WARN L197 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-09 16:03:22,982 WARN L197 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 67 [2020-12-09 16:03:38,177 WARN L197 SmtUtils]: Spent 15.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-09 16:03:40,681 WARN L197 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-12-09 16:03:40,683 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:03:40,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 16:03:40,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-09 16:03:40,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618671336] [2020-12-09 16:03:40,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:03:40,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:03:40,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:03:40,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2020-12-09 16:03:40,684 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-12-09 16:03:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:03:40,712 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-09 16:03:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:03:40,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 16:03:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:03:40,713 INFO L225 Difference]: With dead ends: 31 [2020-12-09 16:03:40,713 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 16:03:40,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2020-12-09 16:03:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 16:03:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-09 16:03:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 16:03:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-09 16:03:40,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2020-12-09 16:03:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:03:40,717 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-09 16:03:40,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:03:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-09 16:03:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 16:03:40,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:03:40,718 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-12-09 16:03:40,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:03:40,919 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:03:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:03:40,921 INFO L82 PathProgramCache]: Analyzing trace with hash -468451453, now seen corresponding path program 1 times [2020-12-09 16:03:40,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:03:40,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96293298] [2020-12-09 16:03:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:03:40,937 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:03:40,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57090368] [2020-12-09 16:03:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:03:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:03:40,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 16:03:40,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:03:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:03:41,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:03:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:03:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96293298] [2020-12-09 16:03:41,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:03:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57090368] [2020-12-09 16:03:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992293256] [2020-12-09 16:03:41,021 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 16:03:41,022 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:03:41,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:03:41,022 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:03:41,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:03:41,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:03:41,190 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:04:23,820 WARN L197 SmtUtils]: Spent 42.61 s on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-09 16:04:41,659 WARN L197 SmtUtils]: Spent 17.64 s on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 16:04:48,423 WARN L197 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-09 16:04:48,424 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:04:48,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 16:04:48,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-12-09 16:04:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759404973] [2020-12-09 16:04:48,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:04:48,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:04:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:04:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-09 16:04:48,426 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-12-09 16:04:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:04:48,458 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-09 16:04:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:04:48,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 16:04:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:04:48,459 INFO L225 Difference]: With dead ends: 35 [2020-12-09 16:04:48,459 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 16:04:48,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-09 16:04:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 16:04:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 16:04:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 16:04:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-09 16:04:48,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 13 [2020-12-09 16:04:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:04:48,462 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-09 16:04:48,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:04:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-09 16:04:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 16:04:48,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:04:48,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:04:48,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 16:04:48,664 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:04:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:04:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1671355727, now seen corresponding path program 1 times [2020-12-09 16:04:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:04:48,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260597656] [2020-12-09 16:04:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:04:48,673 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:04:48,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663665681] [2020-12-09 16:04:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:04:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:04:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 16:04:48,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:04:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:04:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:04:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:04:48,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260597656] [2020-12-09 16:04:48,861 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:04:48,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663665681] [2020-12-09 16:04:48,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865422672] [2020-12-09 16:04:48,863 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 16:04:48,863 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:04:48,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:04:48,864 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:04:48,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:04:48,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:04:49,072 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:08:59,250 WARN L197 SmtUtils]: Spent 4.17 m on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-09 16:09:06,749 WARN L197 SmtUtils]: Spent 6.31 s on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 16:10:21,251 WARN L197 SmtUtils]: Spent 1.24 m on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-09 16:10:23,537 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-09 16:10:30,663 WARN L197 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-09 16:10:30,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:10:30,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 16:10:30,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-09 16:10:30,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141495129] [2020-12-09 16:10:30,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 16:10:30,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:10:30,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 16:10:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-12-09 16:10:30,666 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-12-09 16:10:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:10:33,105 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2020-12-09 16:10:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 16:10:33,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-09 16:10:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:10:33,106 INFO L225 Difference]: With dead ends: 25 [2020-12-09 16:10:33,106 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 16:10:33,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 341.9s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-12-09 16:10:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 16:10:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 16:10:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 16:10:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-12-09 16:10:33,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 14 [2020-12-09 16:10:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:10:33,109 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-12-09 16:10:33,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 16:10:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-12-09 16:10:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 16:10:33,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:10:33,109 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 16:10:33,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:10:33,311 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:10:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:10:33,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1637136791, now seen corresponding path program 1 times [2020-12-09 16:10:33,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:10:33,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61822957] [2020-12-09 16:10:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:10:33,330 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:10:33,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675921380] [2020-12-09 16:10:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/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 [2020-12-09 16:10:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:10:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 16:10:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:10:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:10:33,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:10:33,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61822957] [2020-12-09 16:10:33,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:10:33,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675921380] [2020-12-09 16:10:33,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 16:10:33,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335443261] [2020-12-09 16:10:33,528 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 16:10:33,528 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:10:33,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:10:33,529 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:10:33,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:10:33,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:10:33,680 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:10:42,214 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| c_ULTIMATE.start___VERIFIER_assert_~cond) (<= c_ULTIMATE.start_assume_abort_if_not_~cond 1) (<= 0 c_ULTIMATE.start_main_~c~0) (<= 0 (+ c_ULTIMATE.start_main_~k~0 32768)) (<= 0 c_ULTIMATE.start_main_~y~0) (= |c_#NULL.base| 0) (let ((.cse0 (= (+ (* 6 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (* 10 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (* 15 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (+ c_ULTIMATE.start_main_~y~0 (* 30 c_ULTIMATE.start_main_~x~0))))) (or (and (not .cse0) (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| 0)) (and .cse0 (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| 1)))) (< c_~counter~0 3) (<= 0 |c_#t~string4.base|) (= |c_ULTIMATE.start_assume_abort_if_not_#in~cond| 1) (<= 1 c_~counter~0) (<= 0 |c_#t~string6.base|) (<= c_ULTIMATE.start_main_~k~0 256) (<= 0 |c_#t~string5.base|) (= |c_#t~string5.offset| 0) (<= 0 c_ULTIMATE.start_main_~x~0) (= |c_#NULL.offset| 0) (= |c_#t~string6.offset| 0) (= 0 |c_#t~string4.offset|) (<= 1 c_ULTIMATE.start_assume_abort_if_not_~cond) (<= 0 |c_#StackHeapBarrier|)) is different from false [2020-12-09 16:10:53,504 WARN L197 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-09 16:10:53,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:10:53,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:10:53,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 16:10:53,804 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 16:10:53,804 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:10:54,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:10:54,015 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:10:54,015 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:10:54,022 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 16:10:54,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:10:54 BoogieIcfgContainer [2020-12-09 16:10:54,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:10:54,023 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:10:54,023 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:10:54,023 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:10:54,024 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:03:05" (3/4) ... [2020-12-09 16:10:54,026 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 16:10:54,026 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:10:54,027 INFO L168 Benchmark]: Toolchain (without parser) took 469492.50 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 64.5 MB in the beginning and 35.9 MB in the end (delta: 28.6 MB). Peak memory consumption was 49.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:10:54,027 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 100.7 MB. Free memory is still 80.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:10:54,028 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.64 ms. Allocated memory is still 100.7 MB. Free memory was 64.3 MB in the beginning and 77.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:10:54,028 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.47 ms. Allocated memory is still 100.7 MB. Free memory was 77.7 MB in the beginning and 76.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:10:54,028 INFO L168 Benchmark]: Boogie Preprocessor took 14.29 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 75.2 MB in the end (delta: 789.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:10:54,029 INFO L168 Benchmark]: RCFGBuilder took 298.03 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 57.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:10:54,029 INFO L168 Benchmark]: TraceAbstraction took 468978.34 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.2 MB in the beginning and 35.9 MB in the end (delta: 21.3 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:10:54,030 INFO L168 Benchmark]: Witness Printer took 2.91 ms. Allocated memory is still 121.6 MB. Free memory is still 35.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:10:54,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 100.7 MB. Free memory is still 80.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 171.64 ms. Allocated memory is still 100.7 MB. Free memory was 64.3 MB in the beginning and 77.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.47 ms. Allocated memory is still 100.7 MB. Free memory was 77.7 MB in the beginning and 76.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.29 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 75.2 MB in the end (delta: 789.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 298.03 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 57.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 468978.34 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.2 MB in the beginning and 35.9 MB in the end (delta: 21.3 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. * Witness Printer took 2.91 ms. Allocated memory is still 121.6 MB. Free memory is still 35.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND TRUE !cond [L24] y = 0 [L25] x = 0 [L26] c = 0 [L28] EXPR counter++ [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x [L28] EXPR counter++ [L28] COND FALSE !(counter++<2) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 468.9s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 74 SDslu, 112 SDs, 0 SdLazy, 88 SolverSat, 42 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 132 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 440.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=2, 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, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 5350 SizeOfPredicates, 15 NumberOfNonLiveVariables, 316 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 16/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:10:55,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:10:55,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:10:55,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:10:55,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:10:55,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:10:55,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:10:55,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:10:55,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:10:55,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:10:55,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:10:55,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:10:55,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:10:55,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:10:55,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:10:55,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:10:55,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:10:55,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:10:55,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:10:55,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:10:55,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:10:55,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:10:55,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:10:55,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:10:55,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:10:55,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:10:55,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:10:55,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:10:55,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:10:55,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:10:55,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:10:55,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:10:55,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:10:55,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:10:55,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:10:55,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:10:55,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:10:55,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:10:55,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:10:55,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:10:55,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:10:55,624 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 16:10:55,644 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:10:55,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:10:55,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:10:55,645 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:10:55,646 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:10:55,646 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:10:55,646 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:10:55,646 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:10:55,646 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:10:55,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:10:55,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:10:55,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:10:55,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:10:55,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:10:55,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:10:55,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:10:55,648 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:10:55,648 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 16:10:55,649 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 16:10:55,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:10:55,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:10:55,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:10:55,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:10:55,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:10:55,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 16:10:55,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:10:55,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:10:55,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:10:55,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:10:55,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:10:55,656 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 16:10:55,656 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 16:10:55,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:10:55,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:10:55,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:10:55,657 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02b49c30f483a6aa3961a4e1c70cfb198ad8047e [2020-12-09 16:10:55,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:10:55,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:10:55,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:10:55,896 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:10:55,896 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:10:55,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2020-12-09 16:10:55,940 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/9a097d85c/6b251f19040b409fa1a9909ccb67ae07/FLAG7f3626958 [2020-12-09 16:10:56,341 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:10:56,341 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c [2020-12-09 16:10:56,347 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/9a097d85c/6b251f19040b409fa1a9909ccb67ae07/FLAG7f3626958 [2020-12-09 16:10:56,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/data/9a097d85c/6b251f19040b409fa1a9909ccb67ae07 [2020-12-09 16:10:56,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:10:56,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:10:56,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:10:56,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:10:56,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:10:56,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d1a3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56, skipping insertion in model container [2020-12-09 16:10:56,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:10:56,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:10:56,471 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_d428a6df-263f-4b33-8b2e-992ef59dadcd/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2020-12-09 16:10:56,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:10:56,492 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:10:56,501 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_d428a6df-263f-4b33-8b2e-992ef59dadcd/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2020-12-09 16:10:56,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:10:56,522 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:10:56,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56 WrapperNode [2020-12-09 16:10:56,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:10:56,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:10:56,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:10:56,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:10:56,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:10:56,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:10:56,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:10:56,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:10:56,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... [2020-12-09 16:10:56,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:10:56,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:10:56,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:10:56,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:10:56,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/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 16:10:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 16:10:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:10:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:10:56,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:10:57,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:10:57,792 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 16:10:57,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:10:57 BoogieIcfgContainer [2020-12-09 16:10:57,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:10:57,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:10:57,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:10:57,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:10:57,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:10:56" (1/3) ... [2020-12-09 16:10:57,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4995daf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:10:57, skipping insertion in model container [2020-12-09 16:10:57,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:10:56" (2/3) ... [2020-12-09 16:10:57,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4995daf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:10:57, skipping insertion in model container [2020-12-09 16:10:57,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:10:57" (3/3) ... [2020-12-09 16:10:57,799 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound2.c [2020-12-09 16:10:57,809 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:10:57,812 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 16:10:57,819 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 16:10:57,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:10:57,834 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:10:57,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:10:57,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:10:57,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:10:57,835 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:10:57,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:10:57,835 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:10:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-09 16:10:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 16:10:57,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:10:57,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:10:57,847 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:10:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:10:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-09 16:10:57,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:10:57,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410298020] [2020-12-09 16:10:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 16:10:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:10:58,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 16:10:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:10:58,058 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 16:10:58,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:10:58,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410298020] [2020-12-09 16:10:58,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:10:58,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:10:58,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447285724] [2020-12-09 16:10:58,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 16:10:58,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:10:58,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 16:10:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:10:58,072 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-09 16:10:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:10:58,082 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-09 16:10:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:10:58,083 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 16:10:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:10:58,089 INFO L225 Difference]: With dead ends: 41 [2020-12-09 16:10:58,089 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 16:10:58,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 16:10:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 16:10:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 16:10:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 16:10:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 16:10:58,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-09 16:10:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:10:58,112 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 16:10:58,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 16:10:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 16:10:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 16:10:58,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:10:58,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:10:58,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 16:10:58,314 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:10:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:10:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-09 16:10:58,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:10:58,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798554497] [2020-12-09 16:10:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 16:10:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:10:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:10:58,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:10:58,598 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 16:10:58,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:10:58,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798554497] [2020-12-09 16:10:58,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:10:58,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:10:58,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820085670] [2020-12-09 16:10:58,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:10:58,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:10:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:10:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:10:58,600 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-12-09 16:11:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:11:00,632 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-09 16:11:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:11:00,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 16:11:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:11:00,634 INFO L225 Difference]: With dead ends: 36 [2020-12-09 16:11:00,634 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 16:11:00,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 16:11:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 16:11:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-09 16:11:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 16:11:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 16:11:00,639 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-09 16:11:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:11:00,640 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 16:11:00,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:11:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 16:11:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:11:00,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:11:00,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:11:00,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 16:11:00,842 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:11:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:11:00,845 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-09 16:11:00,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:11:00,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054166657] [2020-12-09 16:11:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 16:11:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 16:11:01,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:01,874 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 16:11:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:02,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:05,432 WARN L197 SmtUtils]: Spent 956.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 16:11:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 16:11:07,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054166657] [2020-12-09 16:11:07,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1765509414] [2020-12-09 16:11:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:11:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 16:11:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:08,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 16:11:11,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557525953] [2020-12-09 16:11:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/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 [2020-12-09 16:11:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 16:11:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:13,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 16:11:16,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 16:11:16,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 6, 4] total 8 [2020-12-09 16:11:16,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341871834] [2020-12-09 16:11:16,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:11:16,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:11:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:11:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:11:16,358 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-12-09 16:11:18,727 WARN L197 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 16:11:23,743 WARN L197 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:11:24,439 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 16:11:30,612 WARN L197 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 16:11:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:11:30,613 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 16:11:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 16:11:30,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 16:11:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:11:30,615 INFO L225 Difference]: With dead ends: 32 [2020-12-09 16:11:30,615 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 16:11:30,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-09 16:11:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 16:11:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2020-12-09 16:11:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 16:11:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 16:11:30,620 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-12-09 16:11:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:11:30,620 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 16:11:30,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:11:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 16:11:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 16:11:30,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:11:30,621 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:11:31,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 16:11:31,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:11:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:11:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-09 16:11:31,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:11:31,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267043127] [2020-12-09 16:11:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 16:11:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:11:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:31,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:31,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267043127] [2020-12-09 16:11:31,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [39649134] [2020-12-09 16:11:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:11:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:11:32,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:32,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:32,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957694030] [2020-12-09 16:11:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:11:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:33,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:11:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:33,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:33,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 16:11:33,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2020-12-09 16:11:33,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326454172] [2020-12-09 16:11:33,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:11:33,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:11:33,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:11:33,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:11:34,000 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-09 16:11:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:11:35,395 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-12-09 16:11:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:11:35,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-09 16:11:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:11:35,397 INFO L225 Difference]: With dead ends: 26 [2020-12-09 16:11:35,397 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 16:11:35,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 16:11:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 16:11:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 16:11:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 16:11:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 16:11:35,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-12-09 16:11:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:11:35,401 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 16:11:35,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:11:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 16:11:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 16:11:35,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:11:35,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:11:36,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 16:11:36,006 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:11:36,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:11:36,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-09 16:11:36,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:11:36,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968312143] [2020-12-09 16:11:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 16:11:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 16:11:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:36,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:11:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:36,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:38,220 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 16:11:39,440 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-09 16:11:41,556 WARN L197 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 16:11:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:41,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968312143] [2020-12-09 16:11:41,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493446650] [2020-12-09 16:11:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:11:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 16:11:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:42,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:11:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:42,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:43,572 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 16:11:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:43,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457901611] [2020-12-09 16:11:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:11:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:11:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 16:11:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:11:46,156 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 16:11:49,151 WARN L197 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-12-09 16:11:49,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:11:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:11:49,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:11:51,374 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 16:11:51,384 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 16:11:51,385 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:12:02,004 WARN L197 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:12:10,021 WARN L197 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 71 [2020-12-09 16:12:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:12:10,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 16:12:10,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 10, 8] total 21 [2020-12-09 16:12:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183646749] [2020-12-09 16:12:10,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 16:12:10,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:12:10,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 16:12:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-12-09 16:12:10,062 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 21 states. [2020-12-09 16:12:14,098 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 16:12:16,935 WARN L197 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 16:12:18,315 WARN L197 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-12-09 16:12:23,039 WARN L197 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-09 16:12:27,247 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-09 16:12:30,880 WARN L197 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-09 16:12:36,554 WARN L197 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 16:12:45,625 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 16:12:52,738 WARN L197 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-12-09 16:12:57,522 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-12-09 16:13:02,959 WARN L197 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-09 16:13:07,468 WARN L197 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 16:13:15,616 WARN L197 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-09 16:13:20,609 WARN L197 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 16:13:26,075 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-09 16:13:30,637 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-12-09 16:13:34,510 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-09 16:13:39,379 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 16:13:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:13:40,340 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-09 16:13:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-09 16:13:40,360 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 17 [2020-12-09 16:13:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:13:40,361 INFO L225 Difference]: With dead ends: 62 [2020-12-09 16:13:40,361 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 16:13:40,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 94.8s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 16:13:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 16:13:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2020-12-09 16:13:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 16:13:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-09 16:13:40,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2020-12-09 16:13:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:13:40,370 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-09 16:13:40,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 16:13:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-09 16:13:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 16:13:40,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:13:40,371 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:13:40,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt [2020-12-09 16:13:40,974 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:13:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:13:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2020-12-09 16:13:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:13:40,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61380815] [2020-12-09 16:13:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 16:13:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:13:41,718 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:13:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:13:42,520 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:13:42,605 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 16:13:42,605 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:13:42,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 16:13:42,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:13:42 BoogieIcfgContainer [2020-12-09 16:13:42,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:13:42,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:13:42,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:13:42,864 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:13:42,864 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:10:57" (3/4) ... [2020-12-09 16:13:42,865 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 16:13:42,898 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d428a6df-263f-4b33-8b2e-992ef59dadcd/bin/utaipan/witness.graphml [2020-12-09 16:13:42,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:13:42,899 INFO L168 Benchmark]: Toolchain (without parser) took 166539.12 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 36.1 MB in the beginning and 46.7 MB in the end (delta: -10.7 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:42,899 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.3 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:13:42,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.55 ms. Allocated memory is still 56.6 MB. Free memory was 35.9 MB in the beginning and 40.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:42,900 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.88 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 40.8 MB in the beginning and 55.5 MB in the end (delta: -14.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:42,900 INFO L168 Benchmark]: Boogie Preprocessor took 23.95 ms. Allocated memory is still 71.3 MB. Free memory was 55.5 MB in the beginning and 54.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:42,900 INFO L168 Benchmark]: RCFGBuilder took 1210.95 ms. Allocated memory is still 71.3 MB. Free memory was 54.1 MB in the beginning and 40.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:42,901 INFO L168 Benchmark]: TraceAbstraction took 165068.78 ms. Allocated memory is still 71.3 MB. Free memory was 40.0 MB in the beginning and 49.5 MB in the end (delta: -9.5 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:42,901 INFO L168 Benchmark]: Witness Printer took 34.20 ms. Allocated memory is still 71.3 MB. Free memory was 49.5 MB in the beginning and 46.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:42,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.3 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 162.55 ms. Allocated memory is still 56.6 MB. Free memory was 35.9 MB in the beginning and 40.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.88 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 40.8 MB in the beginning and 55.5 MB in the end (delta: -14.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.95 ms. Allocated memory is still 71.3 MB. Free memory was 55.5 MB in the beginning and 54.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1210.95 ms. Allocated memory is still 71.3 MB. Free memory was 54.1 MB in the beginning and 40.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 165068.78 ms. Allocated memory is still 71.3 MB. Free memory was 40.0 MB in the beginning and 49.5 MB in the end (delta: -9.5 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. * Witness Printer took 34.20 ms. Allocated memory is still 71.3 MB. Free memory was 49.5 MB in the beginning and 46.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND FALSE !(counter++<2) [L10] COND FALSE !(!(cond)) VAL [counter=3] [L10] COND TRUE !(cond) VAL [counter=3] [L12] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 164.9s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 108.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 204 SDslu, 172 SDs, 0 SdLazy, 208 SolverSat, 121 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 32.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 291 GetRequests, 215 SyntacticMatches, 14 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 118.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 5 MinimizatonAttempts, 31 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 7.0s SatisfiabilityAnalysisTime, 46.2s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 260 ConstructedInterpolants, 4 QuantifiedInterpolants, 51693 SizeOfPredicates, 38 NumberOfNonLiveVariables, 514 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 6/54 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...