./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 f8d4c60b05266039fc5a952063ae52e513933a8f ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 f8d4c60b05266039fc5a952063ae52e513933a8f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:13:51,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:13:51,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:13:51,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:13:51,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:13:51,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:13:51,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:13:51,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:13:51,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:13:51,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:13:51,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:13:51,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:13:51,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:13:51,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:13:51,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:13:51,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:13:51,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:13:51,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:13:51,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:13:51,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:13:51,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:13:51,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:13:51,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:13:51,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:13:51,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:13:51,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:13:51,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:13:51,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:13:51,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:13:51,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:13:51,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:13:51,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:13:51,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:13:51,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:13:51,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:13:51,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:13:51,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:13:51,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:13:51,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:13:51,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:13:51,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:13:51,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:13:51,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:13:51,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:13:51,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:13:51,578 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:13:51,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:13:51,578 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:13:51,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:13:51,579 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:13:51,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:13:51,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:13:51,579 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:13:51,579 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:13:51,579 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:13:51,579 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:13:51,579 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:13:51,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:13:51,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:13:51,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:13:51,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:13:51,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:13:51,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:13:51,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:13:51,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:13:51,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:13:51,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:13:51,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:13:51,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:13:51,582 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:13:51,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:13:51,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:13:51,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:13:51,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:13:51,583 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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d4c60b05266039fc5a952063ae52e513933a8f [2020-12-09 07:13:51,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:13:51,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:13:51,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:13:51,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:13:51,797 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:13:51,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2020-12-09 07:13:51,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/7102f985d/d23551475a434dee85e2309de2edc43a/FLAG42088d079 [2020-12-09 07:13:52,210 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:13:52,211 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2020-12-09 07:13:52,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/7102f985d/d23551475a434dee85e2309de2edc43a/FLAG42088d079 [2020-12-09 07:13:52,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/7102f985d/d23551475a434dee85e2309de2edc43a [2020-12-09 07:13:52,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:13:52,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:13:52,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:13:52,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:13:52,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:13:52,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59e58df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52, skipping insertion in model container [2020-12-09 07:13:52,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:13:52,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:13:52,767 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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2020-12-09 07:13:52,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:13:52,783 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:13:52,792 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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2020-12-09 07:13:52,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:13:52,806 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:13:52,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52 WrapperNode [2020-12-09 07:13:52,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:13:52,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:13:52,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:13:52,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:13:52,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:13:52,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:13:52,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:13:52,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:13:52,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... [2020-12-09 07:13:52,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:13:52,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:13:52,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:13:52,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:13:52,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:13:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:13:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:13:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:13:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:13:53,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:13:53,114 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 07:13:53,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:13:53 BoogieIcfgContainer [2020-12-09 07:13:53,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:13:53,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:13:53,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:13:53,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:13:53,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:13:52" (1/3) ... [2020-12-09 07:13:53,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511544f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:13:53, skipping insertion in model container [2020-12-09 07:13:53,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:52" (2/3) ... [2020-12-09 07:13:53,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511544f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:13:53, skipping insertion in model container [2020-12-09 07:13:53,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:13:53" (3/3) ... [2020-12-09 07:13:53,123 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound10.c [2020-12-09 07:13:53,136 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:13:53,138 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 07:13:53,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 07:13:53,165 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:13:53,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:13:53,166 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:13:53,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:13:53,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:13:53,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:13:53,166 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:13:53,166 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:13:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 07:13:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:13:53,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:13:53,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:13:53,179 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:13:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:13:53,183 INFO L82 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2020-12-09 07:13:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:13:53,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853416702] [2020-12-09 07:13:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:13:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:13:53,288 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 07:13:53,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853416702] [2020-12-09 07:13:53,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:13:53,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:13:53,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814433962] [2020-12-09 07:13:53,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:13:53,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:13:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:13:53,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:13:53,308 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-09 07:13:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:13:53,322 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-12-09 07:13:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:13:53,323 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 07:13:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:13:53,331 INFO L225 Difference]: With dead ends: 33 [2020-12-09 07:13:53,331 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 07:13:53,333 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 07:13:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 07:13:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 07:13:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 07:13:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 07:13:53,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2020-12-09 07:13:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:13:53,355 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 07:13:53,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:13:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 07:13:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:13:53,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:13:53,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:13:53,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:13:53,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:13:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:13:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2020-12-09 07:13:53,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:13:53,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042972311] [2020-12-09 07:13:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:13:53,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:13:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950143631] [2020-12-09 07:13:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:13:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:13:53,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 07:13:53,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:13:53,484 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 07:13:53,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:13:53,509 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 07:13:53,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042972311] [2020-12-09 07:13:53,509 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:13:53,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950143631] [2020-12-09 07:13:53,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:13:53,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 07:13:53,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091822214] [2020-12-09 07:13:53,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:13:53,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:13:53,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:13:53,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:13:53,512 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-12-09 07:13:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:13:58,166 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-12-09 07:13:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:13:58,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 07:13:58,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:13:58,168 INFO L225 Difference]: With dead ends: 43 [2020-12-09 07:13:58,168 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 07:13:58,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:13:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 07:13:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-12-09 07:13:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 07:13:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-09 07:13:58,174 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2020-12-09 07:13:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:13:58,174 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-09 07:13:58,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:13:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-09 07:13:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 07:13:58,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:13:58,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:13:58,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 07:13:58,377 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:13:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:13:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2020-12-09 07:13:58,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:13:58,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873506450] [2020-12-09 07:13:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:13:58,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:13:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789310497] [2020-12-09 07:13:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:13:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:13:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 07:13:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:13:58,458 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 07:13:58,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:13:58,488 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 07:13:58,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873506450] [2020-12-09 07:13:58,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:13:58,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789310497] [2020-12-09 07:13:58,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702475790] [2020-12-09 07:13:58,503 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 07:13:58,503 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:13:58,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:13:58,510 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:13:58,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:13:58,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:14:00,838 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:14:12,754 WARN L197 SmtUtils]: Spent 9.74 s on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-09 07:14:24,491 WARN L197 SmtUtils]: Spent 11.55 s on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 07:16:10,749 WARN L197 SmtUtils]: Spent 1.77 m on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-09 07:16:11,029 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-09 07:16:13,848 WARN L197 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-12-09 07:16:13,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:16:13,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:16:13,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-09 07:16:13,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016900202] [2020-12-09 07:16:13,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:16:13,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:16:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:16:13,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-09 07:16:13,852 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 8 states. [2020-12-09 07:16:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:16:13,913 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-12-09 07:16:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 07:16:13,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 07:16:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:16:13,914 INFO L225 Difference]: With dead ends: 55 [2020-12-09 07:16:13,914 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 07:16:13,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 133.0s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-12-09 07:16:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 07:16:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-12-09 07:16:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 07:16:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-09 07:16:13,921 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2020-12-09 07:16:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:16:13,922 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-09 07:16:13,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:16:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-09 07:16:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 07:16:13,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:16:13,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-12-09 07:16:14,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:16:14,124 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:16:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:16:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash -468451453, now seen corresponding path program 1 times [2020-12-09 07:16:14,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:16:14,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14918523] [2020-12-09 07:16:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:16:14,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:16:14,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502045823] [2020-12-09 07:16:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:16:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:16:14,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 07:16:14,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:16:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:16:14,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:16:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14918523] [2020-12-09 07:16:14,318 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:16:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502045823] [2020-12-09 07:16:14,318 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 07:16:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613720281] [2020-12-09 07:16:14,320 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 07:16:14,320 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:16:14,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:16:14,320 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:16:14,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:16:14,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:16:14,492 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:16:24,152 WARN L197 SmtUtils]: Spent 7.52 s on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-09 07:18:18,875 WARN L197 SmtUtils]: Spent 1.81 m on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 07:18:26,343 WARN L197 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-09 07:18:26,344 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:18:26,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:18:26,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 07:18:26,345 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 07:18:26,345 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:18:26,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-09 07:18:26,560 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 07:18:26,561 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 07:18:26,581 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 07:18:26,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:18:26 BoogieIcfgContainer [2020-12-09 07:18:26,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:18:26,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:18:26,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:18:26,582 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:18:26,583 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:13:53" (3/4) ... [2020-12-09 07:18:26,584 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 07:18:26,585 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:18:26,585 INFO L168 Benchmark]: Toolchain (without parser) took 273940.47 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 58.1 MB in the beginning and 69.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:18:26,586 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 74.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:18:26,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.91 ms. Allocated memory is still 98.6 MB. Free memory was 58.0 MB in the beginning and 73.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:18:26,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.37 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 72.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:18:26,587 INFO L168 Benchmark]: Boogie Preprocessor took 18.61 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 71.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:18:26,587 INFO L168 Benchmark]: RCFGBuilder took 264.27 ms. Allocated memory is still 98.6 MB. Free memory was 71.3 MB in the beginning and 66.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:18:26,588 INFO L168 Benchmark]: TraceAbstraction took 273464.60 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 65.9 MB in the beginning and 69.6 MB in the end (delta: -3.7 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. [2020-12-09 07:18:26,588 INFO L168 Benchmark]: Witness Printer took 2.52 ms. Allocated memory is still 119.5 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:18:26,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 74.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 157.91 ms. Allocated memory is still 98.6 MB. Free memory was 58.0 MB in the beginning and 73.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.37 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 72.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.61 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 71.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 264.27 ms. Allocated memory is still 98.6 MB. Free memory was 71.3 MB in the beginning and 66.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 273464.60 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 65.9 MB in the beginning and 69.6 MB in the end (delta: -3.7 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. * Witness Printer took 2.52 ms. Allocated memory is still 119.5 MB. Free memory is still 69.6 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++<10 [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++<10 [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++<10 [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: 273.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 56 SDslu, 83 SDs, 0 SdLazy, 40 SolverSat, 26 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 133.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=3, 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, 3 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 838 SizeOfPredicates, 7 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:18:28,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:18:28,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:18:28,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:18:28,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:18:28,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:18:28,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:18:28,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:18:28,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:18:28,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:18:28,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:18:28,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:18:28,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:18:28,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:18:28,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:18:28,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:18:28,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:18:28,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:18:28,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:18:28,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:18:28,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:18:28,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:18:28,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:18:28,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:18:28,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:18:28,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:18:28,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:18:28,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:18:28,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:18:28,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:18:28,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:18:28,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:18:28,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:18:28,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:18:28,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:18:28,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:18:28,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:18:28,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:18:28,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:18:28,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:18:28,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:18:28,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 07:18:28,183 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:18:28,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:18:28,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:18:28,184 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:18:28,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:18:28,184 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:18:28,184 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:18:28,185 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:18:28,185 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:18:28,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:18:28,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:18:28,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:18:28,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:18:28,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:18:28,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:18:28,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:18:28,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:18:28,187 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 07:18:28,187 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 07:18:28,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:18:28,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:18:28,187 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:18:28,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:18:28,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:18:28,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 07:18:28,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:18:28,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:18:28,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:18:28,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:18:28,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:18:28,189 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 07:18:28,189 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 07:18:28,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:18:28,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:18:28,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:18:28,189 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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d4c60b05266039fc5a952063ae52e513933a8f [2020-12-09 07:18:28,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:18:28,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:18:28,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:18:28,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:18:28,440 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:18:28,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2020-12-09 07:18:28,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/78d3893e2/274f24be40514274a80c19aaa3ee82b4/FLAGd99f5df61 [2020-12-09 07:18:28,899 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:18:28,899 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2020-12-09 07:18:28,904 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/78d3893e2/274f24be40514274a80c19aaa3ee82b4/FLAGd99f5df61 [2020-12-09 07:18:28,917 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/data/78d3893e2/274f24be40514274a80c19aaa3ee82b4 [2020-12-09 07:18:28,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:18:28,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:18:28,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:18:28,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:18:28,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:18:28,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:18:28" (1/1) ... [2020-12-09 07:18:28,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6457a56b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:28, skipping insertion in model container [2020-12-09 07:18:28,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:18:28" (1/1) ... [2020-12-09 07:18:28,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:18:28,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:18:29,044 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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2020-12-09 07:18:29,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:18:29,073 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:18:29,082 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_dbdee6af-60bf-4003-a106-e89ca9c5e65f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2020-12-09 07:18:29,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:18:29,103 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:18:29,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29 WrapperNode [2020-12-09 07:18:29,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:18:29,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:18:29,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:18:29,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:18:29,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:18:29,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:18:29,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:18:29,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:18:29,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... [2020-12-09 07:18:29,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:18:29,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:18:29,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:18:29,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:18:29,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:18:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 07:18:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:18:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:18:29,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:18:30,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:18:30,339 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 07:18:30,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:18:30 BoogieIcfgContainer [2020-12-09 07:18:30,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:18:30,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:18:30,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:18:30,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:18:30,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:18:28" (1/3) ... [2020-12-09 07:18:30,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52be71fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:18:30, skipping insertion in model container [2020-12-09 07:18:30,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:29" (2/3) ... [2020-12-09 07:18:30,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52be71fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:18:30, skipping insertion in model container [2020-12-09 07:18:30,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:18:30" (3/3) ... [2020-12-09 07:18:30,349 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound10.c [2020-12-09 07:18:30,362 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:18:30,366 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 07:18:30,373 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 07:18:30,394 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:18:30,394 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:18:30,394 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:18:30,394 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:18:30,394 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:18:30,394 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:18:30,394 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:18:30,395 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:18:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-09 07:18:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 07:18:30,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:18:30,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:18:30,408 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:18:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:18:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-09 07:18:30,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:18:30,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602221357] [2020-12-09 07:18:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:18:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:18:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 07:18:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:18:30,635 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 07:18:30,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:18:30,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602221357] [2020-12-09 07:18:30,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:18:30,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:18:30,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910001147] [2020-12-09 07:18:30,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:18:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:18:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:18:30,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:18:30,657 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-09 07:18:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:18:30,672 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-09 07:18:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:18:30,674 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 07:18:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:18:30,681 INFO L225 Difference]: With dead ends: 41 [2020-12-09 07:18:30,681 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 07:18:30,683 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 07:18:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 07:18:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 07:18:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 07:18:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 07:18:30,704 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-09 07:18:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:18:30,705 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 07:18:30,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:18:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 07:18:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 07:18:30,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:18:30,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:18:30,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 07:18:30,906 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:18:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:18:30,907 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-09 07:18:30,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:18:30,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971361590] [2020-12-09 07:18:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:18:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:18:31,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 07:18:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:18:31,207 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 07:18:31,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:18:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971361590] [2020-12-09 07:18:31,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:18:31,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 07:18:31,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711910987] [2020-12-09 07:18:31,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:18:31,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:18:31,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:18:31,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:18:31,210 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-12-09 07:18:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:18:32,573 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-09 07:18:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:18:32,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 07:18:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:18:32,574 INFO L225 Difference]: With dead ends: 36 [2020-12-09 07:18:32,574 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 07:18:32,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:18:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 07:18:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-09 07:18:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 07:18:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 07:18:32,580 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-09 07:18:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:18:32,581 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 07:18:32,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:18:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 07:18:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 07:18:32,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:18:32,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:18:32,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 07:18:32,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:18:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:18:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-09 07:18:32,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:18:32,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233240514] [2020-12-09 07:18:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:18:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:18:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 07:18:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:18:33,852 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 07:18:34,108 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 07:18:34,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:18:38,477 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 07:18:40,984 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 07:18:40,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233240514] [2020-12-09 07:18:40,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [401618460] [2020-12-09 07:18:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:18:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:18:41,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 07:18:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:18:42,002 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 07:18:42,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:18:43,999 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 07:18:43,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167773208] [2020-12-09 07:18:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:18:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:18:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 07:18:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:18:45,583 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 07:18:45,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:18:47,312 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 07:18:47,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 07:18:47,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 6, 4] total 8 [2020-12-09 07:18:47,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177306245] [2020-12-09 07:18:47,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:18:47,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:18:47,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:18:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:18:47,314 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-12-09 07:18:49,552 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 07:18:54,184 WARN L197 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 07:18:54,977 WARN L197 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 07:19:00,804 WARN L197 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 07:19:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:19:00,806 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 07:19:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 07:19:00,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 07:19:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:19:00,807 INFO L225 Difference]: With dead ends: 32 [2020-12-09 07:19:00,807 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 07:19:00,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-09 07:19:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 07:19:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2020-12-09 07:19:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 07:19:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 07:19:00,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-12-09 07:19:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:19:00,812 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 07:19:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:19:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 07:19:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 07:19:00,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:19:00,813 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:19:01,415 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 07:19:01,417 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:19:01,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:19:01,418 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-09 07:19:01,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:19:01,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128638405] [2020-12-09 07:19:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:19:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:19:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 07:19:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:19:01,924 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 07:19:01,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:19:02,031 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 07:19:02,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128638405] [2020-12-09 07:19:02,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1958930723] [2020-12-09 07:19:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:19:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:19:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 07:19:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:19:02,824 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 07:19:02,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:19:02,835 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 07:19:02,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000217433] [2020-12-09 07:19:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:19:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:19:03,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 07:19:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:19:03,993 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 07:19:03,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:19:04,005 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 07:19:04,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 07:19:04,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2020-12-09 07:19:04,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961295496] [2020-12-09 07:19:04,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:19:04,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:19:04,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:19:04,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:19:04,007 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-09 07:19:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:19:06,041 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-12-09 07:19:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 07:19:06,041 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-09 07:19:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:19:06,042 INFO L225 Difference]: With dead ends: 46 [2020-12-09 07:19:06,042 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 07:19:06,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-09 07:19:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 07:19:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-12-09 07:19:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 07:19:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-09 07:19:06,048 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2020-12-09 07:19:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:19:06,049 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-09 07:19:06,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:19:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-09 07:19:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 07:19:06,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:19:06,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:19:06,651 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 07:19:06,653 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:19:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:19:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-09 07:19:06,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:19:06,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396973913] [2020-12-09 07:19:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:19:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:19:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 07:19:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:19:07,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 07:19:07,450 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 07:19:07,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:19:08,899 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:19:10,312 WARN L197 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-09 07:19:12,519 WARN L197 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 07:19:12,538 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 07:19:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396973913] [2020-12-09 07:19:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2078406861] [2020-12-09 07:19:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:19:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:19:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 07:19:13,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:19:13,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 07:19:13,528 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 07:19:13,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:19:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:19:15,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167693813] [2020-12-09 07:19:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:19:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:19:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 07:19:16,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:19:18,141 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 07:19:21,753 WARN L197 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-12-09 07:19:21,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 07:19:21,806 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 07:19:21,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:19:23,669 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 07:19:23,679 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 07:19:23,680 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 07:19:33,832 WARN L197 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 07:19:42,316 WARN L197 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 71 [2020-12-09 07:19:42,356 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 07:19:42,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 07:19:42,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 10, 8] total 21 [2020-12-09 07:19:42,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143243933] [2020-12-09 07:19:42,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 07:19:42,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:19:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 07:19:42,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-12-09 07:19:42,358 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 21 states. [2020-12-09 07:19:46,590 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 07:19:49,134 WARN L197 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 07:19:50,433 WARN L197 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-12-09 07:19:56,051 WARN L197 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-09 07:19:59,721 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-09 07:20:04,616 WARN L197 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-09 07:20:09,626 WARN L197 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 07:20:18,620 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 07:20:28,014 WARN L197 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-12-09 07:20:31,017 WARN L197 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-12-09 07:20:37,119 WARN L197 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-09 07:20:40,702 WARN L197 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 07:20:48,216 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-09 07:20:53,129 WARN L197 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 07:20:58,991 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-09 07:21:02,780 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-12-09 07:21:07,150 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-09 07:21:12,568 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 07:21:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:21:12,884 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-09 07:21:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-09 07:21:12,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 17 [2020-12-09 07:21:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:21:12,898 INFO L225 Difference]: With dead ends: 50 [2020-12-09 07:21:12,898 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 07:21:12,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 96.2s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 07:21:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 07:21:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-09 07:21:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 07:21:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-09 07:21:12,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2020-12-09 07:21:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:21:12,906 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-09 07:21:12,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 07:21:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-09 07:21:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 07:21:12,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:21:12,907 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:21:13,508 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 07:21:13,510 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:21:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:21:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1901162899, now seen corresponding path program 2 times [2020-12-09 07:21:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:21:13,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146041305] [2020-12-09 07:21:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/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 07:21:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:21:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 07:21:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:21:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:14,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:21:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:15,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146041305] [2020-12-09 07:21:15,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451747500] [2020-12-09 07:21:15,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt [2020-12-09 07:21:17,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 07:21:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:21:17,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 07:21:17,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:21:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:17,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:21:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:17,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493891275] [2020-12-09 07:21:17,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:21:18,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 07:21:18,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:21:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 07:21:18,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:21:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:18,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:21:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:19,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 07:21:19,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 19 [2020-12-09 07:21:19,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017338934] [2020-12-09 07:21:19,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 07:21:19,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:21:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 07:21:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-09 07:21:19,390 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 20 states. [2020-12-09 07:21:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:21:27,628 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-12-09 07:21:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-09 07:21:27,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-12-09 07:21:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:21:27,630 INFO L225 Difference]: With dead ends: 88 [2020-12-09 07:21:27,630 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 07:21:27,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-12-09 07:21:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 07:21:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-12-09 07:21:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 07:21:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-12-09 07:21:27,642 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 27 [2020-12-09 07:21:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:21:27,642 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-12-09 07:21:27,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 07:21:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-12-09 07:21:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 07:21:27,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:21:27,643 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:21:28,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt,13 mathsat -unsat_core_generation=3,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:21:28,246 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:21:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:21:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash -736656116, now seen corresponding path program 2 times [2020-12-09 07:21:28,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:21:28,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308721832] [2020-12-09 07:21:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 07:21:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:21:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 07:21:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:21:30,050 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 07:21:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:30,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:21:31,855 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:21:33,340 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-09 07:21:35,338 WARN L197 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 07:21:38,687 WARN L197 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-09 07:21:41,369 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-09 07:21:44,550 WARN L197 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-09 07:21:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:44,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308721832] [2020-12-09 07:21:44,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [291615122] [2020-12-09 07:21:44,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt [2020-12-09 07:21:46,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 07:21:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:21:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 07:21:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:21:47,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 07:21:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:47,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:21:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:21:47,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287445747] [2020-12-09 07:21:47,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:21:48,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 07:21:48,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:21:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 07:21:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:21:49,864 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 07:21:52,071 WARN L197 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-09 07:21:57,982 WARN L197 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-12-09 07:21:59,726 WARN L197 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 07:22:02,407 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-12-09 07:22:06,916 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 74 DAG size of output: 28 [2020-12-09 07:22:06,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 07:22:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:22:07,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:22:09,794 WARN L197 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 07:22:09,799 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 07:22:09,799 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 07:22:21,681 WARN L197 SmtUtils]: Spent 3.49 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 07:22:31,188 WARN L197 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 71 [2020-12-09 07:22:44,054 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 85 [2020-12-09 07:22:57,299 WARN L197 SmtUtils]: Spent 4.20 s on a formula simplification that was a NOOP. DAG size: 87 [2020-12-09 07:22:57,309 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 07:22:57,309 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 07:23:16,444 WARN L197 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 91 [2020-12-09 07:23:32,002 WARN L197 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-12-09 07:23:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:23:32,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 07:23:32,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 14, 12] total 34 [2020-12-09 07:23:32,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788912549] [2020-12-09 07:23:32,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-09 07:23:32,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:23:32,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-09 07:23:32,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 07:23:32,069 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 34 states. [2020-12-09 07:23:42,331 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-12-09 07:23:42,730 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 07:23:48,431 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-09 07:23:52,727 WARN L197 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-09 07:23:58,392 WARN L197 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-12-09 07:24:01,421 WARN L197 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-09 07:24:03,510 WARN L197 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 07:24:14,839 WARN L197 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-12-09 07:24:23,242 WARN L197 SmtUtils]: Spent 6.83 s on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-12-09 07:24:30,687 WARN L197 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-09 07:24:38,811 WARN L197 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-09 07:24:50,607 WARN L197 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-09 07:24:58,951 WARN L197 SmtUtils]: Spent 5.27 s on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-12-09 07:25:07,182 WARN L197 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-09 07:25:13,740 WARN L197 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-09 07:25:22,794 WARN L197 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-09 07:25:29,397 WARN L197 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-09 07:25:35,933 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-09 07:25:41,360 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-12-09 07:25:48,744 WARN L197 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-09 07:25:55,142 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-12-09 07:26:08,993 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-09 07:26:17,038 WARN L197 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-12-09 07:26:23,658 WARN L197 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-12-09 07:26:44,897 WARN L197 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-09 07:26:52,128 WARN L197 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-09 07:26:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:26:52,582 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-12-09 07:26:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-09 07:26:52,600 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 29 [2020-12-09 07:26:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:26:52,601 INFO L225 Difference]: With dead ends: 70 [2020-12-09 07:26:52,601 INFO L226 Difference]: Without dead ends: 60 [2020-12-09 07:26:52,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 272.6s TimeCoverageRelationStatistics Valid=941, Invalid=2841, Unknown=0, NotChecked=0, Total=3782 [2020-12-09 07:26:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-09 07:26:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-12-09 07:26:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 07:26:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-09 07:26:52,617 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 29 [2020-12-09 07:26:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:26:52,617 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-09 07:26:52,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-09 07:26:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-09 07:26:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-09 07:26:52,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:26:52,618 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:26:53,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt [2020-12-09 07:26:53,220 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:26:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:26:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1889161739, now seen corresponding path program 3 times [2020-12-09 07:26:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:26:53,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74473081] [2020-12-09 07:26:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-12-09 07:26:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:26:56,503 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:26:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:26:59,999 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:27:00,299 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 07:27:00,299 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:27:00,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-12-09 07:27:00,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:27:00 BoogieIcfgContainer [2020-12-09 07:27:00,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:27:00,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:27:00,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:27:00,575 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:27:00,575 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:18:30" (3/4) ... [2020-12-09 07:27:00,577 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:27:00,624 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dbdee6af-60bf-4003-a106-e89ca9c5e65f/bin/utaipan/witness.graphml [2020-12-09 07:27:00,624 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:27:00,625 INFO L168 Benchmark]: Toolchain (without parser) took 511704.81 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 35.0 MB in the beginning and 66.2 MB in the end (delta: -31.2 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:00,626 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 39.2 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:27:00,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.50 ms. Allocated memory is still 56.6 MB. Free memory was 34.9 MB in the beginning and 38.0 MB in the end (delta: -3.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:00,627 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.27 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 38.0 MB in the beginning and 72.6 MB in the end (delta: -34.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:00,627 INFO L168 Benchmark]: Boogie Preprocessor took 20.84 ms. Allocated memory is still 88.1 MB. Free memory was 72.6 MB in the beginning and 71.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:27:00,627 INFO L168 Benchmark]: RCFGBuilder took 1172.72 ms. Allocated memory is still 88.1 MB. Free memory was 71.1 MB in the beginning and 57.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:00,627 INFO L168 Benchmark]: TraceAbstraction took 510231.60 ms. Allocated memory is still 88.1 MB. Free memory was 56.4 MB in the beginning and 25.8 MB in the end (delta: 30.6 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:00,628 INFO L168 Benchmark]: Witness Printer took 49.99 ms. Allocated memory is still 88.1 MB. Free memory was 25.8 MB in the beginning and 66.2 MB in the end (delta: -40.4 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:00,629 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 39.3 MB in the beginning and 39.2 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.50 ms. Allocated memory is still 56.6 MB. Free memory was 34.9 MB in the beginning and 38.0 MB in the end (delta: -3.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.27 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 38.0 MB in the beginning and 72.6 MB in the end (delta: -34.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.84 ms. Allocated memory is still 88.1 MB. Free memory was 72.6 MB in the beginning and 71.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1172.72 ms. Allocated memory is still 88.1 MB. Free memory was 71.1 MB in the beginning and 57.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 510231.60 ms. Allocated memory is still 88.1 MB. Free memory was 56.4 MB in the beginning and 25.8 MB in the end (delta: 30.6 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. * Witness Printer took 49.99 ms. Allocated memory is still 88.1 MB. Free memory was 25.8 MB in the beginning and 66.2 MB in the end (delta: -40.4 MB). Peak memory consumption was 4.6 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++<10 [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++<10 [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 TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=3] [L28] EXPR counter++ VAL [counter=4] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=4] [L28] EXPR counter++ VAL [counter=5] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=5] [L28] EXPR counter++ VAL [counter=6] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=6] [L28] EXPR counter++ VAL [counter=7] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=7] [L28] EXPR counter++ VAL [counter=8] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=8] [L28] EXPR counter++ VAL [counter=9] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=9] [L28] EXPR counter++ VAL [counter=10] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=10] [L28] EXPR counter++ VAL [counter=11] [L28] COND FALSE !(counter++<10) [L10] COND FALSE !(!(cond)) VAL [counter=11] [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 510.1s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 316.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 602 SDslu, 430 SDs, 0 SdLazy, 533 SolverSat, 322 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 82.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 487 SyntacticMatches, 23 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 394.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 67 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 17.6s SatisfiabilityAnalysisTime, 168.1s InterpolantComputationTime, 367 NumberOfCodeBlocks, 367 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 584 ConstructedInterpolants, 4 QuantifiedInterpolants, 330687 SizeOfPredicates, 73 NumberOfNonLiveVariables, 1000 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 6/486 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...