./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs --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 09575df3d22e9082519fef8b3f639469f79418a93deb54dd64ac9991de61e42a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:40:56,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:40:56,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:40:56,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:40:56,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:40:56,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:40:56,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:40:56,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:40:56,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:40:56,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:40:56,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:40:56,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:40:56,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:40:56,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:40:56,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:40:56,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:40:56,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:40:56,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:40:56,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:40:56,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:40:56,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:40:56,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:40:56,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:40:56,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:40:56,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:40:56,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:40:56,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:40:56,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:40:56,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:40:56,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:40:56,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:40:56,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:40:56,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:40:56,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:40:56,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:40:56,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:40:56,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:40:56,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:40:56,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:40:56,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:40:56,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:40:56,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:40:56,625 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:40:56,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:40:56,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:40:56,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:40:56,627 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:40:56,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:40:56,628 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:40:56,628 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:40:56,628 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:40:56,629 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:40:56,629 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:40:56,629 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:40:56,630 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:40:56,630 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:40:56,630 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:40:56,630 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:40:56,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:40:56,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:40:56,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:40:56,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:40:56,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:40:56,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:40:56,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:40:56,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:40:56,634 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:40:56,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:40:56,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:40:56,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:40:56,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:40:56,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:40:56,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:40:56,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:40:56,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:40:56,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:40:56,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:40:56,637 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:40:56,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:40:56,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:40:56,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:40:56,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:40:56,638 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_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09575df3d22e9082519fef8b3f639469f79418a93deb54dd64ac9991de61e42a [2021-11-19 13:40:56,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:40:57,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:40:57,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:40:57,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:40:57,012 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:40:57,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2021-11-19 13:40:57,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/data/b52051988/3968379c3d59480aa337d8fbf8a786f6/FLAG50aab7d9c [2021-11-19 13:40:57,743 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:40:57,746 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2021-11-19 13:40:57,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/data/b52051988/3968379c3d59480aa337d8fbf8a786f6/FLAG50aab7d9c [2021-11-19 13:40:58,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/data/b52051988/3968379c3d59480aa337d8fbf8a786f6 [2021-11-19 13:40:58,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:40:58,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:40:58,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:40:58,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:40:58,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:40:58,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473dc00e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58, skipping insertion in model container [2021-11-19 13:40:58,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:40:58,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:40:58,395 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2021-11-19 13:40:58,427 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:40:58,438 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:40:58,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2021-11-19 13:40:58,479 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:40:58,498 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:40:58,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58 WrapperNode [2021-11-19 13:40:58,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:40:58,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:40:58,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:40:58,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:40:58,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,546 INFO L137 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-11-19 13:40:58,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:40:58,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:40:58,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:40:58,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:40:58,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:40:58,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:40:58,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:40:58,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:40:58,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (1/1) ... [2021-11-19 13:40:58,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:40:58,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:40:58,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:40:58,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:40:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:40:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:40:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:40:58,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:40:58,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:40:58,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:40:58,790 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:40:58,792 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:40:58,979 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:40:59,017 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:40:59,017 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 13:40:59,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:40:59 BoogieIcfgContainer [2021-11-19 13:40:59,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:40:59,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:40:59,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:40:59,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:40:59,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:40:58" (1/3) ... [2021-11-19 13:40:59,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d605c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:40:59, skipping insertion in model container [2021-11-19 13:40:59,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:40:58" (2/3) ... [2021-11-19 13:40:59,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d605c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:40:59, skipping insertion in model container [2021-11-19 13:40:59,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:40:59" (3/3) ... [2021-11-19 13:40:59,033 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2021-11-19 13:40:59,039 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:40:59,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:40:59,108 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:40:59,116 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:40:59,116 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:40:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:40:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 13:40:59,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:59,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:40:59,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1881233236, now seen corresponding path program 1 times [2021-11-19 13:40:59,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:40:59,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253987792] [2021-11-19 13:40:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:59,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:40:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:40:59,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:40:59,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253987792] [2021-11-19 13:40:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253987792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:59,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:59,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:40:59,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094351512] [2021-11-19 13:40:59,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:59,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:40:59,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:40:59,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:40:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:40:59,429 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:40:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:59,510 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2021-11-19 13:40:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:40:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-19 13:40:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:59,522 INFO L225 Difference]: With dead ends: 27 [2021-11-19 13:40:59,535 INFO L226 Difference]: Without dead ends: 13 [2021-11-19 13:40:59,539 INFO L932 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 [2021-11-19 13:40:59,543 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:59,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:40:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-19 13:40:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-19 13:40:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 13:40:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-19 13:40:59,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-11-19 13:40:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:59,589 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-19 13:40:59,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:40:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-19 13:40:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 13:40:59,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:59,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:40:59,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:40:59,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash -515868340, now seen corresponding path program 1 times [2021-11-19 13:40:59,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:40:59,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385797989] [2021-11-19 13:40:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:59,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:40:59,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:40:59,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54589462] [2021-11-19 13:40:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:59,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:40:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:40:59,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:40:59,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:40:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:59,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:40:59,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:41:00,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:41:00,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:41:00,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385797989] [2021-11-19 13:41:00,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:41:00,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54589462] [2021-11-19 13:41:00,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54589462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:00,240 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:41:00,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 13:41:00,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144559137] [2021-11-19 13:41:00,242 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:00,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:41:00,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:41:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:41:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:41:00,244 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:41:02,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 13:41:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:02,552 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-19 13:41:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:41:02,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 13:41:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:02,555 INFO L225 Difference]: With dead ends: 31 [2021-11-19 13:41:02,555 INFO L226 Difference]: Without dead ends: 27 [2021-11-19 13:41:02,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:41:02,558 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:02,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:41:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-19 13:41:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-19 13:41:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:41:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-19 13:41:02,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 8 [2021-11-19 13:41:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:02,572 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-19 13:41:02,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:41:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-19 13:41:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 13:41:02,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:02,574 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:41:02,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:02,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-19 13:41:02,775 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 977989570, now seen corresponding path program 1 times [2021-11-19 13:41:02,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:41:02,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866445539] [2021-11-19 13:41:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:02,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:41:02,797 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:41:02,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580786587] [2021-11-19 13:41:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:02,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:41:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:41:02,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:41:02,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 13:41:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:02,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:41:02,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:41:03,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:41:03,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:41:03,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866445539] [2021-11-19 13:41:03,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:41:03,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580786587] [2021-11-19 13:41:03,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580786587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:41:03,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127841177] [2021-11-19 13:41:03,173 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 13:41:03,183 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:41:03,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:41:03,195 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:41:03,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:41:03,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:41:03,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-19 13:41:03,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,568 INFO L180 QuantifierPusher]: treesize reduction 24, result has 64.7 percent of original size [2021-11-19 13:41:03,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-19 13:41:03,602 INFO L180 QuantifierPusher]: treesize reduction 25, result has 74.0 percent of original size [2021-11-19 13:41:03,644 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:41:03,649 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:41:03,667 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:41:03,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:41:03,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-19 13:41:03,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-19 13:41:03,685 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:41:03,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:41:03,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-19 13:41:03,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-19 13:41:03,718 INFO L180 QuantifierPusher]: treesize reduction 24, result has 64.7 percent of original size [2021-11-19 13:41:03,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-19 13:41:03,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:41:03,808 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2021-11-19 13:41:03,817 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:41:04,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:41:04,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:41:04,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-19 13:41:04,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284714051] [2021-11-19 13:41:04,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 13:41:04,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:41:04,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:41:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:41:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:41:04,594 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:41:06,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 13:41:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:06,838 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-19 13:41:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:41:06,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 13:41:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:06,841 INFO L225 Difference]: With dead ends: 37 [2021-11-19 13:41:06,841 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 13:41:06,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:41:06,844 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:06,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 13:41:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 13:41:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-19 13:41:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:41:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-19 13:41:06,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 12 [2021-11-19 13:41:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:06,854 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-19 13:41:06,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:41:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-19 13:41:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 13:41:06,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:06,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:41:06,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:07,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:41:07,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash -969972797, now seen corresponding path program 1 times [2021-11-19 13:41:07,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:41:07,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026336194] [2021-11-19 13:41:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:07,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:41:07,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:41:07,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089035582] [2021-11-19 13:41:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:07,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:41:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:41:07,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:41:07,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 13:41:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:41:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:41:07,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:41:07,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:41:07,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026336194] [2021-11-19 13:41:07,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:41:07,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089035582] [2021-11-19 13:41:07,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089035582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:07,338 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:41:07,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:41:07,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057187003] [2021-11-19 13:41:07,338 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:07,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:41:07,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:41:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:41:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:41:07,341 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:41:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:07,370 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-19 13:41:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:41:07,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-19 13:41:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:07,373 INFO L225 Difference]: With dead ends: 35 [2021-11-19 13:41:07,373 INFO L226 Difference]: Without dead ends: 22 [2021-11-19 13:41:07,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:41:07,375 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:07,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:41:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-19 13:41:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-19 13:41:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:41:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-19 13:41:07,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2021-11-19 13:41:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:07,384 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-19 13:41:07,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:41:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-19 13:41:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 13:41:07,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:07,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:41:07,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:07,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:41:07,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash -425494840, now seen corresponding path program 1 times [2021-11-19 13:41:07,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:41:07,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82057715] [2021-11-19 13:41:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:07,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:41:07,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 13:41:07,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417814823] [2021-11-19 13:41:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:07,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:41:07,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:41:07,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:41:07,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081e1caa-3cc5-4766-bd99-6d941017300d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process