./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:31:26,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:31:26,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:31:26,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:31:26,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:31:26,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:31:26,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:31:26,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:31:26,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:31:26,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:31:26,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:31:26,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:31:26,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:31:26,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:31:26,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:31:26,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:31:26,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:31:26,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:31:26,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:31:26,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:31:26,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:31:26,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:31:26,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:31:26,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:31:26,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:31:26,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:31:26,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:31:26,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:31:26,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:31:26,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:31:26,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:31:26,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:31:26,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:31:26,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:31:26,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:31:26,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:31:26,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:31:26,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:31:26,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:31:26,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:31:26,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:31:26,348 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:31:26,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:31:26,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:31:26,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:31:26,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:31:26,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:31:26,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:31:26,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:31:26,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:31:26,375 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:31:26,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:31:26,376 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:31:26,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:31:26,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:31:26,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:31:26,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:31:26,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:31:26,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:31:26,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:31:26,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:31:26,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:31:26,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:31:26,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:31:26,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:31:26,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:31:26,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:31:26,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:31:26,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:31:26,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:31:26,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:31:26,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:31:26,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:31:26,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:31:26,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:31:26,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:31:26,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2021-12-06 22:31:26,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:31:26,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:31:26,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:31:26,596 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:31:26,597 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:31:26,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2021-12-06 22:31:26,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/fa76a36f7/f917bc9addf9480c86dfadc350c112c3/FLAGdc8093b1b [2021-12-06 22:31:26,998 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:31:26,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2021-12-06 22:31:27,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/fa76a36f7/f917bc9addf9480c86dfadc350c112c3/FLAGdc8093b1b [2021-12-06 22:31:27,018 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/fa76a36f7/f917bc9addf9480c86dfadc350c112c3 [2021-12-06 22:31:27,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:31:27,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:31:27,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:31:27,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:31:27,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:31:27,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d76f59d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27, skipping insertion in model container [2021-12-06 22:31:27,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:31:27,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:31:27,167 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2021-12-06 22:31:27,193 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2021-12-06 22:31:27,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:31:27,202 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:31:27,212 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2021-12-06 22:31:27,224 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2021-12-06 22:31:27,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:31:27,240 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:31:27,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27 WrapperNode [2021-12-06 22:31:27,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:31:27,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:31:27,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:31:27,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:31:27,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,275 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2021-12-06 22:31:27,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:31:27,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:31:27,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:31:27,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:31:27,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:31:27,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:31:27,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:31:27,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:31:27,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (1/1) ... [2021-12-06 22:31:27,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:31:27,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:27,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:31:27,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:31:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:31:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-06 22:31:27,359 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-06 22:31:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-06 22:31:27,359 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-06 22:31:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:31:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:31:27,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:31:27,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 22:31:27,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 22:31:27,410 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:31:27,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:31:27,553 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:31:27,560 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:31:27,560 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 22:31:27,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:31:27 BoogieIcfgContainer [2021-12-06 22:31:27,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:31:27,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:31:27,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:31:27,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:31:27,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:31:27" (1/3) ... [2021-12-06 22:31:27,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d60e406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:31:27, skipping insertion in model container [2021-12-06 22:31:27,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:27" (2/3) ... [2021-12-06 22:31:27,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d60e406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:31:27, skipping insertion in model container [2021-12-06 22:31:27,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:31:27" (3/3) ... [2021-12-06 22:31:27,571 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2021-12-06 22:31:27,576 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:31:27,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 22:31:27,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:31:27,629 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=PETRI_NET, 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 [2021-12-06 22:31:27,629 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 22:31:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 22:31:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:31:27,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:27,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:27,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-06 22:31:27,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:27,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316482160] [2021-12-06 22:31:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:27,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:27,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:27,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316482160] [2021-12-06 22:31:27,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316482160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:31:27,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:31:27,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:31:27,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841751616] [2021-12-06 22:31:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:31:27,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:31:27,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:31:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:27,836 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-06 22:31:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:27,871 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2021-12-06 22:31:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:31:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2021-12-06 22:31:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:27,879 INFO L225 Difference]: With dead ends: 97 [2021-12-06 22:31:27,879 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 22:31:27,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:27,884 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:27,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 22:31:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-12-06 22:31:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-12-06 22:31:27,915 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2021-12-06 22:31:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:27,915 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-12-06 22:31:27,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-06 22:31:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-12-06 22:31:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:31:27,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:27,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:27,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:31:27,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:27,918 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2021-12-06 22:31:27,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:27,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185737087] [2021-12-06 22:31:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:27,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:27,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:27,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185737087] [2021-12-06 22:31:27,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185737087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:31:27,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:31:27,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:31:27,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843015121] [2021-12-06 22:31:27,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:31:27,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:31:27,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:31:27,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:27,956 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-06 22:31:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:27,977 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2021-12-06 22:31:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:31:27,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2021-12-06 22:31:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:27,980 INFO L225 Difference]: With dead ends: 67 [2021-12-06 22:31:27,980 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 22:31:27,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:27,983 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 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 [2021-12-06 22:31:27,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 22:31:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-12-06 22:31:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-06 22:31:27,993 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2021-12-06 22:31:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:27,993 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-06 22:31:27,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-06 22:31:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-06 22:31:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 22:31:27,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:27,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:27,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:31:27,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-06 22:31:27,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:27,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565579176] [2021-12-06 22:31:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:27,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:28,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:31:28,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553089584] [2021-12-06 22:31:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:28,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:28,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:28,011 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:28,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:31:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:31:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:28,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:28,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:28,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565579176] [2021-12-06 22:31:28,177 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:31:28,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553089584] [2021-12-06 22:31:28,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553089584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:28,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:28,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 22:31:28,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896625755] [2021-12-06 22:31:28,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:28,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:31:28,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:31:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:31:28,179 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-12-06 22:31:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:28,212 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-12-06 22:31:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:31:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 15 [2021-12-06 22:31:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:28,213 INFO L225 Difference]: With dead ends: 58 [2021-12-06 22:31:28,213 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 22:31:28,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:31:28,214 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 22:31:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-06 22:31:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-06 22:31:28,220 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2021-12-06 22:31:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:28,221 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-06 22:31:28,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-12-06 22:31:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-06 22:31:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 22:31:28,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:28,222 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:28,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:31:28,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:28,423 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1992824063, now seen corresponding path program 1 times [2021-12-06 22:31:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:28,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257982056] [2021-12-06 22:31:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:28,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:28,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:31:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257039173] [2021-12-06 22:31:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:28,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:28,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:28,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:31:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:28,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:31:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:28,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:28,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257982056] [2021-12-06 22:31:28,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:31:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257039173] [2021-12-06 22:31:28,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257039173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:28,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:28,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 22:31:28,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799633844] [2021-12-06 22:31:28,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:28,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:31:28,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:31:28,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:31:28,722 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-12-06 22:31:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:28,772 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2021-12-06 22:31:28,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:31:28,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 19 [2021-12-06 22:31:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:28,773 INFO L225 Difference]: With dead ends: 60 [2021-12-06 22:31:28,773 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 22:31:28,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:31:28,774 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:28,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 265 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 22:31:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-06 22:31:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-06 22:31:28,781 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2021-12-06 22:31:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:28,781 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-06 22:31:28,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-12-06 22:31:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-06 22:31:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 22:31:28,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:28,782 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:28,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:31:28,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:28,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:28,986 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-06 22:31:28,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:28,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376098177] [2021-12-06 22:31:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:28,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:29,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:31:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130502330] [2021-12-06 22:31:29,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:31:29,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:29,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:29,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:31:29,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:31:29,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:31:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:31:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:29,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:29,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:29,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376098177] [2021-12-06 22:31:29,322 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:31:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130502330] [2021-12-06 22:31:29,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130502330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:29,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:29,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 22:31:29,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644538159] [2021-12-06 22:31:29,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:29,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:31:29,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:31:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:31:29,323 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2021-12-06 22:31:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:29,385 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-12-06 22:31:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:31:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 21 [2021-12-06 22:31:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:29,386 INFO L225 Difference]: With dead ends: 68 [2021-12-06 22:31:29,387 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 22:31:29,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:31:29,388 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:29,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 301 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 22:31:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 22:31:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-06 22:31:29,393 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2021-12-06 22:31:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:29,394 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-06 22:31:29,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2021-12-06 22:31:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-06 22:31:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:31:29,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:29,395 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:29,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:31:29,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:29,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2021-12-06 22:31:29,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:29,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935027100] [2021-12-06 22:31:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:29,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:29,633 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:31:29,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70465098] [2021-12-06 22:31:29,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:31:29,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:29,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:29,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:31:29,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:31:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:31:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 22:31:29,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:31:29,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:31:30,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935027100] [2021-12-06 22:31:30,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:31:30,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70465098] [2021-12-06 22:31:30,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70465098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:30,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:30,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-06 22:31:30,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591927216] [2021-12-06 22:31:30,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:30,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 22:31:30,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 22:31:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:31:30,175 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 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) [2021-12-06 22:31:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:30,578 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2021-12-06 22:31:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:31:30,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 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 23 [2021-12-06 22:31:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:30,580 INFO L225 Difference]: With dead ends: 81 [2021-12-06 22:31:30,580 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 22:31:30,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:31:30,581 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:30,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 524 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:31:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 22:31:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2021-12-06 22:31:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 22:31:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-12-06 22:31:30,588 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2021-12-06 22:31:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:30,589 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-12-06 22:31:30,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 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) [2021-12-06 22:31:30,589 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-12-06 22:31:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 22:31:30,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:30,590 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:30,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:31:30,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 22:31:30,792 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2021-12-06 22:31:30,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:30,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635492602] [2021-12-06 22:31:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:30,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:30,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:31:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192070102] [2021-12-06 22:31:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:31:30,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:30,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:30,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:31:30,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:31:30,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:31:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 22:31:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:30,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:31,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635492602] [2021-12-06 22:31:31,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:31:31,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192070102] [2021-12-06 22:31:31,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192070102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:31,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:31,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-06 22:31:31,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666057324] [2021-12-06 22:31:31,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:31,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:31:31,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:31:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:31:31,086 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2021-12-06 22:31:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:31,228 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2021-12-06 22:31:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:31:31,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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 25 [2021-12-06 22:31:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:31,231 INFO L225 Difference]: With dead ends: 94 [2021-12-06 22:31:31,231 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 22:31:31,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:31:31,233 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:31,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 375 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:31:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 22:31:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-06 22:31:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 22:31:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-12-06 22:31:31,242 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2021-12-06 22:31:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:31,242 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-12-06 22:31:31,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2021-12-06 22:31:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-12-06 22:31:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:31:31,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:31,244 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:31,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:31:31,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:31,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2021-12-06 22:31:31,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457508456] [2021-12-06 22:31:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:31,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:31,484 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:31:31,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137399786] [2021-12-06 22:31:31,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:31:31,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:31,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:31,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:31,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:31:31,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 22:31:31,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:31:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:31:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:31,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:33,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:33,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457508456] [2021-12-06 22:31:33,844 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:31:33,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137399786] [2021-12-06 22:31:33,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137399786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:33,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:33,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 22:31:33,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728469652] [2021-12-06 22:31:33,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:33,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 22:31:33,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 22:31:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:31:33,847 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-12-06 22:31:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:33,903 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-12-06 22:31:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:31:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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 27 [2021-12-06 22:31:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:33,904 INFO L225 Difference]: With dead ends: 76 [2021-12-06 22:31:33,904 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 22:31:33,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:31:33,905 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:33,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 354 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-06 22:31:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 22:31:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-06 22:31:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 22:31:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-06 22:31:33,910 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2021-12-06 22:31:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:33,910 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-06 22:31:33,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-12-06 22:31:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-06 22:31:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 22:31:33,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:33,911 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:33,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:31:34,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 22:31:34,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2021-12-06 22:31:34,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:34,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998773840] [2021-12-06 22:31:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:34,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:34,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:31:34,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834411930] [2021-12-06 22:31:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:34,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:34,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:34,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:31:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 22:31:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:31:34,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:31:34,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:34,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998773840] [2021-12-06 22:31:34,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:31:34,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834411930] [2021-12-06 22:31:34,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834411930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:34,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:34,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-06 22:31:34,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410122877] [2021-12-06 22:31:34,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:34,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:31:34,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:31:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:31:34,779 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:31:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:35,427 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-06 22:31:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:31:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-06 22:31:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:35,428 INFO L225 Difference]: With dead ends: 49 [2021-12-06 22:31:35,428 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 22:31:35,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:31:35,429 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:35,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 379 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:31:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 22:31:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 22:31:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 22:31:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-06 22:31:35,431 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2021-12-06 22:31:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:35,431 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-06 22:31:35,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:31:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-06 22:31:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:31:35,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:35,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:35,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 22:31:35,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:35,634 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2021-12-06 22:31:35,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:35,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684159707] [2021-12-06 22:31:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:35,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 22:31:35,672 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 22:31:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 22:31:35,698 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 22:31:35,698 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 22:31:35,698 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-06 22:31:35,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-06 22:31:35,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:31:35,702 INFO L732 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2021-12-06 22:31:35,704 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 22:31:35,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 10:31:35 BoogieIcfgContainer [2021-12-06 22:31:35,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 22:31:35,723 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 22:31:35,723 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 22:31:35,723 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 22:31:35,724 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:31:27" (3/4) ... [2021-12-06 22:31:35,726 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 22:31:35,726 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 22:31:35,726 INFO L158 Benchmark]: Toolchain (without parser) took 8705.19ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 102.4MB in the beginning and 50.0MB in the end (delta: 52.4MB). Peak memory consumption was 77.5MB. Max. memory is 16.1GB. [2021-12-06 22:31:35,726 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 75.5MB. Free memory was 47.3MB in the beginning and 47.3MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:31:35,727 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.94ms. Allocated memory is still 123.7MB. Free memory was 102.1MB in the beginning and 90.9MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 22:31:35,727 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.70ms. Allocated memory is still 123.7MB. Free memory was 90.9MB in the beginning and 89.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:31:35,727 INFO L158 Benchmark]: Boogie Preprocessor took 23.35ms. Allocated memory is still 123.7MB. Free memory was 89.0MB in the beginning and 87.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:31:35,727 INFO L158 Benchmark]: RCFGBuilder took 262.33ms. Allocated memory is still 123.7MB. Free memory was 87.8MB in the beginning and 77.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 22:31:35,728 INFO L158 Benchmark]: TraceAbstraction took 8159.19ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 76.5MB in the beginning and 50.0MB in the end (delta: 26.5MB). Peak memory consumption was 54.4MB. Max. memory is 16.1GB. [2021-12-06 22:31:35,728 INFO L158 Benchmark]: Witness Printer took 2.57ms. Allocated memory is still 148.9MB. Free memory is still 50.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:31:35,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 75.5MB. Free memory was 47.3MB in the beginning and 47.3MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.94ms. Allocated memory is still 123.7MB. Free memory was 102.1MB in the beginning and 90.9MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.70ms. Allocated memory is still 123.7MB. Free memory was 90.9MB in the beginning and 89.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.35ms. Allocated memory is still 123.7MB. Free memory was 89.0MB in the beginning and 87.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 262.33ms. Allocated memory is still 123.7MB. Free memory was 87.8MB in the beginning and 77.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8159.19ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 76.5MB in the beginning and 50.0MB in the end (delta: 26.5MB). Peak memory consumption was 54.4MB. Max. memory is 16.1GB. * Witness Printer took 2.57ms. Allocated memory is still 148.9MB. Free memory is still 50.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=57] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=57, x=57] [L100] RET, EXPR f(IN) VAL [f(IN)=49, IN=57] [L100] CALL, EXPR fp(IN) VAL [\old(x)=57] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=57, x=57] [L100] RET, EXPR fp(IN) VAL [f(IN)=49, fp(IN)=50, IN=57] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=52] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR f(x) VAL [f(x)=51, IN=57, x=52] [L102] CALL, EXPR fp(x) VAL [\old(x)=52] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR fp(x) VAL [f(x)=51, fp(x)=53, IN=57, x=52] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=55] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=55, x=55] [L104] RET, EXPR f(x) VAL [f(x)=54, IN=57, x=55] [L104] CALL, EXPR fp(x) VAL [\old(x)=55] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=55, x=55] [L104] RET, EXPR fp(x) VAL [f(x)=54, fp(x)=56, IN=57, x=55] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=57] [L109] reach_error() VAL [IN=57] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 2571 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 2202 mSDsCounter, 103 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 840 IncrementalHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 103 mSolverCounterUnsat, 369 mSDtfsCounter, 840 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 214 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 322 ConstructedInterpolants, 10 QuantifiedInterpolants, 2071 SizeOfPredicates, 45 NumberOfNonLiveVariables, 545 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 56/326 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 [2021-12-06 22:31:35,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:31:37,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:31:37,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:31:37,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:31:37,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:31:37,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:31:37,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:31:37,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:31:37,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:31:37,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:31:37,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:31:37,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:31:37,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:31:37,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:31:37,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:31:37,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:31:37,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:31:37,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:31:37,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:31:37,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:31:37,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:31:37,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:31:37,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:31:37,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:31:37,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:31:37,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:31:37,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:31:37,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:31:37,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:31:37,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:31:37,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:31:37,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:31:37,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:31:37,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:31:37,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:31:37,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:31:37,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:31:37,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:31:37,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:31:37,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:31:37,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:31:37,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 22:31:37,407 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:31:37,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:31:37,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:31:37,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:31:37,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:31:37,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:31:37,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:31:37,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:31:37,410 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:31:37,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:31:37,411 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:31:37,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:31:37,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:31:37,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:31:37,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:31:37,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:31:37,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 22:31:37,412 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 22:31:37,412 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 22:31:37,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:31:37,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:31:37,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:31:37,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:31:37,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:31:37,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:31:37,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:31:37,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:31:37,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:31:37,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:31:37,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:31:37,415 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 22:31:37,415 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 22:31:37,415 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:31:37,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:31:37,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:31:37,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:31:37,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 22:31:37,416 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_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2021-12-06 22:31:37,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:31:37,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:31:37,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:31:37,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:31:37,696 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:31:37,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2021-12-06 22:31:37,738 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/f0ec468e4/68c395ae09ca43e7a4de9a0f51383899/FLAGaf22db08d [2021-12-06 22:31:38,040 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:31:38,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2021-12-06 22:31:38,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/f0ec468e4/68c395ae09ca43e7a4de9a0f51383899/FLAGaf22db08d [2021-12-06 22:31:38,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/data/f0ec468e4/68c395ae09ca43e7a4de9a0f51383899 [2021-12-06 22:31:38,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:31:38,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:31:38,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:31:38,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:31:38,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:31:38,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d5559d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38, skipping insertion in model container [2021-12-06 22:31:38,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:31:38,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:31:38,594 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2021-12-06 22:31:38,613 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2021-12-06 22:31:38,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:31:38,628 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:31:38,647 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2021-12-06 22:31:38,659 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_8e792953-e78c-4007-bea1-f130bc463dc2/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2021-12-06 22:31:38,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:31:38,675 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:31:38,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38 WrapperNode [2021-12-06 22:31:38,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:31:38,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:31:38,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:31:38,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:31:38,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,705 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2021-12-06 22:31:38,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:31:38,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:31:38,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:31:38,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:31:38,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:31:38,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:31:38,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:31:38,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:31:38,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (1/1) ... [2021-12-06 22:31:38,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:31:38,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:38,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:31:38,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:31:38,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:31:38,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 22:31:38,780 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-06 22:31:38,780 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-06 22:31:38,780 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-06 22:31:38,780 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-06 22:31:38,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:31:38,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:31:38,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 22:31:38,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 22:31:38,832 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:31:38,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:31:46,361 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:31:46,372 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:31:46,372 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 22:31:46,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:31:46 BoogieIcfgContainer [2021-12-06 22:31:46,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:31:46,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:31:46,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:31:46,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:31:46,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:31:38" (1/3) ... [2021-12-06 22:31:46,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483edcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:31:46, skipping insertion in model container [2021-12-06 22:31:46,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:31:38" (2/3) ... [2021-12-06 22:31:46,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483edcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:31:46, skipping insertion in model container [2021-12-06 22:31:46,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:31:46" (3/3) ... [2021-12-06 22:31:46,381 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2021-12-06 22:31:46,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:31:46,386 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 22:31:46,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:31:46,427 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=PETRI_NET, 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 [2021-12-06 22:31:46,427 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 22:31:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 22:31:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:31:46,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:46,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:46,443 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-06 22:31:46,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:31:46,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557993531] [2021-12-06 22:31:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:46,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:31:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:31:46,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:31:46,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 22:31:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:31:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:46,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:31:46,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:31:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557993531] [2021-12-06 22:31:46,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557993531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:31:46,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:31:46,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:31:46,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389171694] [2021-12-06 22:31:46,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:31:46,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:31:46,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:31:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:31:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:46,672 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-06 22:31:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:46,745 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-12-06 22:31:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:31:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2021-12-06 22:31:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:46,754 INFO L225 Difference]: With dead ends: 99 [2021-12-06 22:31:46,754 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 22:31:46,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:46,761 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 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 [2021-12-06 22:31:46,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 22:31:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-06 22:31:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-06 22:31:46,792 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2021-12-06 22:31:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:46,793 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-06 22:31:46,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-06 22:31:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-06 22:31:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:31:46,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:46,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:46,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:31:46,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:31:46,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2021-12-06 22:31:47,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:31:47,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386579519] [2021-12-06 22:31:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:47,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:31:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:31:47,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:31:47,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 22:31:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:31:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:47,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:31:47,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:31:47,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386579519] [2021-12-06 22:31:47,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386579519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:31:47,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:31:47,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:31:47,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574163184] [2021-12-06 22:31:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:31:47,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:31:47,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:31:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:31:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:47,217 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-06 22:31:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:47,268 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-06 22:31:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:31:47,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2021-12-06 22:31:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:47,270 INFO L225 Difference]: With dead ends: 55 [2021-12-06 22:31:47,270 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 22:31:47,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:47,272 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 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 [2021-12-06 22:31:47,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 22:31:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-06 22:31:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-06 22:31:47,280 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2021-12-06 22:31:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:47,281 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-06 22:31:47,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-06 22:31:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-06 22:31:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 22:31:47,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:47,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:47,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 22:31:47,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:31:47,484 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-06 22:31:47,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:31:47,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585879612] [2021-12-06 22:31:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:47,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:31:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:31:47,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:31:47,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 22:31:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 22:31:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:47,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:31:47,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:31:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585879612] [2021-12-06 22:31:47,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585879612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:31:47,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:31:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:31:47,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751566062] [2021-12-06 22:31:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:31:47,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:31:47,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:31:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:31:47,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:47,777 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-12-06 22:31:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:47,836 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-06 22:31:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:31:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2021-12-06 22:31:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:47,838 INFO L225 Difference]: With dead ends: 56 [2021-12-06 22:31:47,838 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 22:31:47,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:31:47,840 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:47,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:31:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 22:31:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-06 22:31:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-06 22:31:47,851 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2021-12-06 22:31:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:47,851 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-06 22:31:47,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-12-06 22:31:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-06 22:31:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 22:31:47,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:47,853 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:47,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 22:31:48,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:31:48,055 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2021-12-06 22:31:48,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:31:48,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591498089] [2021-12-06 22:31:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:48,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:31:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:31:48,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:31:48,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 22:31:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:31:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:48,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:31:48,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:31:48,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591498089] [2021-12-06 22:31:48,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591498089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:48,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 22:31:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536140275] [2021-12-06 22:31:48,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:31:48,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:31:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:31:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:31:48,714 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-12-06 22:31:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:31:48,872 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-12-06 22:31:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:31:48,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 17 [2021-12-06 22:31:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:31:48,874 INFO L225 Difference]: With dead ends: 60 [2021-12-06 22:31:48,874 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 22:31:48,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:31:48,876 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:31:48,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:31:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 22:31:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-06 22:31:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 22:31:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-06 22:31:48,887 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2021-12-06 22:31:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:48,887 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-06 22:31:48,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-12-06 22:31:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-06 22:31:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 22:31:48,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:48,888 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:31:48,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 22:31:49,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:31:49,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-06 22:31:49,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:31:49,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120721638] [2021-12-06 22:31:49,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:31:49,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:31:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:31:49,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:31:49,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 22:31:49,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:31:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:31:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:31:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:31:50,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:31:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:31:57,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:31:57,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120721638] [2021-12-06 22:31:57,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120721638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:31:57,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:31:57,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 22:31:57,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697782378] [2021-12-06 22:31:57,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:31:57,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 22:31:57,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:31:57,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 22:31:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:31:57,681 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:32:20,225 WARN L227 SmtUtils]: Spent 7.96s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:32:36,594 WARN L227 SmtUtils]: Spent 9.90s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:32:52,329 WARN L227 SmtUtils]: Spent 9.25s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:32:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:32:55,609 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2021-12-06 22:32:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:32:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 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 21 [2021-12-06 22:32:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:32:55,639 INFO L225 Difference]: With dead ends: 71 [2021-12-06 22:32:55,639 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 22:32:55,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:32:55,641 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:32:55,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 438 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 22:32:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 22:32:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-12-06 22:32:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 22:32:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-12-06 22:32:55,651 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2021-12-06 22:32:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:32:55,651 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-12-06 22:32:55,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:32:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-12-06 22:32:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:32:55,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:32:55,653 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:32:55,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 22:32:55,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:32:55,854 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:32:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:32:55,856 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2021-12-06 22:32:55,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:32:55,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63818422] [2021-12-06 22:32:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:32:55,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:32:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:32:55,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:32:55,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 22:32:55,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:32:55,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:32:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:32:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:32:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:32:56,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:32:56,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:32:56,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63818422] [2021-12-06 22:32:56,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63818422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:32:56,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:32:56,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:32:56,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278268876] [2021-12-06 22:32:56,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:32:56,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:32:56,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:32:56,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:32:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:32:56,050 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-06 22:32:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:32:56,093 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-12-06 22:32:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:32:56,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 23 [2021-12-06 22:32:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:32:56,096 INFO L225 Difference]: With dead ends: 78 [2021-12-06 22:32:56,096 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 22:32:56,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:32:56,097 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:32:56,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:32:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 22:32:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-12-06 22:32:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 22:32:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-12-06 22:32:56,106 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2021-12-06 22:32:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:32:56,106 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-12-06 22:32:56,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-06 22:32:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-12-06 22:32:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 22:32:56,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:32:56,108 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:32:56,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 22:32:56,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:32:56,310 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:32:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:32:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2021-12-06 22:32:56,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:32:56,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24551449] [2021-12-06 22:32:56,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:32:56,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:32:56,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:32:56,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:32:56,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 22:32:56,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:32:56,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:32:56,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:32:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:32:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:32:57,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:32:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:32:57,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:32:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24551449] [2021-12-06 22:32:57,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24551449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:32:57,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:32:57,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 22:32:57,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116563369] [2021-12-06 22:32:57,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:32:57,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:32:57,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:32:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:32:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:32:57,793 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-12-06 22:32:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:32:58,612 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2021-12-06 22:32:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:32:58,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 25 [2021-12-06 22:32:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:32:58,621 INFO L225 Difference]: With dead ends: 88 [2021-12-06 22:32:58,621 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 22:32:58,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:32:58,622 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:32:58,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:32:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 22:32:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-12-06 22:32:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 22:32:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-12-06 22:32:58,629 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2021-12-06 22:32:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:32:58,630 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-12-06 22:32:58,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-12-06 22:32:58,630 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-12-06 22:32:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 22:32:58,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:32:58,631 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:32:58,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 22:32:58,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:32:58,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:32:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:32:58,834 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2021-12-06 22:32:58,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:32:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901543774] [2021-12-06 22:32:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:32:58,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:32:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:32:58,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:32:58,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 22:32:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:32:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:32:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:32:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:32:59,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:33:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:00,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:33:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901543774] [2021-12-06 22:33:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901543774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:33:00,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:33:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 22:33:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626624332] [2021-12-06 22:33:00,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:33:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:33:00,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:33:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:33:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:33:00,136 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:33:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:33:01,488 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2021-12-06 22:33:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:33:01,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-06 22:33:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:33:01,496 INFO L225 Difference]: With dead ends: 91 [2021-12-06 22:33:01,496 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 22:33:01,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:33:01,497 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:33:01,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 264 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:33:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 22:33:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-12-06 22:33:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 22:33:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-06 22:33:01,506 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 26 [2021-12-06 22:33:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:33:01,506 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-06 22:33:01,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:33:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-06 22:33:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:33:01,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:33:01,508 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:01,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-06 22:33:01,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:33:01,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:33:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2021-12-06 22:33:01,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:33:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204271442] [2021-12-06 22:33:01,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:33:01,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:33:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:33:01,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:33:01,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 22:33:01,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 22:33:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:33:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 22:33:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:33:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:33:02,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:33:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:33:05,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:33:05,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204271442] [2021-12-06 22:33:05,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204271442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:33:05,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:33:05,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-12-06 22:33:05,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988948002] [2021-12-06 22:33:05,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:33:05,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:33:05,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:33:05,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:33:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:33:05,052 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-12-06 22:33:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:33:05,662 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-12-06 22:33:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:33:05,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 27 [2021-12-06 22:33:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:33:05,669 INFO L225 Difference]: With dead ends: 81 [2021-12-06 22:33:05,669 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 22:33:05,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:33:05,670 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:33:05,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 206 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:33:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 22:33:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-06 22:33:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 22:33:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-06 22:33:05,677 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2021-12-06 22:33:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:33:05,677 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-06 22:33:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-12-06 22:33:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-06 22:33:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 22:33:05,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:33:05,678 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:05,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-06 22:33:05,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:33:05,880 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:33:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2021-12-06 22:33:05,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:33:05,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782474617] [2021-12-06 22:33:05,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:33:05,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:33:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:33:05,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:33:05,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 22:33:06,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:33:06,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:33:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:33:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:33:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:33:07,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:33:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:33:16,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 22:33:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782474617] [2021-12-06 22:33:16,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782474617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:33:16,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:33:16,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 22:33:16,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476827932] [2021-12-06 22:33:16,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:33:16,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 22:33:16,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 22:33:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 22:33:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:33:16,016 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:33:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:33:28,118 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-06 22:33:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:33:28,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-06 22:33:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:33:28,119 INFO L225 Difference]: With dead ends: 49 [2021-12-06 22:33:28,119 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 22:33:28,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:33:28,121 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:33:28,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 411 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 22:33:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 22:33:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 22:33:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 22:33:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-06 22:33:28,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2021-12-06 22:33:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:33:28,125 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-06 22:33:28,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:33:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-06 22:33:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:33:28,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:33:28,127 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:28,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 22:33:28,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 22:33:28,329 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:33:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2021-12-06 22:33:28,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 22:33:28,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869399327] [2021-12-06 22:33:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:28,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 22:33:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 22:33:28,335 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 22:33:28,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e792953-e78c-4007-bea1-f130bc463dc2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 22:37:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 22:37:24,127 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.