./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0 --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 d629f4eefc4b49512b7b1b628f28a13dcdca90b36cb521919e0cc9ad875c2764 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:31:47,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:31:47,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:31:47,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:31:47,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:31:47,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:31:47,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:31:47,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:31:47,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:31:47,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:31:47,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:31:47,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:31:47,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:31:47,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:31:47,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:31:47,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:31:47,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:31:47,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:31:47,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:31:47,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:31:47,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:31:47,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:31:47,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:31:47,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:31:47,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:31:47,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:31:47,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:31:47,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:31:47,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:31:47,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:31:47,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:31:47,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:31:47,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:31:47,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:31:47,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:31:47,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:31:47,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:31:47,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:31:47,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:31:47,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:31:47,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:31:47,370 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:31:47,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:31:47,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:31:47,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:31:47,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:31:47,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:31:47,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:31:47,420 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:31:47,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:31:47,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:31:47,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:31:47,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:31:47,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:31:47,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:31:47,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:31:47,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:31:47,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:31:47,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:31:47,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:31:47,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:31:47,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:31:47,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:31:47,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:31:47,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:31:47,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:31:47,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:31:47,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:31:47,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:31:47,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:31:47,427 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:31:47,429 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:31:47,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:31:47,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:31:47,430 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_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d629f4eefc4b49512b7b1b628f28a13dcdca90b36cb521919e0cc9ad875c2764 [2021-11-22 15:31:47,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:31:47,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:31:47,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:31:47,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:31:47,781 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:31:47,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c [2021-11-22 15:31:47,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/data/d4422c4ef/239e31f8a265447e9eafda1ebdbc45a3/FLAGa1fae7737 [2021-11-22 15:31:48,526 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:31:48,526 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c [2021-11-22 15:31:48,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/data/d4422c4ef/239e31f8a265447e9eafda1ebdbc45a3/FLAGa1fae7737 [2021-11-22 15:31:48,857 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/data/d4422c4ef/239e31f8a265447e9eafda1ebdbc45a3 [2021-11-22 15:31:48,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:31:48,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:31:48,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:31:48,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:31:48,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:31:48,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:31:48" (1/1) ... [2021-11-22 15:31:48,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37513541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:48, skipping insertion in model container [2021-11-22 15:31:48,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:31:48" (1/1) ... [2021-11-22 15:31:48,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:31:48,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:31:49,175 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_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c[458,471] [2021-11-22 15:31:49,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:31:49,220 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:31:49,238 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_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound5.c[458,471] [2021-11-22 15:31:49,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:31:49,288 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:31:49,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49 WrapperNode [2021-11-22 15:31:49,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:31:49,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:31:49,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:31:49,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:31:49,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,343 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 54 [2021-11-22 15:31:49,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:31:49,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:31:49,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:31:49,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:31:49,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:31:49,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:31:49,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:31:49,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:31:49,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (1/1) ... [2021-11-22 15:31:49,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:31:49,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:49,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:31:49,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:31:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:31:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:31:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:31:49,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:31:49,597 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:31:49,600 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:31:49,811 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:31:49,819 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:31:49,831 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:31:49,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:31:49 BoogieIcfgContainer [2021-11-22 15:31:49,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:31:49,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:31:49,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:31:49,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:31:49,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:31:48" (1/3) ... [2021-11-22 15:31:49,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99cf060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:31:49, skipping insertion in model container [2021-11-22 15:31:49,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:31:49" (2/3) ... [2021-11-22 15:31:49,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99cf060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:31:49, skipping insertion in model container [2021-11-22 15:31:49,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:31:49" (3/3) ... [2021-11-22 15:31:49,854 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound5.c [2021-11-22 15:31:49,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:31:49,872 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-22 15:31:49,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:31:50,001 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 [2021-11-22 15:31:50,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-22 15:31:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 15:31:50,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:31:50,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 15:31:50,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:31:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:31:50,062 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-22 15:31:50,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:31:50,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817888849] [2021-11-22 15:31:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:50,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:31:50,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:31:50,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912589045] [2021-11-22 15:31:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:50,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:50,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:50,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:31:50,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:31:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:31:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:31:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:31:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:50,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:31:50,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:31:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817888849] [2021-11-22 15:31:50,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:31:50,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912589045] [2021-11-22 15:31:50,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912589045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:31:50,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:31:50,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:31:50,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753525026] [2021-11-22 15:31:50,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:31:50,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:31:50,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:31:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:31:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:31:50,640 INFO L87 Difference]: Start difference. First operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:31:51,588 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-11-22 15:31:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:31:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-22 15:31:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:31:51,602 INFO L225 Difference]: With dead ends: 57 [2021-11-22 15:31:51,602 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 15:31:51,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:31:51,611 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:31:51,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 15:31:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 15:31:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-22 15:31:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-22 15:31:51,656 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 6 [2021-11-22 15:31:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:31:51,657 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-22 15:31:51,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-22 15:31:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:31:51,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:31:51,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:31:51,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:31:51,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:51,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:31:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:31:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash 662417944, now seen corresponding path program 1 times [2021-11-22 15:31:51,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:31:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599793543] [2021-11-22 15:31:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:51,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:31:51,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:31:51,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444925596] [2021-11-22 15:31:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:51,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:51,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:31:51,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:31:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:31:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:31:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:31:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:52,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:31:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:31:52,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:31:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599793543] [2021-11-22 15:31:52,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:31:52,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444925596] [2021-11-22 15:31:52,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444925596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:31:52,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:31:52,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-22 15:31:52,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740122332] [2021-11-22 15:31:52,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:31:52,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:31:52,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:31:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:31:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:31:52,385 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:31:52,525 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-22 15:31:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:31:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 15:31:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:31:52,527 INFO L225 Difference]: With dead ends: 33 [2021-11-22 15:31:52,527 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 15:31:52,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:31:52,530 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:31:52,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:31:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 15:31:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-22 15:31:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-22 15:31:52,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-11-22 15:31:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:31:52,538 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-22 15:31:52,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-22 15:31:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 15:31:52,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:31:52,540 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:31:52,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:31:52,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:52,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:31:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:31:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash -939922866, now seen corresponding path program 1 times [2021-11-22 15:31:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:31:52,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870600449] [2021-11-22 15:31:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:52,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:31:52,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:31:52,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750921216] [2021-11-22 15:31:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:52,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:52,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:52,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:31:52,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:31:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:31:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:31:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:31:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:52,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:31:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:53,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:31:53,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870600449] [2021-11-22 15:31:53,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:31:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750921216] [2021-11-22 15:31:53,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750921216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:31:53,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:31:53,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-22 15:31:53,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871458384] [2021-11-22 15:31:53,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:31:53,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:31:53,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:31:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:31:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:31:53,054 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:31:53,161 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-11-22 15:31:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:31:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 15:31:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:31:53,163 INFO L225 Difference]: With dead ends: 40 [2021-11-22 15:31:53,163 INFO L226 Difference]: Without dead ends: 36 [2021-11-22 15:31:53,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:31:53,166 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:31:53,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:31:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-22 15:31:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-11-22 15:31:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-22 15:31:53,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-11-22 15:31:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:31:53,179 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-22 15:31:53,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-22 15:31:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 15:31:53,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:31:53,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:31:53,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 15:31:53,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:53,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:31:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:31:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -930218911, now seen corresponding path program 1 times [2021-11-22 15:31:53,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:31:53,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945121847] [2021-11-22 15:31:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:53,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:31:53,420 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:31:53,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193064205] [2021-11-22 15:31:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:53,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:53,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:53,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:31:53,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:31:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:31:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 15:31:53,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:31:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:53,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:31:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:54,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:31:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945121847] [2021-11-22 15:31:54,218 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:31:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193064205] [2021-11-22 15:31:54,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193064205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:31:54,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:31:54,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-22 15:31:54,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710800411] [2021-11-22 15:31:54,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:31:54,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:31:54,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:31:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:31:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:31:54,223 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:31:54,312 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-22 15:31:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:31:54,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 15:31:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:31:54,315 INFO L225 Difference]: With dead ends: 32 [2021-11-22 15:31:54,315 INFO L226 Difference]: Without dead ends: 28 [2021-11-22 15:31:54,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:31:54,318 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:31:54,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2021-11-22 15:31:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-22 15:31:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-22 15:31:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-22 15:31:54,329 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2021-11-22 15:31:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:31:54,329 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-22 15:31:54,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-22 15:31:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 15:31:54,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:31:54,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-22 15:31:54,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:31:54,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:54,557 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:31:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:31:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1501546963, now seen corresponding path program 2 times [2021-11-22 15:31:54,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:31:54,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816479982] [2021-11-22 15:31:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:54,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:31:54,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:31:54,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827627045] [2021-11-22 15:31:54,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:31:54,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:54,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:31:54,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:31:54,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:31:54,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:31:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:31:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:31:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:54,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:31:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:55,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:31:55,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816479982] [2021-11-22 15:31:55,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:31:55,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827627045] [2021-11-22 15:31:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827627045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:31:55,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:31:55,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-22 15:31:55,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493222257] [2021-11-22 15:31:55,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:31:55,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 15:31:55,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:31:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 15:31:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:31:55,542 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:31:55,829 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-11-22 15:31:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:31:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 15:31:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:31:55,833 INFO L225 Difference]: With dead ends: 46 [2021-11-22 15:31:55,833 INFO L226 Difference]: Without dead ends: 40 [2021-11-22 15:31:55,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:31:55,835 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:31:55,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-22 15:31:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-22 15:31:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-11-22 15:31:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-22 15:31:55,850 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2021-11-22 15:31:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:31:55,850 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-22 15:31:55,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-22 15:31:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:31:55,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:31:55,852 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-22 15:31:55,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:31:56,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:56,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:31:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:31:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1003891036, now seen corresponding path program 2 times [2021-11-22 15:31:56,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:31:56,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958718487] [2021-11-22 15:31:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:56,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:31:56,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:31:56,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062501617] [2021-11-22 15:31:56,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:31:56,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:56,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:56,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:31:56,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:31:56,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:31:56,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:31:56,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:31:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:31:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:56,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:31:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:31:56,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:31:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958718487] [2021-11-22 15:31:56,406 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:31:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062501617] [2021-11-22 15:31:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062501617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:31:56,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:31:56,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-22 15:31:56,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870728550] [2021-11-22 15:31:56,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:31:56,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:31:56,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:31:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:31:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:31:56,413 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:31:56,496 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-22 15:31:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:31:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 15:31:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:31:56,501 INFO L225 Difference]: With dead ends: 40 [2021-11-22 15:31:56,502 INFO L226 Difference]: Without dead ends: 36 [2021-11-22 15:31:56,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:31:56,507 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:31:56,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 53 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:31:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-22 15:31:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-22 15:31:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-22 15:31:56,538 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 27 [2021-11-22 15:31:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:31:56,538 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-22 15:31:56,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-22 15:31:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 15:31:56,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:31:56,545 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-22 15:31:56,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:31:56,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:56,761 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:31:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:31:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 232086478, now seen corresponding path program 3 times [2021-11-22 15:31:56,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:31:56,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965327909] [2021-11-22 15:31:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:31:56,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:31:56,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:31:56,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632649754] [2021-11-22 15:31:56,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:31:56,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:31:56,790 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:31:56,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:31:57,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-22 15:31:57,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-22 15:31:57,053 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 15:31:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 15:31:57,169 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 15:31:57,169 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 15:31:57,171 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-11-22 15:31:57,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-11-22 15:31:57,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-11-22 15:31:57,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:31:57,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:31:57,380 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2021-11-22 15:31:57,384 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 15:31:57,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 03:31:57 BoogieIcfgContainer [2021-11-22 15:31:57,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 15:31:57,426 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 15:31:57,426 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 15:31:57,426 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 15:31:57,427 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:31:49" (3/4) ... [2021-11-22 15:31:57,429 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-22 15:31:57,491 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 15:31:57,491 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 15:31:57,492 INFO L158 Benchmark]: Toolchain (without parser) took 8629.53ms. Allocated memory was 123.7MB in the beginning and 155.2MB in the end (delta: 31.5MB). Free memory was 93.4MB in the beginning and 66.0MB in the end (delta: 27.3MB). Peak memory consumption was 58.6MB. Max. memory is 16.1GB. [2021-11-22 15:31:57,492 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 88.1MB. Free memory was 46.7MB in the beginning and 46.7MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:31:57,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.39ms. Allocated memory is still 123.7MB. Free memory was 93.1MB in the beginning and 99.7MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 15:31:57,493 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.92ms. Allocated memory is still 123.7MB. Free memory was 99.7MB in the beginning and 98.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 15:31:57,494 INFO L158 Benchmark]: Boogie Preprocessor took 48.25ms. Allocated memory is still 123.7MB. Free memory was 98.2MB in the beginning and 97.5MB in the end (delta: 770.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:31:57,494 INFO L158 Benchmark]: RCFGBuilder took 439.42ms. Allocated memory is still 123.7MB. Free memory was 97.3MB in the beginning and 87.9MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 15:31:57,495 INFO L158 Benchmark]: TraceAbstraction took 7590.03ms. Allocated memory was 123.7MB in the beginning and 155.2MB in the end (delta: 31.5MB). Free memory was 87.5MB in the beginning and 69.2MB in the end (delta: 18.3MB). Peak memory consumption was 51.2MB. Max. memory is 16.1GB. [2021-11-22 15:31:57,496 INFO L158 Benchmark]: Witness Printer took 65.13ms. Allocated memory is still 155.2MB. Free memory was 69.2MB in the beginning and 66.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-22 15:31:57,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 88.1MB. Free memory was 46.7MB in the beginning and 46.7MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.39ms. Allocated memory is still 123.7MB. Free memory was 93.1MB in the beginning and 99.7MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.92ms. Allocated memory is still 123.7MB. Free memory was 99.7MB in the beginning and 98.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.25ms. Allocated memory is still 123.7MB. Free memory was 98.2MB in the beginning and 97.5MB in the end (delta: 770.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 439.42ms. Allocated memory is still 123.7MB. Free memory was 97.3MB in the beginning and 87.9MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7590.03ms. Allocated memory was 123.7MB in the beginning and 155.2MB in the end (delta: 31.5MB). Free memory was 87.5MB in the beginning and 69.2MB in the end (delta: 18.3MB). Peak memory consumption was 51.2MB. Max. memory is 16.1GB. * Witness Printer took 65.13ms. Allocated memory is still 155.2MB. Free memory was 69.2MB in the beginning and 66.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=6, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, counter++=0, k=6, x=0, y=0] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=6, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, counter++=1, k=6, x=1, y=1] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=6, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, counter++=2, k=6, x=9, y=2] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=3, counter=3, k=6, x=36, y=3] [L27] EXPR counter++ VAL [c=3, counter=4, counter++=3, k=6, x=36, y=3] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=4, counter=4, k=6, x=100, y=4] [L27] EXPR counter++ VAL [c=4, counter=5, counter++=4, k=6, x=100, y=4] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=5, counter=5, k=6, x=225, y=5] [L27] EXPR counter++ VAL [c=5, counter=6, counter++=5, k=6, x=225, y=5] [L27] COND FALSE !(counter++<5) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: 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 1 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 7.4s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 95 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 95 mSDsluCounter, 309 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 23 IncrementalHoareTripleChecker+Unchecked, 235 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 140 IncrementalHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 74 mSDtfsCounter, 140 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, InterpolantAutomatonStates: 52, 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, 6 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 165 ConstructedInterpolants, 15 QuantifiedInterpolants, 1164 SizeOfPredicates, 21 NumberOfNonLiveVariables, 458 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 2/126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-22 15:31:57,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73bbf4d9-935f-4639-a6f1-67d2dbcc86a6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE