./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark26_linear.i --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_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/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_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark26_linear.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/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_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/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 8e9d1a7d7f6e24fd57d73c4a5500d4641bd0405ce39a4f7870d35144d3da8b5e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:59:52,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:59:52,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:59:52,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:59:52,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:59:52,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:59:52,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:59:52,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:59:52,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:59:52,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:59:52,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:59:52,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:59:52,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:59:52,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:59:52,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:59:52,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:59:52,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:59:52,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:59:52,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:59:52,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:59:52,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:59:52,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:59:52,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:59:52,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:59:52,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:59:52,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:59:52,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:59:52,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:59:52,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:59:52,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:59:52,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:59:52,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:59:52,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:59:52,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:59:52,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:59:52,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:59:52,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:59:52,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:59:52,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:59:52,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:59:52,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:59:52,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:59:52,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:59:52,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:59:52,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:59:52,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:59:52,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:59:52,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:59:52,344 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:59:52,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:59:52,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:59:52,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:59:52,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:59:52,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:59:52,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:59:52,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:59:52,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:59:52,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:59:52,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:59:52,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:59:52,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:59:52,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:59:52,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:59:52,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:59:52,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:59:52,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:59:52,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:59:52,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:59:52,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:59:52,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:59:52,350 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:59:52,351 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:59:52,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:59:52,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:59:52,352 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_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e9d1a7d7f6e24fd57d73c4a5500d4641bd0405ce39a4f7870d35144d3da8b5e [2021-11-22 14:59:52,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:59:52,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:59:52,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:59:52,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:59:52,745 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:59:52,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/loop-zilu/benchmark26_linear.i [2021-11-22 14:59:52,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/data/88158646a/4717b012677245b1ae2cf7f1747a9bbf/FLAG030b7bb89 [2021-11-22 14:59:53,507 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:59:53,507 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/sv-benchmarks/c/loop-zilu/benchmark26_linear.i [2021-11-22 14:59:53,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/data/88158646a/4717b012677245b1ae2cf7f1747a9bbf/FLAG030b7bb89 [2021-11-22 14:59:53,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/data/88158646a/4717b012677245b1ae2cf7f1747a9bbf [2021-11-22 14:59:53,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:59:53,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:59:53,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:59:53,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:59:53,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:59:53,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:59:53" (1/1) ... [2021-11-22 14:59:53,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b143c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:53, skipping insertion in model container [2021-11-22 14:59:53,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:59:53" (1/1) ... [2021-11-22 14:59:53,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:59:53,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:59:54,159 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_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/sv-benchmarks/c/loop-zilu/benchmark26_linear.i[868,881] [2021-11-22 14:59:54,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:59:54,199 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:59:54,219 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_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/sv-benchmarks/c/loop-zilu/benchmark26_linear.i[868,881] [2021-11-22 14:59:54,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:59:54,249 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:59:54,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54 WrapperNode [2021-11-22 14:59:54,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:59:54,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:59:54,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:59:54,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:59:54,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,297 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2021-11-22 14:59:54,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:59:54,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:59:54,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:59:54,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:59:54,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:59:54,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:59:54,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:59:54,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:59:54,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (1/1) ... [2021-11-22 14:59:54,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:59:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:59:54,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:59:54,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:59:54,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:59:54,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:59:54,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:59:54,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:59:54,549 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:59:54,551 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:59:54,734 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:59:54,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:59:54,744 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 14:59:54,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:59:54 BoogieIcfgContainer [2021-11-22 14:59:54,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:59:54,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:59:54,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:59:54,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:59:54,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:59:53" (1/3) ... [2021-11-22 14:59:54,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56db2918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:59:54, skipping insertion in model container [2021-11-22 14:59:54,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:54" (2/3) ... [2021-11-22 14:59:54,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56db2918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:59:54, skipping insertion in model container [2021-11-22 14:59:54,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:59:54" (3/3) ... [2021-11-22 14:59:54,759 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark26_linear.i [2021-11-22 14:59:54,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:59:54,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:59:54,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:59:54,843 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 14:59:54,843 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:59:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 14:59:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 14:59:54,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:54,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:54,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:54,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2021-11-22 14:59:54,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:54,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081212360] [2021-11-22 14:59:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:54,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:55,071 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 14:59:55,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081212360] [2021-11-22 14:59:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081212360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:59:55,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:59:55,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:59:55,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096572375] [2021-11-22 14:59:55,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:59:55,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:59:55,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:55,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:59:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:59:55,127 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 14:59:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:55,148 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-22 14:59:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:59:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-22 14:59:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:55,162 INFO L225 Difference]: With dead ends: 20 [2021-11-22 14:59:55,163 INFO L226 Difference]: Without dead ends: 8 [2021-11-22 14:59:55,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:59:55,171 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:55,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:59:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-22 14:59:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-22 14:59:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 14:59:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-22 14:59:55,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-11-22 14:59:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:55,214 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-22 14:59:55,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 14:59:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-22 14:59:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 14:59:55,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:55,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:55,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:59:55,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2021-11-22 14:59:55,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:55,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480664919] [2021-11-22 14:59:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:55,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:55,268 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 14:59:55,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:55,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480664919] [2021-11-22 14:59:55,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480664919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:59:55,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:59:55,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:59:55,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65464113] [2021-11-22 14:59:55,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:59:55,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:59:55,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:59:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:59:55,275 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 14:59:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:55,291 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-22 14:59:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:59:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-22 14:59:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:55,293 INFO L225 Difference]: With dead ends: 13 [2021-11-22 14:59:55,293 INFO L226 Difference]: Without dead ends: 9 [2021-11-22 14:59:55,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:59:55,296 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:55,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:59:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-22 14:59:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-22 14:59:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 14:59:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-22 14:59:55,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-11-22 14:59:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:55,303 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-22 14:59:55,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 14:59:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-22 14:59:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 14:59:55,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:55,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:55,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:59:55,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash 183170323, now seen corresponding path program 1 times [2021-11-22 14:59:55,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:55,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805093296] [2021-11-22 14:59:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:55,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:55,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805093296] [2021-11-22 14:59:55,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805093296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:59:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869400692] [2021-11-22 14:59:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:55,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:55,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:59:55,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:59:55,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:59:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:59:55,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:59:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:55,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:59:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:56,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869400692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:59:56,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:59:56,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2021-11-22 14:59:56,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443682186] [2021-11-22 14:59:56,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:59:56,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:59:56,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:59:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:59:56,041 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 14:59:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:56,094 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-11-22 14:59:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:59:56,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 8 [2021-11-22 14:59:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:56,095 INFO L225 Difference]: With dead ends: 9 [2021-11-22 14:59:56,095 INFO L226 Difference]: Without dead ends: 0 [2021-11-22 14:59:56,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:59:56,098 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:56,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:59:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-22 14:59:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-22 14:59:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 14:59:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-22 14:59:56,102 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-11-22 14:59:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:56,102 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-22 14:59:56,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 14:59:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-22 14:59:56,103 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-22 14:59:56,107 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 14:59:56,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:59:56,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:56,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-22 14:59:56,350 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-22 14:59:56,350 INFO L861 garLoopResultBuilder]: At program point L27(lines 19 28) the Hoare annotation is: true [2021-11-22 14:59:56,351 INFO L854 garLoopResultBuilder]: At program point L23-2(lines 23 25) the Hoare annotation is: (< |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~y~0#1| 1)) [2021-11-22 14:59:56,351 INFO L858 garLoopResultBuilder]: For program point L23-3(lines 23 25) no Hoare annotation was computed. [2021-11-22 14:59:56,352 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-22 14:59:56,352 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-22 14:59:56,353 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-22 14:59:56,353 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-22 14:59:56,353 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-11-22 14:59:56,354 INFO L858 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-11-22 14:59:56,354 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-22 14:59:56,355 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-11-22 14:59:56,360 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-22 14:59:56,362 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 14:59:56,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:59:56 BoogieIcfgContainer [2021-11-22 14:59:56,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 14:59:56,383 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 14:59:56,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 14:59:56,384 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 14:59:56,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:59:54" (3/4) ... [2021-11-22 14:59:56,389 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-22 14:59:56,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-22 14:59:56,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-22 14:59:56,404 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-22 14:59:56,404 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-22 14:59:56,452 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 14:59:56,452 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 14:59:56,453 INFO L158 Benchmark]: Toolchain (without parser) took 2601.44ms. Allocated memory was 104.9MB in the beginning and 130.0MB in the end (delta: 25.2MB). Free memory was 63.3MB in the beginning and 95.5MB in the end (delta: -32.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:59:56,454 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 104.9MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:59:56,455 INFO L158 Benchmark]: CACSL2BoogieTranslator took 382.96ms. Allocated memory is still 104.9MB. Free memory was 63.1MB in the beginning and 80.1MB in the end (delta: -16.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 14:59:56,456 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.04ms. Allocated memory is still 104.9MB. Free memory was 80.1MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:59:56,456 INFO L158 Benchmark]: Boogie Preprocessor took 39.03ms. Allocated memory is still 104.9MB. Free memory was 78.7MB in the beginning and 77.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:59:56,457 INFO L158 Benchmark]: RCFGBuilder took 407.69ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 68.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 14:59:56,458 INFO L158 Benchmark]: TraceAbstraction took 1632.99ms. Allocated memory was 104.9MB in the beginning and 130.0MB in the end (delta: 25.2MB). Free memory was 68.3MB in the beginning and 97.5MB in the end (delta: -29.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:59:56,459 INFO L158 Benchmark]: Witness Printer took 68.76ms. Allocated memory is still 130.0MB. Free memory was 97.5MB in the beginning and 95.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:59:56,462 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 104.9MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 382.96ms. Allocated memory is still 104.9MB. Free memory was 63.1MB in the beginning and 80.1MB in the end (delta: -16.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.04ms. Allocated memory is still 104.9MB. Free memory was 80.1MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.03ms. Allocated memory is still 104.9MB. Free memory was 78.7MB in the beginning and 77.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 407.69ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 68.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1632.99ms. Allocated memory was 104.9MB in the beginning and 130.0MB in the end (delta: 25.2MB). Free memory was 68.3MB in the beginning and 97.5MB in the end (delta: -29.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 68.76ms. Allocated memory is still 130.0MB. Free memory was 97.5MB in the beginning and 95.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18 IncrementalHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 23 mSDtfsCounter, 18 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 6 HoareAnnotationTreeSize, 2 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 90 SizeOfPredicates, 5 NumberOfNonLiveVariables, 37 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x < y + 1 RESULT: Ultimate proved your program to be correct! [2021-11-22 14:59:56,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af0c9e3-b3c7-49ea-83ea-3dd28bb9effb/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 Result: TRUE