./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/mod4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invariants/mod4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y --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 78a0c24aec4481c7f7921f4597a2470b78929a6691a425a752074aa853d4d524 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:52:41,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:52:41,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:52:41,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:52:41,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:52:41,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:52:41,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:52:41,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:52:41,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:52:41,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:52:41,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:52:41,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:52:41,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:52:41,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:52:41,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:52:41,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:52:41,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:52:41,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:52:41,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:52:41,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:52:41,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:52:41,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:52:41,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:52:41,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:52:41,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:52:41,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:52:41,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:52:41,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:52:41,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:52:41,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:52:41,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:52:41,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:52:41,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:52:41,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:52:41,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:52:41,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:52:41,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:52:41,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:52:41,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:52:41,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:52:41,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:52:41,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:52:41,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:52:41,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:52:41,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:52:41,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:52:41,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:52:41,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:52:41,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:52:41,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:52:41,450 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:52:41,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:52:41,452 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:52:41,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:52:41,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:52:41,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:52:41,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:52:41,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:52:41,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:52:41,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:52:41,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:52:41,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:52:41,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:52:41,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:52:41,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:52:41,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:52:41,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:52:41,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:52:41,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:52:41,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:52:41,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:52:41,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:52:41,459 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:52:41,459 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:52:41,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:52:41,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:52:41,460 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_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78a0c24aec4481c7f7921f4597a2470b78929a6691a425a752074aa853d4d524 [2021-11-13 18:52:41,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:52:41,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:52:41,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:52:41,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:52:41,885 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:52:41,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/loop-invariants/mod4.c [2021-11-13 18:52:41,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/data/eb79dbf23/708162bfb3834801bbdd0c0ca9c7c69d/FLAGde25b8a82 [2021-11-13 18:52:42,589 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:52:42,590 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/sv-benchmarks/c/loop-invariants/mod4.c [2021-11-13 18:52:42,596 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/data/eb79dbf23/708162bfb3834801bbdd0c0ca9c7c69d/FLAGde25b8a82 [2021-11-13 18:52:42,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/data/eb79dbf23/708162bfb3834801bbdd0c0ca9c7c69d [2021-11-13 18:52:42,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:52:42,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:52:42,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:52:42,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:52:42,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:52:42,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:52:42" (1/1) ... [2021-11-13 18:52:42,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa16131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:42, skipping insertion in model container [2021-11-13 18:52:42,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:52:42" (1/1) ... [2021-11-13 18:52:42,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:52:42,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:52:43,196 WARN L228 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_165502f8-4a73-4ab8-9e3f-30fd8885c940/sv-benchmarks/c/loop-invariants/mod4.c[351,364] [2021-11-13 18:52:43,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:52:43,227 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:52:43,242 WARN L228 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_165502f8-4a73-4ab8-9e3f-30fd8885c940/sv-benchmarks/c/loop-invariants/mod4.c[351,364] [2021-11-13 18:52:43,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:52:43,262 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:52:43,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43 WrapperNode [2021-11-13 18:52:43,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:52:43,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:52:43,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:52:43,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:52:43,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:52:43,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:52:43,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:52:43,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:52:43,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:52:43,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:52:43,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:52:43,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:52:43,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (1/1) ... [2021-11-13 18:52:43,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:52:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:43,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:52:43,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:52:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:52:43,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:52:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:52:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:52:43,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:52:43,649 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:52:43,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:52:43 BoogieIcfgContainer [2021-11-13 18:52:43,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:52:43,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:52:43,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:52:43,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:52:43,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:52:42" (1/3) ... [2021-11-13 18:52:43,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8137cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:52:43, skipping insertion in model container [2021-11-13 18:52:43,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:43" (2/3) ... [2021-11-13 18:52:43,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8137cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:52:43, skipping insertion in model container [2021-11-13 18:52:43,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:52:43" (3/3) ... [2021-11-13 18:52:43,661 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2021-11-13 18:52:43,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:52:43,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:52:43,730 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:52:43,740 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 [2021-11-13 18:52:43,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:52:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-11-13 18:52:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 18:52:43,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:43,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 18:52:43,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2021-11-13 18:52:43,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:43,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230458201] [2021-11-13 18:52:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:43,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:44,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:44,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230458201] [2021-11-13 18:52:44,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230458201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:44,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:44,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:52:44,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093994365] [2021-11-13 18:52:44,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:44,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:52:44,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:52:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:52:44,081 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 3.0) internal successors, (6), 2 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) [2021-11-13 18:52:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:44,120 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-13 18:52:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:52:44,124 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 [2021-11-13 18:52:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:44,135 INFO L225 Difference]: With dead ends: 20 [2021-11-13 18:52:44,136 INFO L226 Difference]: Without dead ends: 8 [2021-11-13 18:52:44,139 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 [2021-11-13 18:52:44,147 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:44,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:52:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-13 18:52:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-13 18:52:44,206 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) [2021-11-13 18:52:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-13 18:52:44,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-13 18:52:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:44,211 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-13 18:52:44,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-13 18:52:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-13 18:52:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:52:44,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:44,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:44,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:52:44,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1806847180, now seen corresponding path program 1 times [2021-11-13 18:52:44,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:44,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131896223] [2021-11-13 18:52:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:44,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:44,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:44,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131896223] [2021-11-13 18:52:44,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131896223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:44,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:44,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:52:44,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933822891] [2021-11-13 18:52:44,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:44,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:52:44,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:52:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:52:44,421 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-11-13 18:52:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:44,490 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-13 18:52:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:52:44,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2021-11-13 18:52:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:44,491 INFO L225 Difference]: With dead ends: 14 [2021-11-13 18:52:44,492 INFO L226 Difference]: Without dead ends: 10 [2021-11-13 18:52:44,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:52:44,494 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:44,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.60ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 42.60ms Time] [2021-11-13 18:52:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-13 18:52:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-13 18:52:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-11-13 18:52:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-13 18:52:44,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-13 18:52:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:44,500 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-13 18:52:44,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-11-13 18:52:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-13 18:52:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 18:52:44,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:44,507 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:44,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:52:44,508 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1262026695, now seen corresponding path program 1 times [2021-11-13 18:52:44,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:44,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120956002] [2021-11-13 18:52:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:44,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:44,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:44,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120956002] [2021-11-13 18:52:44,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120956002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:44,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515492410] [2021-11-13 18:52:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:44,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:44,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:44,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:52:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:52:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:44,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:52:45,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515492410] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:45,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:52:45,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2021-11-13 18:52:45,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156763053] [2021-11-13 18:52:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:45,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:52:45,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:52:45,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:52:45,044 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-13 18:52:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:45,065 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-11-13 18:52:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:52:45,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) Word has length 9 [2021-11-13 18:52:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:45,067 INFO L225 Difference]: With dead ends: 10 [2021-11-13 18:52:45,067 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 18:52:45,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:52:45,073 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:45,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 3 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 5.14ms Time] [2021-11-13 18:52:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 18:52:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 18:52:45,079 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) [2021-11-13 18:52:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 18:52:45,079 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-11-13 18:52:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:45,080 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 18:52:45,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-13 18:52:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 18:52:45,081 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 18:52:45,085 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:52:45,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:45,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:45,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 18:52:45,324 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-13 18:52:45,324 INFO L861 garLoopResultBuilder]: At program point L17(lines 11 18) the Hoare annotation is: true [2021-11-13 18:52:45,324 INFO L858 garLoopResultBuilder]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2021-11-13 18:52:45,325 INFO L854 garLoopResultBuilder]: At program point L13-3(lines 13 15) the Hoare annotation is: (= (mod |ULTIMATE.start_main_~x~0#1| 4) 0) [2021-11-13 18:52:45,325 INFO L858 garLoopResultBuilder]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2021-11-13 18:52:45,325 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-11-13 18:52:45,325 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-13 18:52:45,326 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-13 18:52:45,326 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-13 18:52:45,326 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-11-13 18:52:45,326 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-11-13 18:52:45,327 INFO L861 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-11-13 18:52:45,330 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-13 18:52:45,332 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:52:45,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:52:45 BoogieIcfgContainer [2021-11-13 18:52:45,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:52:45,348 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:52:45,348 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:52:45,349 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:52:45,349 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:52:43" (3/4) ... [2021-11-13 18:52:45,353 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 18:52:45,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-13 18:52:45,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-13 18:52:45,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-13 18:52:45,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 18:52:45,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 18:52:45,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:52:45,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:52:45,401 INFO L158 Benchmark]: Toolchain (without parser) took 2440.15ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 63.0MB in the beginning and 70.2MB in the end (delta: -7.2MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2021-11-13 18:52:45,401 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:52:45,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.67ms. Allocated memory is still 96.5MB. Free memory was 62.8MB in the beginning and 71.7MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:52:45,403 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.60ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 70.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:52:45,403 INFO L158 Benchmark]: Boogie Preprocessor took 26.24ms. Allocated memory is still 96.5MB. Free memory was 70.1MB in the beginning and 69.1MB in the end (delta: 968.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:52:45,404 INFO L158 Benchmark]: RCFGBuilder took 320.08ms. Allocated memory is still 96.5MB. Free memory was 69.1MB in the beginning and 60.2MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:52:45,404 INFO L158 Benchmark]: TraceAbstraction took 1694.02ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 59.9MB in the beginning and 72.9MB in the end (delta: -13.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2021-11-13 18:52:45,405 INFO L158 Benchmark]: Witness Printer took 52.10ms. Allocated memory is still 123.7MB. Free memory was 72.9MB in the beginning and 70.2MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:52:45,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 49.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.67ms. Allocated memory is still 96.5MB. Free memory was 62.8MB in the beginning and 71.7MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.60ms. Allocated memory is still 96.5MB. Free memory was 71.7MB in the beginning and 70.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.24ms. Allocated memory is still 96.5MB. Free memory was 70.1MB in the beginning and 69.1MB in the end (delta: 968.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 320.08ms. Allocated memory is still 96.5MB. Free memory was 69.1MB in the beginning and 60.2MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1694.02ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 59.9MB in the beginning and 72.9MB in the end (delta: -13.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Witness Printer took 52.10ms. Allocated memory is still 123.7MB. Free memory was 72.9MB in the beginning and 70.2MB in the end (delta: 2.7MB). 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 - PositiveResult [Line: 7]: 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: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, 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, 47.74ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 37 SdHoareTripleChecker+Invalid, 44.94ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 22 mSDtfsCounter, 10 mSolverCounterSat, 2.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 10, 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, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 7 HoareAnnotationTreeSize, 3 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 115 SizeOfPredicates, 2 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 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: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x % 4 == 0 RESULT: Ultimate proved your program to be correct! [2021-11-13 18:52:45,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165502f8-4a73-4ab8-9e3f-30fd8885c940/bin/uautomizer-YU5uOKAj3y/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