./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/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_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/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_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/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 d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:10:32,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:10:32,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:10:32,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:10:32,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:10:32,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:10:32,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:10:32,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:10:32,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:10:32,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:10:32,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:10:32,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:10:32,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:10:32,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:10:32,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:10:32,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:10:32,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:10:32,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:10:32,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:10:32,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:10:32,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:10:32,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:10:32,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:10:32,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:10:32,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:10:32,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:10:32,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:10:32,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:10:32,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:10:32,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:10:32,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:10:32,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:10:32,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:10:32,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:10:32,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:10:32,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:10:32,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:10:32,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:10:32,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:10:32,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:10:32,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:10:32,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:10:32,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:10:32,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:10:32,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:10:32,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:10:32,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:10:32,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:10:32,448 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:10:32,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:10:32,448 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:10:32,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:10:32,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:10:32,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:10:32,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:10:32,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:10:32,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:10:32,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:10:32,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:10:32,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:10:32,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:10:32,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:10:32,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:10:32,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:10:32,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:10:32,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:10:32,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:10:32,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:10:32,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:10:32,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:10:32,453 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:10:32,453 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:10:32,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:10:32,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:10:32,454 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_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f [2021-11-22 16:10:32,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:10:32,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:10:32,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:10:32,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:10:32,730 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:10:32,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/loop-simple/nested_2.c [2021-11-22 16:10:32,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/data/448849e9b/ae009f774ce6478f8587c3041d255e8d/FLAG8107f062e [2021-11-22 16:10:33,268 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:10:33,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/sv-benchmarks/c/loop-simple/nested_2.c [2021-11-22 16:10:33,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/data/448849e9b/ae009f774ce6478f8587c3041d255e8d/FLAG8107f062e [2021-11-22 16:10:33,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/data/448849e9b/ae009f774ce6478f8587c3041d255e8d [2021-11-22 16:10:33,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:10:33,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:10:33,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:10:33,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:10:33,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:10:33,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25136e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33, skipping insertion in model container [2021-11-22 16:10:33,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:10:33,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:10:33,841 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_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-22 16:10:33,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:10:33,858 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:10:33,892 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_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-22 16:10:33,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:10:33,904 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:10:33,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33 WrapperNode [2021-11-22 16:10:33,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:10:33,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:10:33,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:10:33,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:10:33,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,936 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-11-22 16:10:33,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:10:33,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:10:33,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:10:33,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:10:33,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:10:33,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:10:33,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:10:33,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:10:33,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (1/1) ... [2021-11-22 16:10:33,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:10:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:33,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:10:34,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:10:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:10:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:10:34,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:10:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:10:34,090 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:10:34,091 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:10:34,223 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:10:34,228 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:10:34,242 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 16:10:34,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:10:34 BoogieIcfgContainer [2021-11-22 16:10:34,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:10:34,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:10:34,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:10:34,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:10:34,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:10:33" (1/3) ... [2021-11-22 16:10:34,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c60c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:10:34, skipping insertion in model container [2021-11-22 16:10:34,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:33" (2/3) ... [2021-11-22 16:10:34,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c60c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:10:34, skipping insertion in model container [2021-11-22 16:10:34,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:10:34" (3/3) ... [2021-11-22 16:10:34,253 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2021-11-22 16:10:34,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:10:34,264 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:10:34,328 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:10:34,337 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 16:10:34,338 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:10:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-22 16:10:34,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:34,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-22 16:10:34,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2021-11-22 16:10:34,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:34,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855858370] [2021-11-22 16:10:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:34,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:34,576 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 16:10:34,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855858370] [2021-11-22 16:10:34,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855858370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:10:34,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:10:34,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:10:34,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770650732] [2021-11-22 16:10:34,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:10:34,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:10:34,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:10:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:10:34,661 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 16:10:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:34,714 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-11-22 16:10:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:10:34,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-22 16:10:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:34,725 INFO L225 Difference]: With dead ends: 28 [2021-11-22 16:10:34,725 INFO L226 Difference]: Without dead ends: 13 [2021-11-22 16:10:34,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 16:10:34,732 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:34,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:10:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-22 16:10:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2021-11-22 16:10:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 16:10:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-22 16:10:34,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2021-11-22 16:10:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:34,765 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-22 16:10:34,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 16:10:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-22 16:10:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 16:10:34,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:34,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:34,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:10:34,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:34,768 INFO L85 PathProgramCache]: Analyzing trace with hash 269344378, now seen corresponding path program 1 times [2021-11-22 16:10:34,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:34,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190044904] [2021-11-22 16:10:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:34,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:34,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190044904] [2021-11-22 16:10:34,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190044904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:10:34,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:10:34,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:10:34,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103371077] [2021-11-22 16:10:34,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:10:34,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:10:34,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:10:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:10:34,847 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 16:10:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:34,884 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-22 16:10:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:10:34,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 8 [2021-11-22 16:10:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:34,886 INFO L225 Difference]: With dead ends: 19 [2021-11-22 16:10:34,886 INFO L226 Difference]: Without dead ends: 12 [2021-11-22 16:10:34,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 16:10:34,888 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:34,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:10:34,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-22 16:10:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-22 16:10:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 16:10:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-22 16:10:34,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-22 16:10:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:34,894 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-22 16:10:34,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 16:10:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-22 16:10:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 16:10:34,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:34,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:34,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:10:34,896 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1485378760, now seen corresponding path program 1 times [2021-11-22 16:10:34,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:34,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125653800] [2021-11-22 16:10:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:34,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:34,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125653800] [2021-11-22 16:10:34,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125653800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279519706] [2021-11-22 16:10:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:34,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:34,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:34,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:34,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:10:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:10:35,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:35,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:10:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:35,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279519706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:35,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:10:35,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 16:10:35,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919197920] [2021-11-22 16:10:35,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:35,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:10:35,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:10:35,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:10:35,097 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:35,128 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-22 16:10:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:10:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 16:10:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:35,130 INFO L225 Difference]: With dead ends: 25 [2021-11-22 16:10:35,130 INFO L226 Difference]: Without dead ends: 17 [2021-11-22 16:10:35,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:10:35,132 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:35,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:10:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-22 16:10:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-22 16:10:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-22 16:10:35,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2021-11-22 16:10:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:35,138 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-22 16:10:35,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-22 16:10:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:10:35,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:35,139 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:35,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:10:35,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-22 16:10:35,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash 697844850, now seen corresponding path program 2 times [2021-11-22 16:10:35,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:35,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291145514] [2021-11-22 16:10:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:35,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 16:10:35,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291145514] [2021-11-22 16:10:35,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291145514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367031282] [2021-11-22 16:10:35,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:10:35,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:35,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:35,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:35,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:10:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:10:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:10:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:10:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:35,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:10:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:35,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367031282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:35,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:10:35,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2021-11-22 16:10:35,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281908541] [2021-11-22 16:10:35,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:35,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:10:35,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:10:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:10:35,630 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:35,814 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-11-22 16:10:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 16:10:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:10:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:35,816 INFO L225 Difference]: With dead ends: 64 [2021-11-22 16:10:35,816 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 16:10:35,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:10:35,819 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:35,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:10:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 16:10:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-11-22 16:10:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-22 16:10:35,829 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2021-11-22 16:10:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:35,829 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-22 16:10:35,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-22 16:10:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 16:10:35,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:35,831 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-22 16:10:35,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:10:36,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:36,059 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 750610982, now seen corresponding path program 3 times [2021-11-22 16:10:36,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105091090] [2021-11-22 16:10:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:36,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-22 16:10:36,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:36,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105091090] [2021-11-22 16:10:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105091090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:36,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661621251] [2021-11-22 16:10:36,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:10:36,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:36,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:36,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:10:36,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-22 16:10:36,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:10:36,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:10:36,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-22 16:10:36,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:10:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661621251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:10:36,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:10:36,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-11-22 16:10:36,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929131929] [2021-11-22 16:10:36,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:10:36,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:10:36,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:10:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:10:36,480 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:36,529 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-22 16:10:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:10:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 16:10:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:36,532 INFO L225 Difference]: With dead ends: 36 [2021-11-22 16:10:36,532 INFO L226 Difference]: Without dead ends: 0 [2021-11-22 16:10:36,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:10:36,536 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:36,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:10:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-22 16:10:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-22 16:10:36,539 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 16:10:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-22 16:10:36,539 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-11-22 16:10:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:36,539 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-22 16:10:36,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-22 16:10:36,540 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-22 16:10:36,545 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 16:10:36,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:10:36,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:36,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-22 16:10:36,838 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-22 16:10:36,838 INFO L858 garLoopResultBuilder]: For program point L25-1(lines 25 27) no Hoare annotation was computed. [2021-11-22 16:10:36,839 INFO L858 garLoopResultBuilder]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2021-11-22 16:10:36,839 INFO L854 garLoopResultBuilder]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (< |ULTIMATE.start_main_~a~0#1| 6) (< |ULTIMATE.start_main_~b~0#1| 7)) [2021-11-22 16:10:36,839 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-22 16:10:36,839 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-22 16:10:36,839 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-22 16:10:36,839 INFO L861 garLoopResultBuilder]: At program point L28(lines 15 29) the Hoare annotation is: true [2021-11-22 16:10:36,840 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-11-22 16:10:36,840 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2021-11-22 16:10:36,840 INFO L858 garLoopResultBuilder]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2021-11-22 16:10:36,840 INFO L854 garLoopResultBuilder]: At program point L20-3(lines 20 24) the Hoare annotation is: (and (<= 6 |ULTIMATE.start_main_~b~0#1|) (< |ULTIMATE.start_main_~a~0#1| 7) (< |ULTIMATE.start_main_~b~0#1| 7)) [2021-11-22 16:10:36,840 INFO L858 garLoopResultBuilder]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2021-11-22 16:10:36,844 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-22 16:10:36,845 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 16:10:36,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 04:10:36 BoogieIcfgContainer [2021-11-22 16:10:36,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 16:10:36,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 16:10:36,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 16:10:36,859 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 16:10:36,860 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:10:34" (3/4) ... [2021-11-22 16:10:36,862 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-22 16:10:36,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-22 16:10:36,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-22 16:10:36,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-22 16:10:36,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-22 16:10:36,899 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 16:10:36,899 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 16:10:36,900 INFO L158 Benchmark]: Toolchain (without parser) took 3274.76ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 87.6MB in the beginning and 97.2MB in the end (delta: -9.6MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2021-11-22 16:10:36,900 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:10:36,901 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.67ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 88.0MB in the end (delta: -378.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 16:10:36,901 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.41ms. Allocated memory is still 113.2MB. Free memory was 88.0MB in the beginning and 86.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:10:36,902 INFO L158 Benchmark]: Boogie Preprocessor took 18.49ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 85.8MB in the end (delta: 730.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:10:36,902 INFO L158 Benchmark]: RCFGBuilder took 288.15ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 77.1MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 16:10:36,903 INFO L158 Benchmark]: TraceAbstraction took 2612.16ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 76.7MB in the beginning and 99.3MB in the end (delta: -22.5MB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. [2021-11-22 16:10:36,903 INFO L158 Benchmark]: Witness Printer took 40.73ms. Allocated memory is still 136.3MB. Free memory was 99.3MB in the beginning and 97.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:10:36,906 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.67ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 88.0MB in the end (delta: -378.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.41ms. Allocated memory is still 113.2MB. Free memory was 88.0MB in the beginning and 86.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.49ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 85.8MB in the end (delta: 730.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 288.15ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 77.1MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2612.16ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 76.7MB in the beginning and 99.3MB in the end (delta: -22.5MB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. * Witness Printer took 40.73ms. Allocated memory is still 136.3MB. Free memory was 99.3MB in the beginning and 97.2MB in the end (delta: 2.1MB). 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: 26]: 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, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 5, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 80 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 44 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 97 IncrementalHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 36 mSDtfsCounter, 97 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 41, 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, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 21 NumberOfFragments, 18 HoareAnnotationTreeSize, 3 FomulaSimplifications, 141 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 113 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 151 ConstructedInterpolants, 0 QuantifiedInterpolants, 359 SizeOfPredicates, 2 NumberOfNonLiveVariables, 171 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 255/380 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: 21]: Loop Invariant Derived loop invariant: a < 6 && b < 7 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (6 <= b && a < 7) && b < 7 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-22 16:10:36,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9702a03f-b1ba-4700-98cd-5e6f8a3c6347/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