./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY --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 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:04:56,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:04:56,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:04:56,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:04:56,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:04:56,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:04:56,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:04:56,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:04:56,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:04:56,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:04:56,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:04:57,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:04:57,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:04:57,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:04:57,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:04:57,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:04:57,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:04:57,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:04:57,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:04:57,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:04:57,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:04:57,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:04:57,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:04:57,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:04:57,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:04:57,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:04:57,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:04:57,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:04:57,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:04:57,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:04:57,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:04:57,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:04:57,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:04:57,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:04:57,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:04:57,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:04:57,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:04:57,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:04:57,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:04:57,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:04:57,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:04:57,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:04:57,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:04:57,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:04:57,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:04:57,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:04:57,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:04:57,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:04:57,120 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:04:57,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:04:57,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:04:57,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:04:57,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:04:57,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:04:57,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:04:57,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:04:57,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:04:57,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:04:57,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:04:57,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:04:57,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:04:57,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:04:57,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:04:57,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:04:57,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:04:57,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:04:57,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:04:57,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:04:57,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:04:57,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:04:57,126 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:04:57,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:04:57,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:04:57,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:04:57,129 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_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2021-11-07 08:04:57,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:04:57,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:04:57,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:04:57,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:04:57,477 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:04:57,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/recursive/Fibonacci04.c [2021-11-07 08:04:57,572 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/data/72d8fff2b/eb1084782404400a9496bd63be09a15f/FLAG6711c6edf [2021-11-07 08:04:58,101 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:04:58,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/sv-benchmarks/c/recursive/Fibonacci04.c [2021-11-07 08:04:58,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/data/72d8fff2b/eb1084782404400a9496bd63be09a15f/FLAG6711c6edf [2021-11-07 08:04:58,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/data/72d8fff2b/eb1084782404400a9496bd63be09a15f [2021-11-07 08:04:58,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:04:58,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:04:58,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:04:58,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:04:58,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:04:58,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff0fa5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58, skipping insertion in model container [2021-11-07 08:04:58,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:04:58,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:04:58,740 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_00f26499-1857-4b42-9f2a-4b37c5caab7d/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2021-11-07 08:04:58,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:04:58,761 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:04:58,775 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_00f26499-1857-4b42-9f2a-4b37c5caab7d/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2021-11-07 08:04:58,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:04:58,793 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:04:58,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58 WrapperNode [2021-11-07 08:04:58,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:04:58,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:04:58,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:04:58,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:04:58,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:04:58,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:04:58,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:04:58,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:04:58,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:04:58,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:04:58,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:04:58,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:04:58,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (1/1) ... [2021-11-07 08:04:58,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:04:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:58,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:04:58,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:04:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-11-07 08:04:58,958 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-11-07 08:04:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:04:58,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:04:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:04:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:04:59,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:04:59,168 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 08:04:59,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:04:59 BoogieIcfgContainer [2021-11-07 08:04:59,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:04:59,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:04:59,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:04:59,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:04:59,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:04:58" (1/3) ... [2021-11-07 08:04:59,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7affc5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:04:59, skipping insertion in model container [2021-11-07 08:04:59,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:04:58" (2/3) ... [2021-11-07 08:04:59,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7affc5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:04:59, skipping insertion in model container [2021-11-07 08:04:59,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:04:59" (3/3) ... [2021-11-07 08:04:59,182 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2021-11-07 08:04:59,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:04:59,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:04:59,253 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:04:59,262 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 [2021-11-07 08:04:59,263 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:04:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:04:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:04:59,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:59,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:59,292 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash 117289724, now seen corresponding path program 1 times [2021-11-07 08:04:59,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:59,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780520785] [2021-11-07 08:04:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:59,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:59,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:04:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:59,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:59,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780520785] [2021-11-07 08:04:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780520785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:59,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:59,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:04:59,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590777380] [2021-11-07 08:04:59,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:59,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:59,767 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:59,859 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-11-07 08:04:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:04:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 08:04:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:59,870 INFO L225 Difference]: With dead ends: 31 [2021-11-07 08:04:59,871 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 08:04:59,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 08:04:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-07 08:04:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:04:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-07 08:04:59,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-11-07 08:04:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:59,921 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-07 08:04:59,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:04:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-07 08:04:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:04:59,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:59,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:59,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:04:59,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash 36927066, now seen corresponding path program 1 times [2021-11-07 08:04:59,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:59,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008345949] [2021-11-07 08:04:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:59,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:59,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:04:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:00,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:00,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008345949] [2021-11-07 08:05:00,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008345949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:00,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:00,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:05:00,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986794061] [2021-11-07 08:05:00,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:05:00,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:05:00,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:05:00,010 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:00,073 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-11-07 08:05:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:05:00,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-07 08:05:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:00,077 INFO L225 Difference]: With dead ends: 24 [2021-11-07 08:05:00,077 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:05:00,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:05:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:05:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-07 08:05:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:05:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-07 08:05:00,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-11-07 08:05:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:00,087 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-07 08:05:00,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:05:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-07 08:05:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 08:05:00,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:00,091 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:00,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:05:00,093 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:00,096 INFO L85 PathProgramCache]: Analyzing trace with hash 703243533, now seen corresponding path program 1 times [2021-11-07 08:05:00,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:00,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228217250] [2021-11-07 08:05:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:00,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:00,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:05:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:00,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:05:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:00,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:00,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228217250] [2021-11-07 08:05:00,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228217250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:00,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843628462] [2021-11-07 08:05:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:00,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:00,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:00,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:00,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:05:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:05:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:05:00,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843628462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:00,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:00,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-07 08:05:00,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113327935] [2021-11-07 08:05:00,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:05:00,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:05:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:05:00,712 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:05:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:00,836 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-07 08:05:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:05:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2021-11-07 08:05:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:00,839 INFO L225 Difference]: With dead ends: 35 [2021-11-07 08:05:00,839 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:05:00,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:05:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:05:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 08:05:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:05:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-07 08:05:00,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2021-11-07 08:05:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:00,849 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-07 08:05:00,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:05:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-07 08:05:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:05:00,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:00,852 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:00,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:01,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:01,073 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 187716987, now seen corresponding path program 1 times [2021-11-07 08:05:01,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:01,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592643869] [2021-11-07 08:05:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:01,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:05:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:05:01,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:01,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592643869] [2021-11-07 08:05:01,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592643869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:01,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63164850] [2021-11-07 08:05:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:01,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:01,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:01,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:01,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:05:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:05:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:05:01,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63164850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:01,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:01,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-11-07 08:05:01,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728693502] [2021-11-07 08:05:01,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:05:01,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:01,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:05:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:05:01,479 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:05:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:01,595 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-07 08:05:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:05:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2021-11-07 08:05:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:01,606 INFO L225 Difference]: With dead ends: 38 [2021-11-07 08:05:01,607 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 08:05:01,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:05:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 08:05:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-07 08:05:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-07 08:05:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2021-11-07 08:05:01,632 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2021-11-07 08:05:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:01,632 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2021-11-07 08:05:01,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 08:05:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2021-11-07 08:05:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:05:01,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:01,636 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:01,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:01,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:01,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1151618030, now seen corresponding path program 2 times [2021-11-07 08:05:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:01,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567908579] [2021-11-07 08:05:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:01,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:05:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:02,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:02,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-07 08:05:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 08:05:02,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:02,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567908579] [2021-11-07 08:05:02,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567908579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:02,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723742425] [2021-11-07 08:05:02,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:05:02,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:02,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:02,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:02,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:05:02,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:05:02,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:02,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:05:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 08:05:02,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723742425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:02,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:02,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-07 08:05:02,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715970687] [2021-11-07 08:05:02,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:05:02,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:05:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:05:02,472 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-07 08:05:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:02,717 INFO L93 Difference]: Finished difference Result 68 states and 103 transitions. [2021-11-07 08:05:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:05:02,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 37 [2021-11-07 08:05:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:02,721 INFO L225 Difference]: With dead ends: 68 [2021-11-07 08:05:02,721 INFO L226 Difference]: Without dead ends: 35 [2021-11-07 08:05:02,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:05:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-07 08:05:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-07 08:05:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-07 08:05:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-07 08:05:02,741 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 37 [2021-11-07 08:05:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:02,742 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-07 08:05:02,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-07 08:05:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-07 08:05:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:05:02,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:02,745 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:02,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:02,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:02,973 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:02,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:02,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1673648870, now seen corresponding path program 3 times [2021-11-07 08:05:02,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:02,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740278148] [2021-11-07 08:05:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:02,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:05:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-07 08:05:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:05:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-07 08:05:03,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:03,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740278148] [2021-11-07 08:05:03,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740278148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:03,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735313530] [2021-11-07 08:05:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:05:03,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:03,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:03,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:03,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:05:03,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:05:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:05:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-07 08:05:03,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735313530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:03,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:03,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 13 [2021-11-07 08:05:03,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824240840] [2021-11-07 08:05:03,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:05:03,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:05:03,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:05:03,657 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:05:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:03,834 INFO L93 Difference]: Finished difference Result 84 states and 123 transitions. [2021-11-07 08:05:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:05:03,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 65 [2021-11-07 08:05:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:03,842 INFO L225 Difference]: With dead ends: 84 [2021-11-07 08:05:03,843 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 08:05:03,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:05:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 08:05:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-11-07 08:05:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-07 08:05:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2021-11-07 08:05:03,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 65 [2021-11-07 08:05:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:03,884 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2021-11-07 08:05:03,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:05:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2021-11-07 08:05:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 08:05:03,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:03,902 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:03,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:04,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:05:04,125 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1511331526, now seen corresponding path program 4 times [2021-11-07 08:05:04,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:04,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376050218] [2021-11-07 08:05:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:04,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:05:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-07 08:05:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:05:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-07 08:05:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-07 08:05:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-07 08:05:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-07 08:05:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-07 08:05:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-07 08:05:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 320 proven. 96 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2021-11-07 08:05:04,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:04,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376050218] [2021-11-07 08:05:04,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376050218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:04,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726914834] [2021-11-07 08:05:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:05:04,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:04,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:04,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:04,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:05:04,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:05:04,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:05:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2021-11-07 08:05:05,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726914834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:05,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:05,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2021-11-07 08:05:05,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055324528] [2021-11-07 08:05:05,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:05:05,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:05,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:05:05,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:05:05,388 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-07 08:05:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:05,643 INFO L93 Difference]: Finished difference Result 105 states and 174 transitions. [2021-11-07 08:05:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:05:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 147 [2021-11-07 08:05:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:05,646 INFO L225 Difference]: With dead ends: 105 [2021-11-07 08:05:05,646 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 08:05:05,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:05:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 08:05:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 08:05:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-07 08:05:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-07 08:05:05,657 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 147 [2021-11-07 08:05:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:05,658 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-07 08:05:05,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-07 08:05:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-07 08:05:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 08:05:05,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:05,661 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:05,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:05,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:05,874 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2094125593, now seen corresponding path program 5 times [2021-11-07 08:05:05,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:05,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986625289] [2021-11-07 08:05:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:05,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:05:05,901 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:05:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:05:05,979 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:05:05,980 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:05:05,981 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:05:05,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:05:05,988 INFO L731 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2021-11-07 08:05:05,992 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:05:06,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:05:06 BoogieIcfgContainer [2021-11-07 08:05:06,129 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:05:06,130 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:05:06,130 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:05:06,130 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:05:06,131 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:04:59" (3/4) ... [2021-11-07 08:05:06,133 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 08:05:06,221 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 08:05:06,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:05:06,223 INFO L168 Benchmark]: Toolchain (without parser) took 7724.83 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 50.5 MB in the beginning and 57.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. [2021-11-07 08:05:06,224 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory was 66.7 MB in the beginning and 66.7 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:05:06,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.84 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 50.2 MB in the beginning and 82.3 MB in the end (delta: -32.1 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-11-07 08:05:06,225 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.44 ms. Allocated memory is still 104.9 MB. Free memory was 82.1 MB in the beginning and 80.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:05:06,226 INFO L168 Benchmark]: Boogie Preprocessor took 21.60 ms. Allocated memory is still 104.9 MB. Free memory was 80.7 MB in the beginning and 79.8 MB in the end (delta: 895.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:05:06,226 INFO L168 Benchmark]: RCFGBuilder took 313.36 ms. Allocated memory is still 104.9 MB. Free memory was 79.8 MB in the beginning and 70.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:05:06,227 INFO L168 Benchmark]: TraceAbstraction took 6956.38 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.2 MB in the beginning and 62.4 MB in the end (delta: 7.8 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2021-11-07 08:05:06,227 INFO L168 Benchmark]: Witness Printer took 91.86 ms. Allocated memory is still 125.8 MB. Free memory was 62.4 MB in the beginning and 57.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 08:05:06,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory was 66.7 MB in the beginning and 66.7 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.84 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 50.2 MB in the beginning and 82.3 MB in the end (delta: -32.1 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.44 ms. Allocated memory is still 104.9 MB. Free memory was 82.1 MB in the beginning and 80.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.60 ms. Allocated memory is still 104.9 MB. Free memory was 80.7 MB in the beginning and 79.8 MB in the end (delta: 895.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 313.36 ms. Allocated memory is still 104.9 MB. Free memory was 79.8 MB in the beginning and 70.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6956.38 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.2 MB in the beginning and 62.4 MB in the end (delta: 7.8 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. * Witness Printer took 91.86 ms. Allocated memory is still 125.8 MB. Free memory was 62.4 MB in the beginning and 57.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 35]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L30] int x = __VERIFIER_nondet_int(); [L31] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L19] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L21] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L21] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L24] return fibonacci(n-1) + fibonacci(n-2); [L31] RET, EXPR fibonacci(x) [L31] int result = fibonacci(x); [L32] COND FALSE !(x != 5 || result == 3) [L35] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.7s, OverallIterations: 8, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 198 SDslu, 313 SDs, 0 SdLazy, 593 SolverSat, 170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 453 GetRequests, 378 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=7, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 719 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 601 ConstructedInterpolants, 0 QuantifiedInterpolants, 1107 SizeOfPredicates, 15 NumberOfNonLiveVariables, 672 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2448/2834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-07 08:05:06,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f26499-1857-4b42-9f2a-4b37c5caab7d/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE