./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt --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 f684876205455ff045e7b27eb3c5cbf35fa59fa1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:01:50,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:01:50,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:01:50,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:01:50,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:01:50,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:01:50,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:01:50,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:01:50,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:01:50,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:01:50,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:01:51,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:01:51,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:01:51,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:01:51,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:01:51,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:01:51,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:01:51,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:01:51,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:01:51,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:01:51,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:01:51,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:01:51,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:01:51,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:01:51,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:01:51,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:01:51,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:01:51,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:01:51,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:01:51,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:01:51,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:01:51,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:01:51,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:01:51,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:01:51,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:01:51,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:01:51,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:01:51,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:01:51,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:01:51,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:01:51,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:01:51,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:01:51,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:01:51,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:01:51,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:01:51,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:01:51,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:01:51,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:01:51,100 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:01:51,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:01:51,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:01:51,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:01:51,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:01:51,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:01:51,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:01:51,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:01:51,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:01:51,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:01:51,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:01:51,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:01:51,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:01:51,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:01:51,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:01:51,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:01:51,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:01:51,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:01:51,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:01:51,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:01:51,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:01:51,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:01:51,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:01:51,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:01:51,108 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_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f684876205455ff045e7b27eb3c5cbf35fa59fa1 [2021-10-13 00:01:51,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:01:51,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:01:51,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:01:51,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:01:51,378 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:01:51,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2021-10-13 00:01:51,449 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/data/5033aac38/674fa47bee864273a5e00784a665caaa/FLAG203428121 [2021-10-13 00:01:51,835 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:01:51,836 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2021-10-13 00:01:51,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/data/5033aac38/674fa47bee864273a5e00784a665caaa/FLAG203428121 [2021-10-13 00:01:52,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/data/5033aac38/674fa47bee864273a5e00784a665caaa [2021-10-13 00:01:52,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:01:52,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:01:52,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:01:52,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:01:52,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:01:52,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9e90c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52, skipping insertion in model container [2021-10-13 00:01:52,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:01:52,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:01:52,440 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_40e0789c-59ca-453a-b6b7-334fc544a2bf/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c[946,959] [2021-10-13 00:01:52,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:01:52,458 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:01:52,477 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_40e0789c-59ca-453a-b6b7-334fc544a2bf/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c[946,959] [2021-10-13 00:01:52,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:01:52,489 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:01:52,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52 WrapperNode [2021-10-13 00:01:52,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:01:52,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:01:52,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:01:52,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:01:52,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:01:52,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:01:52,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:01:52,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:01:52,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:01:52,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:01:52,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:01:52,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:01:52,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (1/1) ... [2021-10-13 00:01:52,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:01:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:52,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:01:52,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:01:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:01:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-10-13 00:01:52,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-10-13 00:01:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:01:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-10-13 00:01:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-10-13 00:01:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:01:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:01:52,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:01:52,839 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 00:01:52,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:52 BoogieIcfgContainer [2021-10-13 00:01:52,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:01:52,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:01:52,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:01:52,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:01:52,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:01:52" (1/3) ... [2021-10-13 00:01:52,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aefc1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:01:52, skipping insertion in model container [2021-10-13 00:01:52,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:52" (2/3) ... [2021-10-13 00:01:52,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aefc1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:01:52, skipping insertion in model container [2021-10-13 00:01:52,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:52" (3/3) ... [2021-10-13 00:01:52,849 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2021-10-13 00:01:52,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:01:52,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:01:52,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:01:52,944 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 00:01:52,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:01:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:01:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:01:52,996 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:52,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:52,997 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:53,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-10-13 00:01:53,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:53,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519145172] [2021-10-13 00:01:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:53,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:53,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:53,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519145172] [2021-10-13 00:01:53,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519145172] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:53,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:53,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:01:53,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210008477] [2021-10-13 00:01:53,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:01:53,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:01:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:53,288 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-10-13 00:01:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:53,329 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-10-13 00:01:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:01:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2021-10-13 00:01:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:53,338 INFO L225 Difference]: With dead ends: 43 [2021-10-13 00:01:53,339 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:01:53,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:01:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 00:01:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-13 00:01:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-13 00:01:53,390 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-10-13 00:01:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:53,391 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-13 00:01:53,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-10-13 00:01:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-10-13 00:01:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:01:53,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:53,393 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:53,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:01:53,393 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-10-13 00:01:53,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:53,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5440439] [2021-10-13 00:01:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:53,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:53,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:53,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5440439] [2021-10-13 00:01:53,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5440439] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:53,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:53,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:01:53,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597207748] [2021-10-13 00:01:53,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:01:53,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:01:53,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:53,510 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2021-10-13 00:01:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:53,542 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-10-13 00:01:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:01:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2021-10-13 00:01:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:53,545 INFO L225 Difference]: With dead ends: 33 [2021-10-13 00:01:53,545 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:01:53,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:01:53,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:01:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-10-13 00:01:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-13 00:01:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-13 00:01:53,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-10-13 00:01:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:53,554 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-13 00:01:53,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2021-10-13 00:01:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-10-13 00:01:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:01:53,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:53,556 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:53,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:01:53,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-10-13 00:01:53,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:53,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884190753] [2021-10-13 00:01:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:53,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:01:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:01:53,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:53,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884190753] [2021-10-13 00:01:53,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884190753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:53,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153513980] [2021-10-13 00:01:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:53,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:53,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:53,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:01:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:01:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:01:53,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153513980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:53,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:53,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-10-13 00:01:53,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301829412] [2021-10-13 00:01:53,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:01:53,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:01:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:01:53,987 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 00:01:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:54,124 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-10-13 00:01:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:01:54,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) Word has length 23 [2021-10-13 00:01:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:54,128 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:01:54,128 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 00:01:54,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:01:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 00:01:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-10-13 00:01:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-13 00:01:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-10-13 00:01:54,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-10-13 00:01:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:54,150 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-10-13 00:01:54,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 00:01:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-10-13 00:01:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:01:54,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:54,155 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:54,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:54,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:54,380 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:54,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-10-13 00:01:54,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:54,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941590572] [2021-10-13 00:01:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:54,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:54,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:54,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:54,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:01:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:01:54,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:54,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941590572] [2021-10-13 00:01:54,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941590572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:54,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364388048] [2021-10-13 00:01:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:54,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:54,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:54,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:01:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:01:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:01:54,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364388048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:54,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:54,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-10-13 00:01:54,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037604256] [2021-10-13 00:01:54,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:01:54,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:54,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:01:54,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:01:54,711 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-10-13 00:01:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:54,874 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-10-13 00:01:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:01:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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 [2021-10-13 00:01:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:54,883 INFO L225 Difference]: With dead ends: 51 [2021-10-13 00:01:54,883 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 00:01:54,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:01:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 00:01:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-10-13 00:01:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-13 00:01:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-10-13 00:01:54,901 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-10-13 00:01:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:54,901 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-10-13 00:01:54,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-10-13 00:01:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-10-13 00:01:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 00:01:54,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:54,904 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:54,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:55,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-13 00:01:55,118 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:55,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-10-13 00:01:55,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:55,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812513783] [2021-10-13 00:01:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:55,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:01:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-13 00:01:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:01:55,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:55,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812513783] [2021-10-13 00:01:55,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812513783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:55,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412789305] [2021-10-13 00:01:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:55,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:55,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:55,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:55,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:01:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:01:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:01:55,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412789305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:55,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:55,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-10-13 00:01:55,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637057340] [2021-10-13 00:01:55,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:01:55,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:01:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:01:55,591 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-13 00:01:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:55,837 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-10-13 00:01:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:01:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) Word has length 36 [2021-10-13 00:01:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:55,840 INFO L225 Difference]: With dead ends: 105 [2021-10-13 00:01:55,840 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 00:01:55,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:01:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 00:01:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-13 00:01:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-10-13 00:01:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-10-13 00:01:55,854 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-10-13 00:01:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:55,854 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-10-13 00:01:55,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-13 00:01:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-10-13 00:01:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:01:55,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:55,857 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:55,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:56,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:56,067 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-10-13 00:01:56,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:56,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133326343] [2021-10-13 00:01:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:56,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:56,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:56,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:56,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:56,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:01:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:56,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:01:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:01:56,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:56,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133326343] [2021-10-13 00:01:56,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133326343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:56,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362773234] [2021-10-13 00:01:56,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:56,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:56,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:56,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:56,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:01:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:01:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:01:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362773234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:56,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:56,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-13 00:01:56,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244873746] [2021-10-13 00:01:56,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:01:56,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:01:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:01:56,437 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-13 00:01:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:56,784 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-10-13 00:01:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:01:56,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) Word has length 37 [2021-10-13 00:01:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:56,788 INFO L225 Difference]: With dead ends: 177 [2021-10-13 00:01:56,788 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 00:01:56,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:01:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 00:01:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-10-13 00:01:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-10-13 00:01:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-10-13 00:01:56,812 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-10-13 00:01:56,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:56,813 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-10-13 00:01:56,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-13 00:01:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-10-13 00:01:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:01:56,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:56,818 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:56,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:57,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:57,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-10-13 00:01:57,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:57,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919146536] [2021-10-13 00:01:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:57,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:01:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:01:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:01:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 00:01:57,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:57,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919146536] [2021-10-13 00:01:57,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919146536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:57,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892023970] [2021-10-13 00:01:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:57,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:57,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:57,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:01:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:01:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-13 00:01:57,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892023970] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:57,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:57,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-10-13 00:01:57,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091701589] [2021-10-13 00:01:57,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:01:57,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:57,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:01:57,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:01:57,530 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 00:01:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:57,806 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2021-10-13 00:01:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:01:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 51 [2021-10-13 00:01:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:57,810 INFO L225 Difference]: With dead ends: 262 [2021-10-13 00:01:57,810 INFO L226 Difference]: Without dead ends: 162 [2021-10-13 00:01:57,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:01:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-13 00:01:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2021-10-13 00:01:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2021-10-13 00:01:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2021-10-13 00:01:57,850 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2021-10-13 00:01:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:57,851 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2021-10-13 00:01:57,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 00:01:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2021-10-13 00:01:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:01:57,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:57,855 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:57,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:58,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-13 00:01:58,081 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1130362923, now seen corresponding path program 1 times [2021-10-13 00:01:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:58,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159960510] [2021-10-13 00:01:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:58,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:01:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:01:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:01:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:01:58,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:58,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159960510] [2021-10-13 00:01:58,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159960510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:58,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738437528] [2021-10-13 00:01:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:58,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:58,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:58,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:01:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:01:58,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-13 00:01:58,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738437528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:58,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:58,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2021-10-13 00:01:58,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791317649] [2021-10-13 00:01:58,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:01:58,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:01:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:01:58,598 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-10-13 00:01:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:58,868 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2021-10-13 00:01:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:01:58,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) Word has length 52 [2021-10-13 00:01:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:58,872 INFO L225 Difference]: With dead ends: 301 [2021-10-13 00:01:58,872 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 00:01:58,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:01:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 00:01:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-10-13 00:01:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2021-10-13 00:01:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2021-10-13 00:01:58,903 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2021-10-13 00:01:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:58,903 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2021-10-13 00:01:58,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-10-13 00:01:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2021-10-13 00:01:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-13 00:01:58,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:58,908 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:58,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:59,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:59,124 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1087717907, now seen corresponding path program 2 times [2021-10-13 00:01:59,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:01:59,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763150241] [2021-10-13 00:01:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:59,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:01:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:01:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:01:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:01:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:01:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:01:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:01:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:01:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-13 00:01:59,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:01:59,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763150241] [2021-10-13 00:01:59,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763150241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:59,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150993932] [2021-10-13 00:01:59,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:01:59,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:01:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:59,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:01:59,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:01:59,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:01:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:01:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:01:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-10-13 00:01:59,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150993932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:01:59,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:01:59,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2021-10-13 00:01:59,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677159893] [2021-10-13 00:01:59,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:01:59,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:01:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:01:59,825 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2021-10-13 00:02:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:00,229 INFO L93 Difference]: Finished difference Result 179 states and 304 transitions. [2021-10-13 00:02:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:02:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) Word has length 79 [2021-10-13 00:02:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:00,231 INFO L225 Difference]: With dead ends: 179 [2021-10-13 00:02:00,231 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 00:02:00,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:02:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 00:02:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-10-13 00:02:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (29), 17 states have call predecessors, (29), 14 states have call successors, (29) [2021-10-13 00:02:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2021-10-13 00:02:00,241 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 79 [2021-10-13 00:02:00,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:00,241 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2021-10-13 00:02:00,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2021-10-13 00:02:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2021-10-13 00:02:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-13 00:02:00,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:00,243 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:00,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:02:00,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:02:00,444 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:02:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash 780870354, now seen corresponding path program 1 times [2021-10-13 00:02:00,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:02:00,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850418850] [2021-10-13 00:02:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:00,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:02:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:02:00,457 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:02:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:02:00,493 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:02:00,493 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:02:00,494 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:02:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:02:00,503 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:02:00,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:02:00 BoogieIcfgContainer [2021-10-13 00:02:00,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:02:00,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:02:00,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:02:00,582 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:02:00,583 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:52" (3/4) ... [2021-10-13 00:02:00,585 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:02:00,679 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:02:00,679 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:02:00,681 INFO L168 Benchmark]: Toolchain (without parser) took 8439.35 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 60.2 MB in the beginning and 42.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 58.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:02:00,681 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 66.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:02:00,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.99 ms. Allocated memory is still 94.4 MB. Free memory was 60.0 MB in the beginning and 70.6 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:02:00,683 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.22 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:02:00,684 INFO L168 Benchmark]: Boogie Preprocessor took 17.27 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 68.1 MB in the end (delta: 950.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:02:00,684 INFO L168 Benchmark]: RCFGBuilder took 306.70 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 58.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:02:00,685 INFO L168 Benchmark]: TraceAbstraction took 7738.70 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 58.1 MB in the beginning and 47.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:02:00,685 INFO L168 Benchmark]: Witness Printer took 97.48 ms. Allocated memory is still 136.3 MB. Free memory was 46.0 MB in the beginning and 42.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:02:00,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 66.5 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.99 ms. Allocated memory is still 94.4 MB. Free memory was 60.0 MB in the beginning and 70.6 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.22 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.27 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 68.1 MB in the end (delta: 950.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 306.70 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 58.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7738.70 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 58.1 MB in the beginning and 47.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. * Witness Printer took 97.48 ms. Allocated memory is still 136.3 MB. Free memory was 46.0 MB in the beginning and 42.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 4; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 3 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7586.1ms, OverallIterations: 10, TraceHistogramMax: 6, EmptinessCheckTime: 34.2ms, AutomataDifference: 2000.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 247 SDtfs, 308 SDslu, 1378 SDs, 0 SdLazy, 2024 SolverSat, 271 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1024.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 516 GetRequests, 386 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 905.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 183.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 103.6ms SsaConstructionTime, 344.1ms SatisfiabilityAnalysisTime, 2618.9ms InterpolantComputationTime, 690 NumberOfCodeBlocks, 690 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 609 ConstructedInterpolants, 0 QuantifiedInterpolants, 1225 SizeOfPredicates, 19 NumberOfNonLiveVariables, 879 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 388/526 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! [2021-10-13 00:02:00,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e0789c-59ca-453a-b6b7-334fc544a2bf/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...