./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-2.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_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/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_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/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_a860c7f3-2f6b-477f-b827-52771cf142b8/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 b2c28e4a28eb31322d66c263b5716511ec5353f2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:39:24,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:39:24,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:39:24,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:39:24,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:39:24,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:39:24,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:39:24,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:39:24,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:39:24,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:39:24,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:39:24,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:39:24,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:39:24,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:39:24,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:39:24,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:39:24,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:39:24,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:39:24,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:39:24,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:39:24,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:39:24,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:39:24,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:39:24,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:39:24,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:39:25,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:39:25,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:39:25,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:39:25,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:39:25,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:39:25,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:39:25,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:39:25,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:39:25,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:39:25,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:39:25,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:39:25,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:39:25,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:39:25,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:39:25,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:39:25,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:39:25,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:39:25,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:39:25,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:39:25,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:39:25,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:39:25,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:39:25,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:39:25,068 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:39:25,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:39:25,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:39:25,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:39:25,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:39:25,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:39:25,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:39:25,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:39:25,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:39:25,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:39:25,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:39:25,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:39:25,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:39:25,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:39:25,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:39:25,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:39:25,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:39:25,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:39:25,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:39:25,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:39:25,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:39:25,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:39:25,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:39:25,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:39:25,074 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_a860c7f3-2f6b-477f-b827-52771cf142b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2c28e4a28eb31322d66c263b5716511ec5353f2 [2021-10-13 00:39:25,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:39:25,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:39:25,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:39:25,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:39:25,449 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:39:25,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-10-13 00:39:25,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/data/457518df8/a061f4d149b14edfbdbd257ba4e72bf9/FLAG131580b7e [2021-10-13 00:39:26,070 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:39:26,071 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-10-13 00:39:26,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/data/457518df8/a061f4d149b14edfbdbd257ba4e72bf9/FLAG131580b7e [2021-10-13 00:39:26,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/data/457518df8/a061f4d149b14edfbdbd257ba4e72bf9 [2021-10-13 00:39:26,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:39:26,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:39:26,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:39:26,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:39:26,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:39:26,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d019431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26, skipping insertion in model container [2021-10-13 00:39:26,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:39:26,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:39:26,644 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_a860c7f3-2f6b-477f-b827-52771cf142b8/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-10-13 00:39:26,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:39:26,673 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:39:26,697 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_a860c7f3-2f6b-477f-b827-52771cf142b8/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-10-13 00:39:26,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:39:26,714 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:39:26,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26 WrapperNode [2021-10-13 00:39:26,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:39:26,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:39:26,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:39:26,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:39:26,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:39:26,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:39:26,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:39:26,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:39:26,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:39:26,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:39:26,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:39:26,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:39:26,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (1/1) ... [2021-10-13 00:39:26,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:39:26,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:26,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:39:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:39:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:39:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:39:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:39:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:39:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-10-13 00:39:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-10-13 00:39:27,130 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:39:27,131 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 00:39:27,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:39:27 BoogieIcfgContainer [2021-10-13 00:39:27,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:39:27,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:39:27,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:39:27,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:39:27,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:39:26" (1/3) ... [2021-10-13 00:39:27,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fba37b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:39:27, skipping insertion in model container [2021-10-13 00:39:27,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:39:26" (2/3) ... [2021-10-13 00:39:27,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fba37b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:39:27, skipping insertion in model container [2021-10-13 00:39:27,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:39:27" (3/3) ... [2021-10-13 00:39:27,155 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2021-10-13 00:39:27,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:39:27,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:39:27,258 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:39:27,277 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 00:39:27,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:39:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:39:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:39:27,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:27,314 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:27,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2021-10-13 00:39:27,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:27,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663840959] [2021-10-13 00:39:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:27,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:27,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:27,633 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 00:39:27,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:27,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663840959] [2021-10-13 00:39:27,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663840959] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:39:27,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:39:27,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:39:27,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278847869] [2021-10-13 00:39:27,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:39:27,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:39:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:39:27,660 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 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 00:39:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:27,709 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-10-13 00:39:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:39:27,711 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 00:39:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:27,721 INFO L225 Difference]: With dead ends: 34 [2021-10-13 00:39:27,722 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 00:39:27,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:39:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 00:39:27,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 00:39:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:39:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-10-13 00:39:27,770 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-10-13 00:39:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:27,770 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-10-13 00:39:27,771 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 00:39:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-10-13 00:39:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:39:27,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:27,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:27,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:39:27,774 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2021-10-13 00:39:27,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:27,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401212300] [2021-10-13 00:39:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:27,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:27,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:27,854 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 00:39:27,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:27,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401212300] [2021-10-13 00:39:27,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401212300] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:39:27,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:39:27,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:39:27,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649317264] [2021-10-13 00:39:27,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:39:27,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:27,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:39:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:39:27,860 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 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 00:39:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:27,895 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-10-13 00:39:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:39:27,896 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 00:39:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:27,897 INFO L225 Difference]: With dead ends: 24 [2021-10-13 00:39:27,897 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 00:39:27,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:39:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 00:39:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-10-13 00:39:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:39:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-10-13 00:39:27,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-10-13 00:39:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:27,910 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-10-13 00:39:27,910 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 00:39:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-10-13 00:39:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:39:27,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:27,912 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:27,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:39:27,913 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:27,914 INFO L82 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2021-10-13 00:39:27,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:27,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951960569] [2021-10-13 00:39:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:27,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:27,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 00:39:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:39:28,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:28,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951960569] [2021-10-13 00:39:28,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951960569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:28,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670812972] [2021-10-13 00:39:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:28,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:28,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:28,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:39:28,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:39:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:39:28,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:39:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:39:28,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670812972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:28,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:39:28,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-13 00:39:28,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578593929] [2021-10-13 00:39:28,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:39:28,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:39:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:39:28,387 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 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 00:39:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:28,525 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-10-13 00:39:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:39:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 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 00:39:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:28,529 INFO L225 Difference]: With dead ends: 35 [2021-10-13 00:39:28,529 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 00:39:28,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:39:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 00:39:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-13 00:39:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-13 00:39:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-13 00:39:28,549 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2021-10-13 00:39:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:28,550 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-13 00:39:28,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 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 00:39:28,553 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-13 00:39:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:39:28,555 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:28,556 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:28,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:39:28,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:28,775 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:28,776 INFO L82 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2021-10-13 00:39:28,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:28,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318302482] [2021-10-13 00:39:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:28,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:39:28,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:28,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318302482] [2021-10-13 00:39:28,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318302482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:28,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987929759] [2021-10-13 00:39:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:28,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:28,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:39:28,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:39:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:29,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:39:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:39:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:39:29,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987929759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:29,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:39:29,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-13 00:39:29,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770866798] [2021-10-13 00:39:29,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:39:29,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:39:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:39:29,177 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:39:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:29,284 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-10-13 00:39:29,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:39:29,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2021-10-13 00:39:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:29,292 INFO L225 Difference]: With dead ends: 38 [2021-10-13 00:39:29,292 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 00:39:29,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:39:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 00:39:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-13 00:39:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-10-13 00:39:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2021-10-13 00:39:29,316 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2021-10-13 00:39:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:29,316 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2021-10-13 00:39:29,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 00:39:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2021-10-13 00:39:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:39:29,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:29,321 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:29,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:39:29,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:29,522 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2021-10-13 00:39:29,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:29,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118836339] [2021-10-13 00:39:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:29,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:29,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:29,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:29,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:29,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 00:39:29,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:29,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118836339] [2021-10-13 00:39:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118836339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:29,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133008181] [2021-10-13 00:39:29,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:39:29,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:29,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:29,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:39:29,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:39:29,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:39:29,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:39:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:39:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:39:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-13 00:39:30,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133008181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:30,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:39:30,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-13 00:39:30,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321588649] [2021-10-13 00:39:30,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:39:30,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:39:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:39:30,049 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-13 00:39:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:30,300 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2021-10-13 00:39:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:39:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 37 [2021-10-13 00:39:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:30,303 INFO L225 Difference]: With dead ends: 69 [2021-10-13 00:39:30,303 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 00:39:30,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:39:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 00:39:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 00:39:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-10-13 00:39:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-10-13 00:39:30,312 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2021-10-13 00:39:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:30,313 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-10-13 00:39:30,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-13 00:39:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-10-13 00:39:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-13 00:39:30,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:30,330 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:30,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:39:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:30,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:30,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2015531204, now seen corresponding path program 3 times [2021-10-13 00:39:30,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:30,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654756907] [2021-10-13 00:39:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:30,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-10-13 00:39:30,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:30,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654756907] [2021-10-13 00:39:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654756907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:30,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985194448] [2021-10-13 00:39:30,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:39:30,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:30,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:30,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:39:30,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:39:30,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 00:39:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:39:30,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:39:30,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:39:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-13 00:39:31,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985194448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:31,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:39:31,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 13 [2021-10-13 00:39:31,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043831262] [2021-10-13 00:39:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:39:31,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:39:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:39:31,141 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-13 00:39:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:31,311 INFO L93 Difference]: Finished difference Result 85 states and 124 transitions. [2021-10-13 00:39:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:39:31,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 65 [2021-10-13 00:39:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:31,319 INFO L225 Difference]: With dead ends: 85 [2021-10-13 00:39:31,320 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 00:39:31,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:39:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 00:39:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-10-13 00:39:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2021-10-13 00:39:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-10-13 00:39:31,362 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 65 [2021-10-13 00:39:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:31,363 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-10-13 00:39:31,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-13 00:39:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-10-13 00:39:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-13 00:39:31,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:31,367 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:31,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:39:31,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 00:39:31,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1033750100, now seen corresponding path program 4 times [2021-10-13 00:39:31,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:31,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193212674] [2021-10-13 00:39:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:31,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:31,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-13 00:39:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-13 00:39:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 57 proven. 377 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-10-13 00:39:32,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:32,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193212674] [2021-10-13 00:39:32,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193212674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:32,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857985149] [2021-10-13 00:39:32,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:39:32,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:32,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:32,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:39:32,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:39:32,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:39:32,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:39:32,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:39:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:39:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 57 proven. 377 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-10-13 00:39:32,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857985149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:32,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:39:32,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-10-13 00:39:32,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916381502] [2021-10-13 00:39:32,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:39:32,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:39:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:39:32,717 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (19), 10 states have call predecessors, (19), 12 states have call successors, (19) [2021-10-13 00:39:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:32,912 INFO L93 Difference]: Finished difference Result 117 states and 176 transitions. [2021-10-13 00:39:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:39:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (19), 10 states have call predecessors, (19), 12 states have call successors, (19) Word has length 147 [2021-10-13 00:39:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:32,918 INFO L225 Difference]: With dead ends: 117 [2021-10-13 00:39:32,918 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 00:39:32,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:39:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 00:39:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2021-10-13 00:39:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 68 states have internal predecessors, (82), 21 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (56), 26 states have call predecessors, (56), 21 states have call successors, (56) [2021-10-13 00:39:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 159 transitions. [2021-10-13 00:39:32,945 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 159 transitions. Word has length 147 [2021-10-13 00:39:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:32,947 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 159 transitions. [2021-10-13 00:39:32,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (19), 10 states have call predecessors, (19), 12 states have call successors, (19) [2021-10-13 00:39:32,947 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 159 transitions. [2021-10-13 00:39:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-10-13 00:39:32,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:32,953 INFO L512 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:32,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:39:33,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:33,166 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1022210831, now seen corresponding path program 5 times [2021-10-13 00:39:33,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:33,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309014131] [2021-10-13 00:39:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:33,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-13 00:39:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-10-13 00:39:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-13 00:39:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 403 proven. 706 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2021-10-13 00:39:33,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:33,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309014131] [2021-10-13 00:39:33,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309014131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:33,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932491664] [2021-10-13 00:39:33,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:39:33,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:33,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:39:33,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:39:34,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-13 00:39:34,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:39:34,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:39:34,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:39:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 630 proven. 571 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2021-10-13 00:39:34,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932491664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:34,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:39:34,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 25 [2021-10-13 00:39:34,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653764546] [2021-10-13 00:39:34,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 00:39:34,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 00:39:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:39:34,902 INFO L87 Difference]: Start difference. First operand 104 states and 159 transitions. Second operand has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 25 states have internal predecessors, (64), 17 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2021-10-13 00:39:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:35,515 INFO L93 Difference]: Finished difference Result 193 states and 365 transitions. [2021-10-13 00:39:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:39:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 25 states have internal predecessors, (64), 17 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) Word has length 215 [2021-10-13 00:39:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:35,520 INFO L225 Difference]: With dead ends: 193 [2021-10-13 00:39:35,520 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 00:39:35,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=388, Invalid=1418, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 00:39:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 00:39:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2021-10-13 00:39:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 15 states have call successors, (15), 12 states have call predecessors, (15), 8 states have return successors, (36), 13 states have call predecessors, (36), 15 states have call successors, (36) [2021-10-13 00:39:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 113 transitions. [2021-10-13 00:39:35,537 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 113 transitions. Word has length 215 [2021-10-13 00:39:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:35,538 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 113 transitions. [2021-10-13 00:39:35,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 25 states have internal predecessors, (64), 17 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2021-10-13 00:39:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 113 transitions. [2021-10-13 00:39:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-10-13 00:39:35,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:35,566 INFO L512 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:35,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:39:35,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:35,794 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1843553927, now seen corresponding path program 6 times [2021-10-13 00:39:35,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:35,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495482039] [2021-10-13 00:39:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:35,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:35,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:39:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-13 00:39:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-10-13 00:39:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-10-13 00:39:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-10-13 00:39:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-10-13 00:39:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:39:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-13 00:39:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-13 00:39:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-13 00:39:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:39:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 844 proven. 1612 refuted. 0 times theorem prover too weak. 4664 trivial. 0 not checked. [2021-10-13 00:39:36,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:39:36,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495482039] [2021-10-13 00:39:36,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495482039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:36,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489993771] [2021-10-13 00:39:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:39:36,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:39:36,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:39:36,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:39:37,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-10-13 00:39:37,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:39:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:39:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:39:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 1045 proven. 197 refuted. 0 times theorem prover too weak. 5878 trivial. 0 not checked. [2021-10-13 00:39:38,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489993771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:39:38,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:39:38,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 27 [2021-10-13 00:39:38,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254281834] [2021-10-13 00:39:38,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:39:38,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:39:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:39:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:39:38,278 INFO L87 Difference]: Start difference. First operand 84 states and 113 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 14 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (30), 23 states have call predecessors, (30), 14 states have call successors, (30) [2021-10-13 00:39:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:39:38,998 INFO L93 Difference]: Finished difference Result 214 states and 375 transitions. [2021-10-13 00:39:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 00:39:38,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 14 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (30), 23 states have call predecessors, (30), 14 states have call successors, (30) Word has length 351 [2021-10-13 00:39:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:39:39,002 INFO L225 Difference]: With dead ends: 214 [2021-10-13 00:39:39,002 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 00:39:39,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1872, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 00:39:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 00:39:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-10-13 00:39:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 71 states have internal predecessors, (76), 20 states have call successors, (20), 16 states have call predecessors, (20), 8 states have return successors, (38), 14 states have call predecessors, (38), 20 states have call successors, (38) [2021-10-13 00:39:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2021-10-13 00:39:39,021 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 351 [2021-10-13 00:39:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:39:39,022 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2021-10-13 00:39:39,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 14 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (30), 23 states have call predecessors, (30), 14 states have call successors, (30) [2021-10-13 00:39:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2021-10-13 00:39:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-10-13 00:39:39,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:39:39,028 INFO L512 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:39:39,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:39:39,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:39:39,248 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:39:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:39:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1099173212, now seen corresponding path program 7 times [2021-10-13 00:39:39,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:39:39,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102931631] [2021-10-13 00:39:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:39:39,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:39:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:39:39,300 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:39:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:39:39,437 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:39:39,438 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:39:39,439 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:39:39,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:39:39,453 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:39:39,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:39:39 BoogieIcfgContainer [2021-10-13 00:39:39,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:39:39,625 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:39:39,625 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:39:39,625 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:39:39,626 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:39:27" (3/4) ... [2021-10-13 00:39:39,636 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:39:39,791 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:39:39,791 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:39:39,793 INFO L168 Benchmark]: Toolchain (without parser) took 13370.17 ms. Allocated memory was 100.7 MB in the beginning and 207.6 MB in the end (delta: 107.0 MB). Free memory was 62.2 MB in the beginning and 151.6 MB in the end (delta: -89.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:39:39,793 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 78.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:39:39,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.45 ms. Allocated memory is still 100.7 MB. Free memory was 62.0 MB in the beginning and 52.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:39:39,794 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.02 ms. Allocated memory is still 100.7 MB. Free memory was 52.7 MB in the beginning and 51.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:39:39,795 INFO L168 Benchmark]: Boogie Preprocessor took 42.64 ms. Allocated memory is still 100.7 MB. Free memory was 51.4 MB in the beginning and 50.5 MB in the end (delta: 958.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:39:39,795 INFO L168 Benchmark]: RCFGBuilder took 327.32 ms. Allocated memory was 100.7 MB in the beginning and 140.5 MB in the end (delta: 39.8 MB). Free memory was 50.5 MB in the beginning and 110.4 MB in the end (delta: -59.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:39:39,796 INFO L168 Benchmark]: TraceAbstraction took 12488.84 ms. Allocated memory was 140.5 MB in the beginning and 207.6 MB in the end (delta: 67.1 MB). Free memory was 110.4 MB in the beginning and 164.2 MB in the end (delta: -53.8 MB). Peak memory consumption was 116.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:39:39,796 INFO L168 Benchmark]: Witness Printer took 166.31 ms. Allocated memory is still 207.6 MB. Free memory was 164.2 MB in the beginning and 151.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:39:39,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 78.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.45 ms. Allocated memory is still 100.7 MB. Free memory was 62.0 MB in the beginning and 52.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.02 ms. Allocated memory is still 100.7 MB. Free memory was 52.7 MB in the beginning and 51.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.64 ms. Allocated memory is still 100.7 MB. Free memory was 51.4 MB in the beginning and 50.5 MB in the end (delta: 958.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 327.32 ms. Allocated memory was 100.7 MB in the beginning and 140.5 MB in the end (delta: 39.8 MB). Free memory was 50.5 MB in the beginning and 110.4 MB in the end (delta: -59.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12488.84 ms. Allocated memory was 140.5 MB in the beginning and 207.6 MB in the end (delta: 67.1 MB). Free memory was 110.4 MB in the beginning and 164.2 MB in the end (delta: -53.8 MB). Peak memory consumption was 116.4 MB. Max. memory is 16.1 GB. * Witness Printer took 166.31 ms. Allocated memory is still 207.6 MB. Free memory was 164.2 MB in the beginning and 151.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 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: 29]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int x = 7; [L27] CALL, EXPR fibo(x) VAL [\old(n)=7] [L8] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L10] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=6, fibo(n-1)=5, n=6] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=6, fibo(n-1)=5, fibo(n-2)=3, n=6] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=7, fibo(n-1)=8, n=7] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=7, fibo(n-1)=8, fibo(n-2)=5, n=7] [L13] return fibo(n-1) + fibo(n-2); [L27] RET, EXPR fibo(x) [L27] int result = fibo(x); [L28] COND TRUE result == 13 [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12190.1ms, OverallIterations: 10, TraceHistogramMax: 51, EmptinessCheckTime: 76.9ms, AutomataDifference: 2379.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 179 SDtfs, 521 SDslu, 598 SDs, 0 SdLazy, 1343 SolverSat, 598 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1081.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1262 GetRequests, 1104 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1427.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=7, InterpolantAutomatonStates: 132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 175.3ms AutomataMinimizationTime, 9 MinimizatonAttempts, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 136.5ms SsaConstructionTime, 692.3ms SatisfiabilityAnalysisTime, 6101.2ms InterpolantComputationTime, 2028 NumberOfCodeBlocks, 1930 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1729 ConstructedInterpolants, 0 QuantifiedInterpolants, 2857 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1833 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 18235/22234 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 00:39:39,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a860c7f3-2f6b-477f-b827-52771cf142b8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...