./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg --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 6597d5a31aa324ba443314d2c363b302cd71d697c12811ade53ae3225a095206 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:43:21,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:43:21,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:43:21,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:43:21,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:43:21,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:43:21,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:43:21,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:43:21,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:43:21,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:43:21,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:43:21,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:43:21,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:43:21,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:43:21,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:43:21,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:43:21,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:43:21,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:43:21,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:43:21,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:43:21,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:43:21,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:43:21,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:43:21,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:43:21,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:43:21,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:43:21,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:43:21,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:43:21,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:43:21,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:43:21,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:43:21,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:43:21,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:43:21,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:43:21,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:43:21,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:43:21,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:43:21,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:43:21,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:43:21,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:43:21,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:43:21,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:43:21,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:43:21,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:43:21,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:43:21,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:43:21,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:43:21,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:43:21,408 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:43:21,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:43:21,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:43:21,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:43:21,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:43:21,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:43:21,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:43:21,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:43:21,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:43:21,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:43:21,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:43:21,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:43:21,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:43:21,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:43:21,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:43:21,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:43:21,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:43:21,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:43:21,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:43:21,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:43:21,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:43:21,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:43:21,415 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:43:21,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:43:21,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:43:21,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:43:21,418 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_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6597d5a31aa324ba443314d2c363b302cd71d697c12811ade53ae3225a095206 [2021-10-28 08:43:21,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:43:21,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:43:21,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:43:21,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:43:21,743 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:43:21,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2021-10-28 08:43:21,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/data/a767fec21/7263abc3e9b1437dad35d03161f946ed/FLAG99b6c4ae1 [2021-10-28 08:43:22,326 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:43:22,326 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2021-10-28 08:43:22,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/data/a767fec21/7263abc3e9b1437dad35d03161f946ed/FLAG99b6c4ae1 [2021-10-28 08:43:22,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/data/a767fec21/7263abc3e9b1437dad35d03161f946ed [2021-10-28 08:43:22,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:43:22,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:43:22,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:43:22,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:43:22,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:43:22,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:22" (1/1) ... [2021-10-28 08:43:22,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1206aa45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:22, skipping insertion in model container [2021-10-28 08:43:22,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:22" (1/1) ... [2021-10-28 08:43:22,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:43:22,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:43:22,989 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_a9ed9189-471f-4abc-a344-23b53e6091d9/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c[946,959] [2021-10-28 08:43:22,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:43:23,010 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:43:23,034 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_a9ed9189-471f-4abc-a344-23b53e6091d9/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c[946,959] [2021-10-28 08:43:23,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:43:23,053 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:43:23,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23 WrapperNode [2021-10-28 08:43:23,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:43:23,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:43:23,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:43:23,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:43:23,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:43:23,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:43:23,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:43:23,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:43:23,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:43:23,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:43:23,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:43:23,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:43:23,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (1/1) ... [2021-10-28 08:43:23,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:43:23,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:23,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:43:23,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:43:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:43:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-10-28 08:43:23,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-10-28 08:43:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:43:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-10-28 08:43:23,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-10-28 08:43:23,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:43:23,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:43:23,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:43:23,513 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 08:43:23,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:23 BoogieIcfgContainer [2021-10-28 08:43:23,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:43:23,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:43:23,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:43:23,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:43:23,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:43:22" (1/3) ... [2021-10-28 08:43:23,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0dc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:23, skipping insertion in model container [2021-10-28 08:43:23,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:23" (2/3) ... [2021-10-28 08:43:23,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0dc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:23, skipping insertion in model container [2021-10-28 08:43:23,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:23" (3/3) ... [2021-10-28 08:43:23,524 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2021-10-28 08:43:23,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:43:23,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:43:23,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:43:23,610 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:43:23,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:43:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:43:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:43:23,665 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:23,666 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:23,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:43:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-10-28 08:43:23,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:23,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129989611] [2021-10-28 08:43:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:23,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:23,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:43:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:23,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:23,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129989611] [2021-10-28 08:43:23,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129989611] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:23,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:23,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:43:23,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969053064] [2021-10-28 08:43:23,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:23,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:24,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:24,012 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:43:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:24,102 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-10-28 08:43:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:43:24,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 08:43:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:24,115 INFO L225 Difference]: With dead ends: 39 [2021-10-28 08:43:24,115 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 08:43:24,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:43:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 08:43:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 08:43:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 08:43:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-28 08:43:24,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-10-28 08:43:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:24,172 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-28 08:43:24,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:43:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-10-28 08:43:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:43:24,175 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:24,175 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:24,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:43:24,176 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:43:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-10-28 08:43:24,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:24,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446341670] [2021-10-28 08:43:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:24,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:43:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:24,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:24,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446341670] [2021-10-28 08:43:24,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446341670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:24,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:24,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:43:24,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471636929] [2021-10-28 08:43:24,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:24,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:24,286 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:43:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:24,367 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-10-28 08:43:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:43:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 08:43:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:24,370 INFO L225 Difference]: With dead ends: 33 [2021-10-28 08:43:24,370 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 08:43:24,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:43:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 08:43:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-10-28 08:43:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 08:43:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-28 08:43:24,385 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-10-28 08:43:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:24,386 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-28 08:43:24,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:43:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-10-28 08:43:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 08:43:24,388 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:24,396 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:24,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:43:24,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:43:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-10-28 08:43:24,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:24,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523111639] [2021-10-28 08:43:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:24,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:43:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 08:43:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:43:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:43:24,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:24,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523111639] [2021-10-28 08:43:24,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523111639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:24,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458545116] [2021-10-28 08:43:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:24,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:24,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:24,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:24,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:43:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:43:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:43:24,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458545116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:24,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:43:24,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-28 08:43:24,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755507046] [2021-10-28 08:43:24,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:43:24,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:24,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:43:24,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:43:24,922 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 11 states, 8 states have (on average 3.25) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 08:43:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:25,108 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-10-28 08:43:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:43:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.25) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) Word has length 23 [2021-10-28 08:43:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:25,113 INFO L225 Difference]: With dead ends: 55 [2021-10-28 08:43:25,113 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 08:43:25,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:43:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 08:43:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-10-28 08:43:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 08:43:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-10-28 08:43:25,132 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-10-28 08:43:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:25,133 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-10-28 08:43:25,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.25) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 08:43:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-10-28 08:43:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:43:25,138 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:25,138 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:25,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:25,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:25,363 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:43:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-10-28 08:43:25,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:25,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287135857] [2021-10-28 08:43:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:25,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:25,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:43:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:25,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 08:43:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:25,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 08:43:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:43:25,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:25,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287135857] [2021-10-28 08:43:25,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287135857] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:25,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494618535] [2021-10-28 08:43:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:25,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:25,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:25,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:25,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:43:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:25,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:43:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:43:25,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494618535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:25,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:43:25,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 08:43:25,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315100812] [2021-10-28 08:43:25,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:43:25,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:43:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:43:25,983 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:43:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:26,038 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-10-28 08:43:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:43:26,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-10-28 08:43:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:26,043 INFO L225 Difference]: With dead ends: 43 [2021-10-28 08:43:26,043 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 08:43:26,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:43:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 08:43:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-10-28 08:43:26,058 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, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-28 08:43:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-10-28 08:43:26,064 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2021-10-28 08:43:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:26,065 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-10-28 08:43:26,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:43:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-10-28 08:43:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 08:43:26,069 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:26,069 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:26,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:26,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:26,283 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:43:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 988182601, now seen corresponding path program 1 times [2021-10-28 08:43:26,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:26,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174540596] [2021-10-28 08:43:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:26,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:26,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:43:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 08:43:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:26,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 08:43:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:43:26,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:26,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174540596] [2021-10-28 08:43:26,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174540596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:26,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303610741] [2021-10-28 08:43:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:26,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:26,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:26,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:43:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:43:26,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:43:26,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303610741] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:26,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:26,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-10-28 08:43:26,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981273501] [2021-10-28 08:43:26,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:43:26,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:26,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:43:26,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:43:26,657 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:43:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:26,763 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-10-28 08:43:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:43:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-10-28 08:43:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:26,768 INFO L225 Difference]: With dead ends: 41 [2021-10-28 08:43:26,768 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 08:43:26,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:43:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 08:43:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-10-28 08:43:26,776 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, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-28 08:43:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-10-28 08:43:26,777 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2021-10-28 08:43:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:26,778 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-10-28 08:43:26,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:43:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-10-28 08:43:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:43:26,779 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:26,780 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:26,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-28 08:43:26,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:26,983 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:43:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-10-28 08:43:26,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:26,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545166117] [2021-10-28 08:43:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:26,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:43:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 08:43:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 08:43:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 08:43:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 08:43:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:43:27,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:27,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545166117] [2021-10-28 08:43:27,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545166117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:27,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543149418] [2021-10-28 08:43:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:27,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:27,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:27,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:27,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:43:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:43:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:43:27,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543149418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:27,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:43:27,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-28 08:43:27,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689711073] [2021-10-28 08:43:27,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:43:27,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:43:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:43:27,423 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 13 states, 10 states have (on average 3.7) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 08:43:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:27,630 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2021-10-28 08:43:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:43:27,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.7) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) Word has length 36 [2021-10-28 08:43:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:27,631 INFO L225 Difference]: With dead ends: 66 [2021-10-28 08:43:27,632 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:43:27,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:43:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:43:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:43:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:43:27,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-10-28 08:43:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:27,636 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:43:27,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.7) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 08:43:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:43:27,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:43:27,639 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:43:27,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:27,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:27,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 08:43:27,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:43:27,980 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 08:43:27,981 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 08:43:27,981 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 08:43:27,981 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 08:43:27,981 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-10-28 08:43:27,982 INFO L853 garLoopResultBuilder]: At program point L43(lines 37 44) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2021-10-28 08:43:27,982 INFO L857 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2021-10-28 08:43:27,982 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-10-28 08:43:27,982 INFO L853 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2021-10-28 08:43:27,982 INFO L857 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-10-28 08:43:27,982 INFO L857 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2021-10-28 08:43:27,983 INFO L860 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-10-28 08:43:27,983 INFO L853 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-10-28 08:43:27,983 INFO L857 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-10-28 08:43:27,983 INFO L853 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-10-28 08:43:27,983 INFO L857 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-10-28 08:43:27,984 INFO L857 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2021-10-28 08:43:27,984 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2021-10-28 08:43:27,984 INFO L857 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2021-10-28 08:43:27,984 INFO L857 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2021-10-28 08:43:27,984 INFO L860 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-10-28 08:43:27,985 INFO L853 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2021-10-28 08:43:27,985 INFO L857 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-10-28 08:43:27,985 INFO L853 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (< 2 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret7| 1) (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) .cse0))) [2021-10-28 08:43:27,985 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2021-10-28 08:43:27,985 INFO L857 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-10-28 08:43:27,985 INFO L857 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2021-10-28 08:43:27,986 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2021-10-28 08:43:27,986 INFO L857 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2021-10-28 08:43:27,989 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-10-28 08:43:27,990 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:43:28,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:43:28 BoogieIcfgContainer [2021-10-28 08:43:28,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:43:28,003 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:43:28,003 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:43:28,003 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:43:28,003 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:23" (3/4) ... [2021-10-28 08:43:28,006 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:43:28,013 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2021-10-28 08:43:28,013 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2021-10-28 08:43:28,017 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 08:43:28,017 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:43:28,018 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:43:28,018 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:43:28,056 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:43:28,059 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:43:28,061 INFO L168 Benchmark]: Toolchain (without parser) took 5322.59 ms. Allocated memory was 88.1 MB in the beginning and 144.7 MB in the end (delta: 56.6 MB). Free memory was 54.4 MB in the beginning and 105.2 MB in the end (delta: -50.7 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:43:28,062 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 28.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:43:28,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.39 ms. Allocated memory was 88.1 MB in the beginning and 144.7 MB in the end (delta: 56.6 MB). Free memory was 54.2 MB in the beginning and 120.7 MB in the end (delta: -66.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:43:28,063 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.67 ms. Allocated memory is still 144.7 MB. Free memory was 120.7 MB in the beginning and 118.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:43:28,064 INFO L168 Benchmark]: Boogie Preprocessor took 44.86 ms. Allocated memory is still 144.7 MB. Free memory was 118.6 MB in the beginning and 118.1 MB in the end (delta: 464.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:43:28,064 INFO L168 Benchmark]: RCFGBuilder took 373.80 ms. Allocated memory is still 144.7 MB. Free memory was 118.1 MB in the beginning and 108.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:43:28,064 INFO L168 Benchmark]: TraceAbstraction took 4485.22 ms. Allocated memory is still 144.7 MB. Free memory was 107.6 MB in the beginning and 108.3 MB in the end (delta: -700.5 kB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:43:28,065 INFO L168 Benchmark]: Witness Printer took 56.69 ms. Allocated memory is still 144.7 MB. Free memory was 108.3 MB in the beginning and 105.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:43:28,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 28.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.39 ms. Allocated memory was 88.1 MB in the beginning and 144.7 MB in the end (delta: 56.6 MB). Free memory was 54.2 MB in the beginning and 120.7 MB in the end (delta: -66.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.67 ms. Allocated memory is still 144.7 MB. Free memory was 120.7 MB in the beginning and 118.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.86 ms. Allocated memory is still 144.7 MB. Free memory was 118.6 MB in the beginning and 118.1 MB in the end (delta: 464.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 373.80 ms. Allocated memory is still 144.7 MB. Free memory was 118.1 MB in the beginning and 108.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4485.22 ms. Allocated memory is still 144.7 MB. Free memory was 107.6 MB in the beginning and 108.3 MB in the end (delta: -700.5 kB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. * Witness Printer took 56.69 ms. Allocated memory is still 144.7 MB. Free memory was 108.3 MB in the beginning and 105.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 87 SDslu, 678 SDs, 0 SdLazy, 505 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 47 PreInvPairs, 57 NumberOfFragments, 50 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 227 ConstructedInterpolants, 0 QuantifiedInterpolants, 525 SizeOfPredicates, 7 NumberOfNonLiveVariables, 355 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 36/58 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: x == 2 RESULT: Ultimate proved your program to be correct! [2021-10-28 08:43:28,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ed9189-471f-4abc-a344-23b53e6091d9/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...