./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD --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 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:49:22,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:49:22,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:49:22,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:49:22,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:49:22,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:49:22,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:49:22,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:49:22,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:49:22,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:49:22,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:49:22,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:49:22,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:49:22,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:49:22,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:49:22,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:49:22,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:49:22,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:49:22,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:49:23,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:49:23,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:49:23,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:49:23,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:49:23,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:49:23,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:49:23,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:49:23,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:49:23,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:49:23,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:49:23,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:49:23,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:49:23,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:49:23,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:49:23,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:49:23,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:49:23,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:49:23,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:49:23,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:49:23,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:49:23,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:49:23,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:49:23,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 22:49:23,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:49:23,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:49:23,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:49:23,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:49:23,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:49:23,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:49:23,089 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:49:23,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:49:23,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:49:23,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:49:23,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:49:23,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:49:23,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 22:49:23,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:49:23,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 22:49:23,090 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:49:23,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 22:49:23,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:49:23,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 22:49:23,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:49:23,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:49:23,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:49:23,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:49:23,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:49:23,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:49:23,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 22:49:23,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:49:23,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:49:23,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 22:49:23,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 22:49:23,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 22:49:23,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:49:23,094 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_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f [2021-10-28 22:49:23,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:49:23,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:49:23,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:49:23,403 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:49:23,404 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:49:23,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2021-10-28 22:49:23,513 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/data/21ccfd347/776b2bf4189940a1bac60c4b4ec26870/FLAG2a59ab227 [2021-10-28 22:49:23,944 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:49:23,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2021-10-28 22:49:23,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/data/21ccfd347/776b2bf4189940a1bac60c4b4ec26870/FLAG2a59ab227 [2021-10-28 22:49:24,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/data/21ccfd347/776b2bf4189940a1bac60c4b4ec26870 [2021-10-28 22:49:24,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:49:24,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 22:49:24,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:49:24,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:49:24,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:49:24,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf99299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24, skipping insertion in model container [2021-10-28 22:49:24,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:49:24,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:49:24,548 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_3df7efe5-6bc4-41ff-bd12-40c2824b916e/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c[946,959] [2021-10-28 22:49:24,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:49:24,560 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:49:24,575 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_3df7efe5-6bc4-41ff-bd12-40c2824b916e/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c[946,959] [2021-10-28 22:49:24,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:49:24,589 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:49:24,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24 WrapperNode [2021-10-28 22:49:24,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:49:24,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 22:49:24,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 22:49:24,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 22:49:24,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 22:49:24,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:49:24,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:49:24,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:49:24,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:49:24,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:49:24,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:49:24,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:49:24,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:49:24,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:24,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:49:24,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:49:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:49:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-10-28 22:49:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-10-28 22:49:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:49:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-10-28 22:49:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-10-28 22:49:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:49:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:49:25,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:49:25,026 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 22:49:25,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:25 BoogieIcfgContainer [2021-10-28 22:49:25,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:49:25,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:49:25,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:49:25,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:49:25,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:49:24" (1/3) ... [2021-10-28 22:49:25,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533c517f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:49:25, skipping insertion in model container [2021-10-28 22:49:25,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24" (2/3) ... [2021-10-28 22:49:25,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533c517f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:49:25, skipping insertion in model container [2021-10-28 22:49:25,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:25" (3/3) ... [2021-10-28 22:49:25,056 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2021-10-28 22:49:25,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:49:25,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 22:49:25,132 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:49:25,144 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 22:49:25,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 22:49:25,168 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 22:49:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 22:49:25,174 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:25,174 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:25,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-10-28 22:49:25,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:25,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684014566] [2021-10-28 22:49:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:25,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,552 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 22:49:25,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:25,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684014566] [2021-10-28 22:49:25,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684014566] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:25,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:25,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:49:25,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702203168] [2021-10-28 22:49:25,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:49:25,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:49:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:49:25,593 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:25,653 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-10-28 22:49:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:49:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 22:49:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:25,666 INFO L225 Difference]: With dead ends: 43 [2021-10-28 22:49:25,666 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 22:49:25,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:49:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 22:49:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 22:49:25,720 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 22:49:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-28 22:49:25,725 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-10-28 22:49:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:25,726 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-28 22:49:25,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-10-28 22:49:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:49:25,730 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:25,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:25,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:49:25,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-10-28 22:49:25,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:25,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345821415] [2021-10-28 22:49:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:25,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,852 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 22:49:25,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:25,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345821415] [2021-10-28 22:49:25,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345821415] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:25,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:25,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:49:25,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053845518] [2021-10-28 22:49:25,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:49:25,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:49:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:49:25,857 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:25,874 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-10-28 22:49:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:49:25,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:49:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:25,877 INFO L225 Difference]: With dead ends: 33 [2021-10-28 22:49:25,877 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 22:49:25,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:49:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 22:49:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-10-28 22:49:25,884 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 22:49:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-28 22:49:25,885 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-10-28 22:49:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:25,886 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-28 22:49:25,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-10-28 22:49:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 22:49:25,888 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:25,888 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 22:49:25,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:49:25,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-10-28 22:49:25,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:25,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144974574] [2021-10-28 22:49:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:25,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 22:49:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:25,996 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 22:49:25,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:25,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144974574] [2021-10-28 22:49:25,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144974574] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:25,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537735985] [2021-10-28 22:49:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:25,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:25,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:26,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:26,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:49:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:49:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:26,373 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 22:49:26,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537735985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:26,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:26,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-10-28 22:49:26,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852970477] [2021-10-28 22:49:26,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:49:26,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:26,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:49:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:49:26,379 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 22:49:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:26,613 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-10-28 22:49:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:49:26,614 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) Word has length 23 [2021-10-28 22:49:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:26,619 INFO L225 Difference]: With dead ends: 55 [2021-10-28 22:49:26,619 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 22:49:26,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:49:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 22:49:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-10-28 22:49:26,628 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 22:49:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-10-28 22:49:26,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-10-28 22:49:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:26,630 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-10-28 22:49:26,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 22:49:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-10-28 22:49:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:49:26,633 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:26,633 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 22:49:26,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:26,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:26,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-10-28 22:49:26,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:26,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921067309] [2021-10-28 22:49:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:26,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 22:49:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,998 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 22:49:26,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:26,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921067309] [2021-10-28 22:49:27,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921067309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:27,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241427247] [2021-10-28 22:49:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:27,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:27,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:27,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:27,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:49:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:49:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:27,227 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 22:49:27,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241427247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:27,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:27,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-10-28 22:49:27,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731203132] [2021-10-28 22:49:27,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:49:27,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:27,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:49:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:49:27,233 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:49:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:27,411 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-10-28 22:49:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:49:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2021-10-28 22:49:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:27,415 INFO L225 Difference]: With dead ends: 51 [2021-10-28 22:49:27,415 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 22:49:27,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:49:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 22:49:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-10-28 22:49:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 22:49:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-10-28 22:49:27,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-10-28 22:49:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:27,429 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-10-28 22:49:27,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:49:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-10-28 22:49:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:49:27,432 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:27,432 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 22:49:27,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:27,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:27,648 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-10-28 22:49:27,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:27,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329037191] [2021-10-28 22:49:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:27,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 22:49:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 22:49:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,843 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 22:49:27,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:27,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329037191] [2021-10-28 22:49:27,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329037191] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:27,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148160380] [2021-10-28 22:49:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:27,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:27,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:27,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:49:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:49:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 22:49:28,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148160380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:28,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:28,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-10-28 22:49:28,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871877857] [2021-10-28 22:49:28,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:49:28,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:49:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:49:28,127 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 22:49:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:28,376 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-10-28 22:49:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:49:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) Word has length 36 [2021-10-28 22:49:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:28,407 INFO L225 Difference]: With dead ends: 105 [2021-10-28 22:49:28,408 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 22:49:28,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:49:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 22:49:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 22:49:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-10-28 22:49:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-10-28 22:49:28,441 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-10-28 22:49:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:28,442 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-10-28 22:49:28,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 22:49:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-10-28 22:49:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 22:49:28,450 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:28,451 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, 1] [2021-10-28 22:49:28,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:28,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:28,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-10-28 22:49:28,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:28,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583841949] [2021-10-28 22:49:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:28,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 22:49:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 22:49:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 22:49:28,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:28,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583841949] [2021-10-28 22:49:28,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583841949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:28,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473425328] [2021-10-28 22:49:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:28,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:28,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:28,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:28,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:49:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:49:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:49:29,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473425328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:29,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:29,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-28 22:49:29,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283325419] [2021-10-28 22:49:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 22:49:29,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 22:49:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:49:29,131 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 22:49:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:29,474 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-10-28 22:49:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:49:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) Word has length 37 [2021-10-28 22:49:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:29,478 INFO L225 Difference]: With dead ends: 177 [2021-10-28 22:49:29,478 INFO L226 Difference]: Without dead ends: 117 [2021-10-28 22:49:29,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-10-28 22:49:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-28 22:49:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-10-28 22:49:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-10-28 22:49:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-10-28 22:49:29,504 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-10-28 22:49:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:29,504 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-10-28 22:49:29,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 22:49:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-10-28 22:49:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:49:29,508 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:29,508 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:29,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:29,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:29,727 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-10-28 22:49:29,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:29,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597880122] [2021-10-28 22:49:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:29,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 22:49:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 22:49:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:49:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 22:49:29,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:29,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597880122] [2021-10-28 22:49:29,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597880122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:29,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745398934] [2021-10-28 22:49:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:29,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:29,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:29,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:29,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:49:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:49:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 22:49:30,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745398934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:30,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:30,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-10-28 22:49:30,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952325814] [2021-10-28 22:49:30,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:49:30,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:49:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:49:30,210 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 22:49:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:30,509 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2021-10-28 22:49:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:49:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 51 [2021-10-28 22:49:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:30,516 INFO L225 Difference]: With dead ends: 262 [2021-10-28 22:49:30,516 INFO L226 Difference]: Without dead ends: 162 [2021-10-28 22:49:30,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:49:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-28 22:49:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2021-10-28 22:49:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2021-10-28 22:49:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2021-10-28 22:49:30,582 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2021-10-28 22:49:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:30,582 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2021-10-28 22:49:30,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 22:49:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2021-10-28 22:49:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 22:49:30,592 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:30,593 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:30,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:30,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 22:49:30,796 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1130362923, now seen corresponding path program 1 times [2021-10-28 22:49:30,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:30,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986164435] [2021-10-28 22:49:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:30,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 22:49:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 22:49:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-28 22:49:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 22:49:30,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:30,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986164435] [2021-10-28 22:49:30,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986164435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:30,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862240437] [2021-10-28 22:49:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:30,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:30,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:30,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:30,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:49:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:49:31,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-28 22:49:31,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862240437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:31,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:31,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2021-10-28 22:49:31,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518049067] [2021-10-28 22:49:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:49:31,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:49:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:49:31,248 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-10-28 22:49:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:31,583 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2021-10-28 22:49:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:49:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) Word has length 52 [2021-10-28 22:49:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:31,587 INFO L225 Difference]: With dead ends: 301 [2021-10-28 22:49:31,587 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 22:49:31,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:49:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 22:49:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-10-28 22:49:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2021-10-28 22:49:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2021-10-28 22:49:31,619 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2021-10-28 22:49:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:31,619 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2021-10-28 22:49:31,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-10-28 22:49:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2021-10-28 22:49:31,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 22:49:31,622 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:31,622 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:31,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:31,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 22:49:31,823 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:31,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1087717907, now seen corresponding path program 2 times [2021-10-28 22:49:31,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:31,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028225183] [2021-10-28 22:49:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:31,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 22:49:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 22:49:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 22:49:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-28 22:49:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:32,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:32,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 22:49:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:32,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 22:49:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:32,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 22:49:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-28 22:49:32,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:32,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028225183] [2021-10-28 22:49:32,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028225183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:32,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634407590] [2021-10-28 22:49:32,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:49:32,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:32,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:32,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:49:32,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:49:32,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:49:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 22:49:32,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-10-28 22:49:32,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634407590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:32,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:32,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2021-10-28 22:49:32,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571382241] [2021-10-28 22:49:32,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 22:49:32,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 22:49:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:49:32,516 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2021-10-28 22:49:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:32,970 INFO L93 Difference]: Finished difference Result 179 states and 304 transitions. [2021-10-28 22:49:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 22:49:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) Word has length 79 [2021-10-28 22:49:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:32,973 INFO L225 Difference]: With dead ends: 179 [2021-10-28 22:49:32,973 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 22:49:32,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-10-28 22:49:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 22:49:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-10-28 22:49:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (29), 17 states have call predecessors, (29), 14 states have call successors, (29) [2021-10-28 22:49:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2021-10-28 22:49:32,983 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 79 [2021-10-28 22:49:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:32,984 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2021-10-28 22:49:32,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 13 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2021-10-28 22:49:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2021-10-28 22:49:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 22:49:32,986 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:32,986 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:33,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:33,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:33,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:49:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:33,213 INFO L85 PathProgramCache]: Analyzing trace with hash 780870354, now seen corresponding path program 1 times [2021-10-28 22:49:33,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:33,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967037786] [2021-10-28 22:49:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:33,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:49:33,228 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:49:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:49:33,265 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 22:49:33,265 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:49:33,266 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 22:49:33,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 22:49:33,272 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:33,278 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:49:33,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:49:33 BoogieIcfgContainer [2021-10-28 22:49:33,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:49:33,358 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:49:33,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:49:33,360 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:49:33,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:25" (3/4) ... [2021-10-28 22:49:33,362 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 22:49:33,453 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:49:33,453 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:49:33,455 INFO L168 Benchmark]: Toolchain (without parser) took 9101.50 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 88.0 MB in the beginning and 101.1 MB in the end (delta: -13.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-28 22:49:33,455 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 123.7 MB. Free memory was 94.6 MB in the beginning and 94.6 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:49:33,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.91 ms. Allocated memory is still 123.7 MB. Free memory was 87.6 MB in the beginning and 98.3 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:49:33,457 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 123.7 MB. Free memory was 97.9 MB in the beginning and 96.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:49:33,457 INFO L168 Benchmark]: Boogie Preprocessor took 33.66 ms. Allocated memory is still 123.7 MB. Free memory was 96.6 MB in the beginning and 95.8 MB in the end (delta: 820.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:49:33,458 INFO L168 Benchmark]: RCFGBuilder took 369.95 ms. Allocated memory is still 123.7 MB. Free memory was 95.8 MB in the beginning and 86.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:49:33,459 INFO L168 Benchmark]: TraceAbstraction took 8318.10 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 85.7 MB in the beginning and 105.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-10-28 22:49:33,459 INFO L168 Benchmark]: Witness Printer took 94.64 ms. Allocated memory is still 148.9 MB. Free memory was 105.3 MB in the beginning and 101.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:49:33,462 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 123.7 MB. Free memory was 94.6 MB in the beginning and 94.6 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 234.91 ms. Allocated memory is still 123.7 MB. Free memory was 87.6 MB in the beginning and 98.3 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 123.7 MB. Free memory was 97.9 MB in the beginning and 96.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.66 ms. Allocated memory is still 123.7 MB. Free memory was 96.6 MB in the beginning and 95.8 MB in the end (delta: 820.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 369.95 ms. Allocated memory is still 123.7 MB. Free memory was 95.8 MB in the beginning and 86.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8318.10 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 85.7 MB in the beginning and 105.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Witness Printer took 94.64 ms. Allocated memory is still 148.9 MB. Free memory was 105.3 MB in the beginning and 101.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 4; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 3 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 247 SDtfs, 308 SDslu, 1378 SDs, 0 SdLazy, 2006 SolverSat, 271 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 516 GetRequests, 386 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 690 NumberOfCodeBlocks, 690 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 609 ConstructedInterpolants, 0 QuantifiedInterpolants, 1225 SizeOfPredicates, 19 NumberOfNonLiveVariables, 879 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 388/526 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 22:49:33,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3df7efe5-6bc4-41ff-bd12-40c2824b916e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...