./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c --full-output --witness-type violation_witness --validate ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/fibo_5-2.yml/witness.yml --preprocessor.replace.while.statements.and.if-then-else.statements false --icfgbuilder.size.of.a.code.block SequenceOfStatements --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26998269 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/fibo_5-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --preprocessor.replace.while.statements.and.if-then-else.statements false --icfgbuilder.size.of.a.code.block SequenceOfStatements --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.yaml-violation-witnesses-2699826-m [2024-08-14 14:34:07,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-08-14 14:34:07,661 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-08-14 14:34:07,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-08-14 14:34:07,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-08-14 14:34:07,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-08-14 14:34:07,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-08-14 14:34:07,693 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-08-14 14:34:07,694 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-08-14 14:34:07,694 INFO L153 SettingsManager]: * Use memory slicer=true [2024-08-14 14:34:07,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-08-14 14:34:07,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-08-14 14:34:07,697 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-08-14 14:34:07,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-08-14 14:34:07,703 INFO L153 SettingsManager]: * Use SBE=true [2024-08-14 14:34:07,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-08-14 14:34:07,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-08-14 14:34:07,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-08-14 14:34:07,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-08-14 14:34:07,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-08-14 14:34:07,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-08-14 14:34:07,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-08-14 14:34:07,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-08-14 14:34:07,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-08-14 14:34:07,707 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-08-14 14:34:07,707 INFO L153 SettingsManager]: * sizeof long double=12 [2024-08-14 14:34:07,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-08-14 14:34:07,708 INFO L153 SettingsManager]: * Use constant arrays=true [2024-08-14 14:34:07,708 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-08-14 14:34:07,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-08-14 14:34:07,709 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-08-14 14:34:07,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-08-14 14:34:07,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-08-14 14:34:07,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-08-14 14:34:07,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-08-14 14:34:07,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-08-14 14:34:07,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-08-14 14:34:07,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-08-14 14:34:07,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-08-14 14:34:07,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-08-14 14:34:07,713 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-08-14 14:34:07,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-08-14 14:34:07,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-08-14 14:34:07,714 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder: Size of a code block -> SequenceOfStatements [2024-08-14 14:34:07,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-08-14 14:34:07,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-08-14 14:34:07,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-08-14 14:34:07,985 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-08-14 14:34:07,986 INFO L274 PluginConnector]: Witness Parser initialized [2024-08-14 14:34:07,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/fibo_5-2.yml/witness.yml [2024-08-14 14:34:08,153 INFO L270 PluginConnector]: Initializing CDTParser... [2024-08-14 14:34:08,153 INFO L274 PluginConnector]: CDTParser initialized [2024-08-14 14:34:08,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2024-08-14 14:34:09,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-08-14 14:34:09,795 INFO L384 CDTParser]: Found 1 translation units. [2024-08-14 14:34:09,796 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2024-08-14 14:34:09,802 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c590e094f/5cde2d177b2447248cd666ad64cacbd1/FLAG7232ea8a8 [2024-08-14 14:34:09,815 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c590e094f/5cde2d177b2447248cd666ad64cacbd1 [2024-08-14 14:34:09,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-08-14 14:34:09,817 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2024-08-14 14:34:09,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-08-14 14:34:09,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-08-14 14:34:09,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-08-14 14:34:09,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:34:08" (1/2) ... [2024-08-14 14:34:09,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221f5736 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:34:09, skipping insertion in model container [2024-08-14 14:34:09,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:34:08" (1/2) ... [2024-08-14 14:34:09,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bf15033 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:34:09, skipping insertion in model container [2024-08-14 14:34:09,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:34:09" (2/2) ... [2024-08-14 14:34:09,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221f5736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:09, skipping insertion in model container [2024-08-14 14:34:09,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:34:09" (2/2) ... [2024-08-14 14:34:09,847 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-08-14 14:34:09,991 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c[740,753] [2024-08-14 14:34:09,995 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:34:10,007 INFO L200 MainTranslator]: Completed pre-run [2024-08-14 14:34:10,024 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c[740,753] [2024-08-14 14:34:10,025 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:34:10,044 INFO L204 MainTranslator]: Completed translation [2024-08-14 14:34:10,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10 WrapperNode [2024-08-14 14:34:10,046 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-08-14 14:34:10,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-08-14 14:34:10,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-08-14 14:34:10,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-08-14 14:34:10,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,067 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,082 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-08-14 14:34:10,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,087 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,088 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-08-14 14:34:10,092 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-08-14 14:34:10,092 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-08-14 14:34:10,093 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-08-14 14:34:10,094 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (1/1) ... [2024-08-14 14:34:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-08-14 14:34:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:34:10,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-08-14 14:34:10,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-08-14 14:34:10,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-08-14 14:34:10,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-08-14 14:34:10,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2024-08-14 14:34:10,181 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-08-14 14:34:10,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-08-14 14:34:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2024-08-14 14:34:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2024-08-14 14:34:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-08-14 14:34:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-08-14 14:34:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-08-14 14:34:10,244 INFO L273 CfgBuilder]: Building ICFG [2024-08-14 14:34:10,246 INFO L304 CfgBuilder]: Building CFG for each procedure with an implementation [2024-08-14 14:34:10,342 INFO L1266 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2024-08-14 14:34:10,372 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-08-14 14:34:10,372 INFO L327 CfgBuilder]: Performing block encoding [2024-08-14 14:34:10,380 INFO L349 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-08-14 14:34:10,381 INFO L354 CfgBuilder]: Removed 0 assume(true) statements. [2024-08-14 14:34:10,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:34:10 BoogieIcfgContainer [2024-08-14 14:34:10,381 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-08-14 14:34:10,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-08-14 14:34:10,384 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-08-14 14:34:10,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-08-14 14:34:10,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:34:08" (1/4) ... [2024-08-14 14:34:10,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73327bf9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction VIOLATION_WITNESS 14.08 02:34:10, skipping insertion in model container [2024-08-14 14:34:10,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.08 02:34:09" (2/4) ... [2024-08-14 14:34:10,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73327bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:34:10, skipping insertion in model container [2024-08-14 14:34:10,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:10" (3/4) ... [2024-08-14 14:34:10,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73327bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:34:10, skipping insertion in model container [2024-08-14 14:34:10,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:34:10" (4/4) ... [2024-08-14 14:34:10,392 INFO L119 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2024-08-14 14:34:10,392 WARN L130 eAbstractionObserver]: Found a witness in the YAML format. I will only consider traces that are accepted by the witness [2024-08-14 14:34:10,410 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-08-14 14:34:10,411 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-08-14 14:34:10,438 INFO L92 WitnessUtils]: Constructing product of automaton with 26 states and violation witness of the following lengths: [59] [2024-08-14 14:34:10,442 INFO L82 GeneralOperation]: Start removeDeadEnds. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-08-14 14:34:10,814 INFO L88 GeneralOperation]: Finished removeDeadEnds. Reduced from 695 states to 318 states. [2024-08-14 14:34:10,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-08-14 14:34:10,843 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a306cff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-08-14 14:34:10,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-08-14 14:34:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states. [2024-08-14 14:34:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-08-14 14:34:10,915 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:34:10,916 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 16, 11, 11, 11, 11, 11, 11, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-08-14 14:34:10,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:34:10,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:34:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash 736245017, now seen corresponding path program 1 times [2024-08-14 14:34:10,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:34:10,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805604166] [2024-08-14 14:34:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:34:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:34:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-08-14 14:34:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-08-14 14:34:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-08-14 14:34:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-08-14 14:34:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-08-14 14:34:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-08-14 14:34:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-08-14 14:34:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-08-14 14:34:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-08-14 14:34:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-08-14 14:34:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 128 proven. 204 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-08-14 14:34:12,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-08-14 14:34:12,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805604166] [2024-08-14 14:34:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805604166] provided 0 perfect and 1 imperfect interpolant sequences [2024-08-14 14:34:12,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676980903] [2024-08-14 14:34:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:34:12,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-08-14 14:34:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:34:12,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-08-14 14:34:12,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-08-14 14:34:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 8 conjunts are in the unsatisfiable core [2024-08-14 14:34:12,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-08-14 14:34:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 51 proven. 238 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2024-08-14 14:34:12,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-08-14 14:34:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 51 proven. 243 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2024-08-14 14:34:13,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676980903] provided 0 perfect and 2 imperfect interpolant sequences [2024-08-14 14:34:13,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-08-14 14:34:13,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 18 [2024-08-14 14:34:13,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598392255] [2024-08-14 14:34:13,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-08-14 14:34:13,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-08-14 14:34:13,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-08-14 14:34:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-08-14 14:34:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-08-14 14:34:13,694 INFO L87 Difference]: Start difference. First operand 318 states. Second operand has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 18 states have internal predecessors, (47), 12 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2024-08-14 14:34:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-08-14 14:34:13,904 INFO L93 Difference]: Finished difference Result 397 states and 701 transitions. [2024-08-14 14:34:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-08-14 14:34:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 18 states have internal predecessors, (47), 12 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) Word has length 162 [2024-08-14 14:34:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-08-14 14:34:13,913 INFO L225 Difference]: With dead ends: 397 [2024-08-14 14:34:13,913 INFO L226 Difference]: Without dead ends: 333 [2024-08-14 14:34:13,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 365 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2024-08-14 14:34:13,918 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-08-14 14:34:13,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 146 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-08-14 14:34:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-08-14 14:34:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 254. [2024-08-14 14:34:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 174 states have (on average 1.132183908045977) internal successors, (197), 176 states have internal predecessors, (197), 33 states have call successors, (33), 32 states have call predecessors, (33), 46 states have return successors, (163), 45 states have call predecessors, (163), 32 states have call successors, (163) [2024-08-14 14:34:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 393 transitions. [2024-08-14 14:34:14,047 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 393 transitions. Word has length 162 [2024-08-14 14:34:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-08-14 14:34:14,050 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 393 transitions. [2024-08-14 14:34:14,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 18 states have internal predecessors, (47), 12 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2024-08-14 14:34:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 393 transitions. [2024-08-14 14:34:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-08-14 14:34:14,057 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:34:14,058 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-08-14 14:34:14,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-08-14 14:34:14,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-08-14 14:34:14,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:34:14,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:34:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 816284033, now seen corresponding path program 2 times [2024-08-14 14:34:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:34:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430069656] [2024-08-14 14:34:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:34:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:34:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-08-14 14:34:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-08-14 14:34:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-08-14 14:34:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-08-14 14:34:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-08-14 14:34:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-08-14 14:34:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-08-14 14:34:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 230 proven. 170 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2024-08-14 14:34:14,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-08-14 14:34:14,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430069656] [2024-08-14 14:34:14,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430069656] provided 0 perfect and 1 imperfect interpolant sequences [2024-08-14 14:34:14,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792769652] [2024-08-14 14:34:14,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-08-14 14:34:14,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-08-14 14:34:14,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:34:14,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-08-14 14:34:14,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-08-14 14:34:14,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-08-14 14:34:14,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-08-14 14:34:14,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 14 conjunts are in the unsatisfiable core [2024-08-14 14:34:14,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-08-14 14:34:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-08-14 14:34:15,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-08-14 14:34:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 337 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-08-14 14:34:16,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792769652] provided 0 perfect and 2 imperfect interpolant sequences [2024-08-14 14:34:16,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-08-14 14:34:16,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 15] total 23 [2024-08-14 14:34:16,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406519093] [2024-08-14 14:34:16,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-08-14 14:34:16,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-08-14 14:34:16,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-08-14 14:34:16,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-08-14 14:34:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2024-08-14 14:34:16,618 INFO L87 Difference]: Start difference. First operand 254 states and 393 transitions. Second operand has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-08-14 14:34:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-08-14 14:34:16,937 INFO L93 Difference]: Finished difference Result 246 states and 348 transitions. [2024-08-14 14:34:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-08-14 14:34:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 137 [2024-08-14 14:34:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-08-14 14:34:16,940 INFO L225 Difference]: With dead ends: 246 [2024-08-14 14:34:16,940 INFO L226 Difference]: Without dead ends: 111 [2024-08-14 14:34:16,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 298 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2024-08-14 14:34:16,942 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-08-14 14:34:16,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 201 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-08-14 14:34:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-08-14 14:34:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-08-14 14:34:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-08-14 14:34:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2024-08-14 14:34:16,959 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 137 [2024-08-14 14:34:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-08-14 14:34:16,960 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2024-08-14 14:34:16,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-08-14 14:34:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2024-08-14 14:34:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-08-14 14:34:16,963 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:34:16,964 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-08-14 14:34:16,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-08-14 14:34:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-08-14 14:34:17,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:34:17,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:34:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash 37683497, now seen corresponding path program 3 times [2024-08-14 14:34:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:34:17,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14590062] [2024-08-14 14:34:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:34:17,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:34:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:34:17,185 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-08-14 14:34:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:34:17,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-08-14 14:34:17,219 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-08-14 14:34:17,220 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-08-14 14:34:17,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-08-14 14:34:17,225 INFO L445 BasicCegarLoop]: Path program histogram: [3] [2024-08-14 14:34:17,229 INFO L196 ceAbstractionStarter]: Computing trace abstraction results [2024-08-14 14:34:17,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.08 02:34:17 BoogieIcfgContainer [2024-08-14 14:34:17,278 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-08-14 14:34:17,278 INFO L158 Benchmark]: Toolchain (without parser) took 7461.78ms. Allocated memory was 169.9MB in the beginning and 224.4MB in the end (delta: 54.5MB). Free memory was 97.9MB in the beginning and 72.5MB in the end (delta: 25.3MB). Peak memory consumption was 80.5MB. Max. memory is 16.1GB. [2024-08-14 14:34:17,278 INFO L158 Benchmark]: Witness Parser took 0.21ms. Allocated memory is still 169.9MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:34:17,279 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 169.9MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:34:17,279 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.74ms. Allocated memory is still 169.9MB. Free memory was 97.6MB in the beginning and 86.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-08-14 14:34:17,279 INFO L158 Benchmark]: Boogie Preprocessor took 44.81ms. Allocated memory is still 169.9MB. Free memory was 86.4MB in the beginning and 84.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-08-14 14:34:17,279 INFO L158 Benchmark]: IcfgBuilder took 288.97ms. Allocated memory is still 169.9MB. Free memory was 84.7MB in the beginning and 72.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-08-14 14:34:17,280 INFO L158 Benchmark]: TraceAbstraction took 6893.89ms. Allocated memory was 169.9MB in the beginning and 224.4MB in the end (delta: 54.5MB). Free memory was 71.8MB in the beginning and 72.5MB in the end (delta: -774.6kB). Peak memory consumption was 55.3MB. Max. memory is 16.1GB. [2024-08-14 14:34:17,285 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.21ms. Allocated memory is still 169.9MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.20ms. Allocated memory is still 169.9MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.74ms. Allocated memory is still 169.9MB. Free memory was 97.6MB in the beginning and 86.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.81ms. Allocated memory is still 169.9MB. Free memory was 86.4MB in the beginning and 84.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 288.97ms. Allocated memory is still 169.9MB. Free memory was 84.7MB in the beginning and 72.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6893.89ms. Allocated memory was 169.9MB in the beginning and 224.4MB in the end (delta: 54.5MB). Free memory was 71.8MB in the beginning and 72.5MB in the end (delta: -774.6kB). Peak memory consumption was 55.3MB. Max. memory is 16.1GB. * 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: 29]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int x = 5; VAL [x=5] [L27] CALL, EXPR fibo(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=4, n=4] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=5, n=5] [L13] return fibo(n-1) + fibo(n-2); [L27] RET, EXPR fibo(x) VAL [x=5] [L27] int result = fibo(x); [L28] COND TRUE result == 5 VAL [x=5] [L29] reach_error() VAL [x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.8s, OverallIterations: 3, TraceHistogramMax: 23, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 62 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 347 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 296 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 452 IncrementalHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 51 mSDtfsCounter, 452 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 722 GetRequests, 663 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=318occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 79 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 708 NumberOfCodeBlocks, 708 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 891 ConstructedInterpolants, 0 QuantifiedInterpolants, 1377 SizeOfPredicates, 8 NumberOfNonLiveVariables, 702 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 6 InterpolantComputations, 0 PerfectInterpolantSequences, 5361/6855 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! [2024-08-14 14:34:17,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE