./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c --full-output --witness-type violation_witness --validate ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/fibo_2calls_6-2.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_2calls_6-2.c ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/fibo_2calls_6-2.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 14:34:06,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-08-14 14:34:06,373 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-08-14 14:34:06,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-08-14 14:34:06,376 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-08-14 14:34:06,392 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-08-14 14:34:06,392 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-08-14 14:34:06,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-08-14 14:34:06,393 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-08-14 14:34:06,393 INFO L153 SettingsManager]: * Use memory slicer=true [2024-08-14 14:34:06,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-08-14 14:34:06,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-08-14 14:34:06,394 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-08-14 14:34:06,394 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-08-14 14:34:06,395 INFO L153 SettingsManager]: * Use SBE=true [2024-08-14 14:34:06,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-08-14 14:34:06,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-08-14 14:34:06,396 INFO L153 SettingsManager]: * sizeof long=4 [2024-08-14 14:34:06,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-08-14 14:34:06,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-08-14 14:34:06,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-08-14 14:34:06,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-08-14 14:34:06,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-08-14 14:34:06,404 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-08-14 14:34:06,405 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-08-14 14:34:06,405 INFO L153 SettingsManager]: * sizeof long double=12 [2024-08-14 14:34:06,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-08-14 14:34:06,405 INFO L153 SettingsManager]: * Use constant arrays=true [2024-08-14 14:34:06,405 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-08-14 14:34:06,405 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-08-14 14:34:06,406 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-08-14 14:34:06,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-08-14 14:34:06,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-08-14 14:34:06,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-08-14 14:34:06,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-08-14 14:34:06,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-08-14 14:34:06,407 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-08-14 14:34:06,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-08-14 14:34:06,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-08-14 14:34:06,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-08-14 14:34:06,408 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-08-14 14:34:06,408 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-08-14 14:34:06,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-08-14 14:34:06,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder: Size of a code block -> SequenceOfStatements [2024-08-14 14:34:06,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-08-14 14:34:06,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-08-14 14:34:06,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-08-14 14:34:06,603 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-08-14 14:34:06,604 INFO L274 PluginConnector]: Witness Parser initialized [2024-08-14 14:34:06,604 INFO L431 ainManager$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_2calls_6-2.yml/witness.yml [2024-08-14 14:34:06,755 INFO L270 PluginConnector]: Initializing CDTParser... [2024-08-14 14:34:06,756 INFO L274 PluginConnector]: CDTParser initialized [2024-08-14 14:34:06,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2024-08-14 14:34:08,097 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-08-14 14:34:08,263 INFO L384 CDTParser]: Found 1 translation units. [2024-08-14 14:34:08,263 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2024-08-14 14:34:08,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80966948/d1eaf99a318a41269257ce7b3e820452/FLAGdf05c5247 [2024-08-14 14:34:08,651 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80966948/d1eaf99a318a41269257ce7b3e820452 [2024-08-14 14:34:08,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-08-14 14:34:08,658 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2024-08-14 14:34:08,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-08-14 14:34:08,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-08-14 14:34:08,669 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-08-14 14:34:08,670 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:34:06" (1/2) ... [2024-08-14 14:34:08,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53acb915 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:34:08, skipping insertion in model container [2024-08-14 14:34:08,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:34:06" (1/2) ... [2024-08-14 14:34:08,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64cddb9f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:34:08, skipping insertion in model container [2024-08-14 14:34:08,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:34:08" (2/2) ... [2024-08-14 14:34:08,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53acb915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08, skipping insertion in model container [2024-08-14 14:34:08,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:34:08" (2/2) ... [2024-08-14 14:34:08,690 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-08-14 14:34:08,859 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_2calls_6-2.c[946,959] [2024-08-14 14:34:08,863 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:34:08,874 INFO L200 MainTranslator]: Completed pre-run [2024-08-14 14:34:08,884 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_2calls_6-2.c[946,959] [2024-08-14 14:34:08,886 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:34:08,910 INFO L204 MainTranslator]: Completed translation [2024-08-14 14:34:08,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08 WrapperNode [2024-08-14 14:34:08,911 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-08-14 14:34:08,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-08-14 14:34:08,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-08-14 14:34:08,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-08-14 14:34:08,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,933 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 14:34:08,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-08-14 14:34:08,938 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-08-14 14:34:08,938 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-08-14 14:34:08,938 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-08-14 14:34:08,939 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (1/1) ... [2024-08-14 14:34:08,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-08-14 14:34:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:34:08,969 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 14:34:08,971 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 14:34:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-08-14 14:34:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-08-14 14:34:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2024-08-14 14:34:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-08-14 14:34:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-08-14 14:34:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-08-14 14:34:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2024-08-14 14:34:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2024-08-14 14:34:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2024-08-14 14:34:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2024-08-14 14:34:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-08-14 14:34:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-08-14 14:34:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-08-14 14:34:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-08-14 14:34:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-08-14 14:34:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-08-14 14:34:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-08-14 14:34:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-08-14 14:34:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-08-14 14:34:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-08-14 14:34:09,066 INFO L273 CfgBuilder]: Building ICFG [2024-08-14 14:34:09,070 INFO L304 CfgBuilder]: Building CFG for each procedure with an implementation [2024-08-14 14:34:09,131 INFO L1266 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2024-08-14 14:34:09,144 INFO L1266 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2024-08-14 14:34:09,180 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-08-14 14:34:09,181 INFO L327 CfgBuilder]: Performing block encoding [2024-08-14 14:34:09,188 INFO L349 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-08-14 14:34:09,188 INFO L354 CfgBuilder]: Removed 0 assume(true) statements. [2024-08-14 14:34:09,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:34:09 BoogieIcfgContainer [2024-08-14 14:34:09,188 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-08-14 14:34:09,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-08-14 14:34:09,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-08-14 14:34:09,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-08-14 14:34:09,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:34:06" (1/4) ... [2024-08-14 14:34:09,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baba8c6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction VIOLATION_WITNESS 14.08 02:34:09, skipping insertion in model container [2024-08-14 14:34:09,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.08 02:34:08" (2/4) ... [2024-08-14 14:34:09,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baba8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:34:09, skipping insertion in model container [2024-08-14 14:34:09,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:34:08" (3/4) ... [2024-08-14 14:34:09,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baba8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:34:09, skipping insertion in model container [2024-08-14 14:34:09,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:34:09" (4/4) ... [2024-08-14 14:34:09,196 INFO L119 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2024-08-14 14:34:09,196 WARN L130 eAbstractionObserver]: Found a witness in the YAML format. I will only consider traces that are accepted by the witness [2024-08-14 14:34:09,212 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-08-14 14:34:09,213 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-08-14 14:34:09,236 INFO L92 WitnessUtils]: Constructing product of automaton with 35 states and violation witness of the following lengths: [97] [2024-08-14 14:34:09,239 INFO L82 GeneralOperation]: Start removeDeadEnds. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-08-14 14:34:09,998 INFO L88 GeneralOperation]: Finished removeDeadEnds. Reduced from 1780 states to 1167 states. [2024-08-14 14:34:10,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-08-14 14:34:10,047 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;@2b043df0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-08-14 14:34:10,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-08-14 14:34:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states. [2024-08-14 14:34:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2024-08-14 14:34:10,191 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:34:10,192 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 15, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-08-14 14:34:10,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:34:10,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:34:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash -831636693, now seen corresponding path program 1 times [2024-08-14 14:34:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:34:10,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608194786] [2024-08-14 14:34:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:34:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:34:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:10,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-08-14 14:34:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:10,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-08-14 14:34:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-08-14 14:34:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-08-14 14:34:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-08-14 14:34:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-08-14 14:34:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-08-14 14:34:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-08-14 14:34:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-08-14 14:34:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-08-14 14:34:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-08-14 14:34:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-08-14 14:34:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2024-08-14 14:34:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2024-08-14 14:34:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-08-14 14:34:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-08-14 14:34:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-08-14 14:34:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-08-14 14:34:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 230 proven. 206 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2024-08-14 14:34:11,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-08-14 14:34:11,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608194786] [2024-08-14 14:34:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608194786] provided 0 perfect and 1 imperfect interpolant sequences [2024-08-14 14:34:11,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64181484] [2024-08-14 14:34:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:34:11,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-08-14 14:34:11,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:34:11,841 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 14:34:11,843 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 14:34:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-08-14 14:34:12,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 16 conjunts are in the unsatisfiable core [2024-08-14 14:34:12,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-08-14 14:34:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 243 proven. 421 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2024-08-14 14:34:12,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-08-14 14:34:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 243 proven. 442 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2024-08-14 14:34:14,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64181484] provided 0 perfect and 2 imperfect interpolant sequences [2024-08-14 14:34:14,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-08-14 14:34:14,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 17] total 23 [2024-08-14 14:34:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397553751] [2024-08-14 14:34:14,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-08-14 14:34:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-08-14 14:34:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-08-14 14:34:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-08-14 14:34:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-08-14 14:34:14,521 INFO L87 Difference]: Start difference. First operand 1167 states. Second operand has 23 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 23 states have internal predecessors, (82), 19 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (33), 9 states have call predecessors, (33), 19 states have call successors, (33) [2024-08-14 14:34:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-08-14 14:34:15,405 INFO L93 Difference]: Finished difference Result 3046 states and 29680 transitions. [2024-08-14 14:34:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-08-14 14:34:15,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 23 states have internal predecessors, (82), 19 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (33), 9 states have call predecessors, (33), 19 states have call successors, (33) Word has length 283 [2024-08-14 14:34:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-08-14 14:34:15,422 INFO L225 Difference]: With dead ends: 3046 [2024-08-14 14:34:15,422 INFO L226 Difference]: Without dead ends: 965 [2024-08-14 14:34:15,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 634 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2024-08-14 14:34:15,426 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 39 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-08-14 14:34:15,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 585 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-08-14 14:34:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2024-08-14 14:34:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 879. [2024-08-14 14:34:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 567 states have (on average 1.1499118165784832) internal successors, (652), 613 states have internal predecessors, (652), 148 states have call successors, (148), 80 states have call predecessors, (148), 163 states have return successors, (368), 185 states have call predecessors, (368), 147 states have call successors, (368) [2024-08-14 14:34:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1168 transitions. [2024-08-14 14:34:15,540 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1168 transitions. Word has length 283 [2024-08-14 14:34:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-08-14 14:34:15,540 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1168 transitions. [2024-08-14 14:34:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 23 states have internal predecessors, (82), 19 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (33), 9 states have call predecessors, (33), 19 states have call successors, (33) [2024-08-14 14:34:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1168 transitions. [2024-08-14 14:34:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-08-14 14:34:15,547 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:34:15,547 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-08-14 14:34:15,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-08-14 14:34:15,748 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 14:34:15,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:34:15,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:34:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash 187106458, now seen corresponding path program 2 times [2024-08-14 14:34:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:34:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266316196] [2024-08-14 14:34:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:34:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:34:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:34:15,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-08-14 14:34:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:34:15,823 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-08-14 14:34:15,824 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-08-14 14:34:15,824 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-08-14 14:34:15,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-08-14 14:34:15,829 INFO L445 BasicCegarLoop]: Path program histogram: [2] [2024-08-14 14:34:15,832 INFO L196 ceAbstractionStarter]: Computing trace abstraction results [2024-08-14 14:34:15,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.08 02:34:15 BoogieIcfgContainer [2024-08-14 14:34:15,875 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-08-14 14:34:15,876 INFO L158 Benchmark]: Toolchain (without parser) took 7218.66ms. Allocated memory was 167.8MB in the beginning and 356.5MB in the end (delta: 188.7MB). Free memory was 88.7MB in the beginning and 234.7MB in the end (delta: -146.0MB). Peak memory consumption was 44.1MB. Max. memory is 16.1GB. [2024-08-14 14:34:15,876 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 167.8MB. Free memory is still 121.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:34:15,876 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 167.8MB. Free memory is still 134.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:34:15,877 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.87ms. Allocated memory is still 167.8MB. Free memory was 88.4MB in the beginning and 138.9MB in the end (delta: -50.5MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2024-08-14 14:34:15,878 INFO L158 Benchmark]: Boogie Preprocessor took 25.29ms. Allocated memory is still 167.8MB. Free memory was 138.9MB in the beginning and 136.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-08-14 14:34:15,879 INFO L158 Benchmark]: IcfgBuilder took 250.55ms. Allocated memory is still 167.8MB. Free memory was 136.8MB in the beginning and 124.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-08-14 14:34:15,879 INFO L158 Benchmark]: TraceAbstraction took 6684.63ms. Allocated memory was 167.8MB in the beginning and 356.5MB in the end (delta: 188.7MB). Free memory was 123.2MB in the beginning and 234.7MB in the end (delta: -111.5MB). Peak memory consumption was 77.2MB. Max. memory is 16.1GB. [2024-08-14 14:34:15,880 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 0.15ms. Allocated memory is still 167.8MB. Free memory is still 121.8MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 167.8MB. Free memory is still 134.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.87ms. Allocated memory is still 167.8MB. Free memory was 88.4MB in the beginning and 138.9MB in the end (delta: -50.5MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.29ms. Allocated memory is still 167.8MB. Free memory was 138.9MB in the beginning and 136.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 250.55ms. Allocated memory is still 167.8MB. Free memory was 136.8MB in the beginning and 124.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6684.63ms. Allocated memory was 167.8MB in the beginning and 356.5MB in the end (delta: 188.7MB). Free memory was 123.2MB in the beginning and 234.7MB in the end (delta: -111.5MB). Peak memory consumption was 77.2MB. 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: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 6; VAL [x=6] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) 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] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, 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] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, 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] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, 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] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, 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] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) 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] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, 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] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) 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] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) 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] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, 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] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) 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] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-2) 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] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, 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] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [x=6] [L39] int result = fibo1(x); [L40] COND TRUE result == 8 VAL [x=6] [L41] reach_error() VAL [x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 2, TraceHistogramMax: 21, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 585 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 533 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 586 IncrementalHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 52 mSDtfsCounter, 586 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 634 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1167occurred in iteration=0, InterpolantAutomatonStates: 16, 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, 1 MinimizatonAttempts, 86 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 846 ConstructedInterpolants, 0 QuantifiedInterpolants, 1162 SizeOfPredicates, 7 NumberOfNonLiveVariables, 648 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 3 InterpolantComputations, 0 PerfectInterpolantSequences, 5399/6468 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 14:34:15,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with 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