/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:51:46,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:51:46,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:51:46,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:51:46,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:51:46,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:51:46,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:51:46,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:51:46,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:51:46,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:51:46,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:51:46,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:51:46,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:51:46,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:51:46,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:51:46,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:51:46,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:51:46,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:51:46,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:51:46,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:51:46,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:51:47,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:51:47,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:51:47,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:51:47,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:51:47,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:51:47,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:51:47,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:51:47,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:51:47,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:51:47,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:51:47,033 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:51:47,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:51:47,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:51:47,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:51:47,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:51:47,034 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:51:47,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:51:47,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:51:47,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:51:47,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:51:47,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:51:47,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:51:47,036 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:51:47,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:51:47,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:51:47,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:51:47,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:51:47,516 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:51:47,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2021-02-23 17:51:47,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6410a7798/5469ca7c49094719a7479de77cadfa94/FLAG178ad4456 [2021-02-23 17:51:48,297 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:51:48,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2021-02-23 17:51:48,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6410a7798/5469ca7c49094719a7479de77cadfa94/FLAG178ad4456 [2021-02-23 17:51:48,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6410a7798/5469ca7c49094719a7479de77cadfa94 [2021-02-23 17:51:48,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:51:48,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:51:48,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:51:48,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:51:48,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:51:48,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f60926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48, skipping insertion in model container [2021-02-23 17:51:48,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:51:48,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:51:48,882 WARN L226 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_2-1.c[946,959] [2021-02-23 17:51:48,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:51:48,904 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:51:48,923 WARN L226 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_2-1.c[946,959] [2021-02-23 17:51:48,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:51:48,942 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:51:48,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48 WrapperNode [2021-02-23 17:51:48,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:51:48,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:51:48,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:51:48,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:51:48,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... [2021-02-23 17:51:48,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:51:48,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:51:48,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:51:48,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:51:48,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:51:49,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:51:49,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:51:49,092 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:51:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-23 17:51:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-23 17:51:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:51:49,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:51:49,093 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:51:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:51:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:51:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:51:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-23 17:51:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-23 17:51:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:51:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:51:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:51:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:51:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:51:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:51:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:51:49,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:51:49,388 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:51:49,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:51:49 BoogieIcfgContainer [2021-02-23 17:51:49,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:51:49,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:51:49,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:51:49,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:51:49,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:51:48" (1/3) ... [2021-02-23 17:51:49,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d431279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:51:49, skipping insertion in model container [2021-02-23 17:51:49,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:51:48" (2/3) ... [2021-02-23 17:51:49,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d431279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:51:49, skipping insertion in model container [2021-02-23 17:51:49,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:51:49" (3/3) ... [2021-02-23 17:51:49,402 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2021-02-23 17:51:49,412 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:51:49,420 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:51:49,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:51:49,480 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:51:49,481 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:51:49,481 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:51:49,481 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:51:49,481 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:51:49,481 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:51:49,481 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:51:49,482 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:51:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-23 17:51:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 17:51:49,516 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:51:49,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:51:49,518 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:51:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:51:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-23 17:51:49,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:51:49,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937586341] [2021-02-23 17:51:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:51:49,677 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:51:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:49,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:49,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:49,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:49,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:49,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:49,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:49,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:51:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:49,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:49,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:49,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:51:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:49,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:49,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:49,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:49,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:51:49,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937586341] [2021-02-23 17:51:49,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:51:49,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:51:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121983502] [2021-02-23 17:51:49,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:51:49,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:51:49,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:51:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:51:50,001 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-23 17:51:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:51:50,487 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-02-23 17:51:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:51:50,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-23 17:51:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:51:50,521 INFO L225 Difference]: With dead ends: 67 [2021-02-23 17:51:50,521 INFO L226 Difference]: Without dead ends: 50 [2021-02-23 17:51:50,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:51:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-23 17:51:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-23 17:51:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:51:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 17:51:50,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-23 17:51:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:51:50,647 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 17:51:50,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:51:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 17:51:50,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 17:51:50,651 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:51:50,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:51:50,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:51:50,652 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:51:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:51:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-23 17:51:50,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:51:50,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392182804] [2021-02-23 17:51:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:51:50,672 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:51:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:50,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:50,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:50,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:50,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:50,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:50,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:50,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:51:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:50,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:50,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:50,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:51:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:50,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:50,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:50,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:50,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:51:50,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392182804] [2021-02-23 17:51:50,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:51:50,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:51:50,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158632502] [2021-02-23 17:51:50,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:51:50,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:51:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:51:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:51:50,872 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-23 17:51:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:51:51,262 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-23 17:51:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:51:51,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-23 17:51:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:51:51,270 INFO L225 Difference]: With dead ends: 58 [2021-02-23 17:51:51,271 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 17:51:51,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:51:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 17:51:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 17:51:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:51:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 17:51:51,324 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-23 17:51:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:51:51,324 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 17:51:51,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:51:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 17:51:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-23 17:51:51,330 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:51:51,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:51:51,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:51:51,332 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:51:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:51:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-23 17:51:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:51:51,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997776627] [2021-02-23 17:51:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:51:51,339 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:51:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:51,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:51,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:51,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:51,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:51:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:51,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:51,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:51:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:51,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:51,561 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 17:51:51,562 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 17:51:51,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:51:51,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:51,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:51,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:51:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:51,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:51,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:51:51,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 17:51:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:51:51,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:51:51,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:51:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 17:51:51,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997776627] [2021-02-23 17:51:51,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:51:51,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:51:51,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878149572] [2021-02-23 17:51:51,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:51:51,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:51:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:51:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:51:51,661 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2021-02-23 17:51:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:51:52,085 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-23 17:51:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:51:52,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-02-23 17:51:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:51:52,094 INFO L225 Difference]: With dead ends: 90 [2021-02-23 17:51:52,094 INFO L226 Difference]: Without dead ends: 54 [2021-02-23 17:51:52,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:51:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-23 17:51:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-23 17:51:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 17:51:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-23 17:51:52,128 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-23 17:51:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:51:52,129 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-23 17:51:52,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:51:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-23 17:51:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 17:51:52,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:51:52,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:51:52,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:51:52,141 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:51:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:51:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-23 17:51:52,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:51:52,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435237147] [2021-02-23 17:51:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:51:52,145 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:51:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:51:52,184 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:51:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:51:52,215 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:51:52,268 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:51:52,268 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:51:52,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:51:52,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:51:52 BoogieIcfgContainer [2021-02-23 17:51:52,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:51:52,293 INFO L168 Benchmark]: Toolchain (without parser) took 3622.79 ms. Allocated memory was 173.0 MB in the beginning and 224.4 MB in the end (delta: 51.4 MB). Free memory was 148.8 MB in the beginning and 203.7 MB in the end (delta: -54.9 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. [2021-02-23 17:51:52,294 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 173.0 MB. Free memory is still 156.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:51:52,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.75 ms. Allocated memory is still 173.0 MB. Free memory was 147.8 MB in the beginning and 138.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:51:52,296 INFO L168 Benchmark]: Boogie Preprocessor took 36.56 ms. Allocated memory is still 173.0 MB. Free memory was 138.3 MB in the beginning and 136.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:51:52,296 INFO L168 Benchmark]: RCFGBuilder took 409.42 ms. Allocated memory is still 173.0 MB. Free memory was 136.9 MB in the beginning and 149.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:51:52,297 INFO L168 Benchmark]: TraceAbstraction took 2899.39 ms. Allocated memory was 173.0 MB in the beginning and 224.4 MB in the end (delta: 51.4 MB). Free memory was 149.3 MB in the beginning and 203.7 MB in the end (delta: -54.4 MB). Peak memory consumption was 103.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:51:52,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 173.0 MB. Free memory is still 156.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.75 ms. Allocated memory is still 173.0 MB. Free memory was 147.8 MB in the beginning and 138.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.56 ms. Allocated memory is still 173.0 MB. Free memory was 138.3 MB in the beginning and 136.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 409.42 ms. Allocated memory is still 173.0 MB. Free memory was 136.9 MB in the beginning and 149.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2899.39 ms. Allocated memory was 173.0 MB in the beginning and 224.4 MB in the end (delta: 51.4 MB). Free memory was 149.3 MB in the beginning and 203.7 MB in the end (delta: -54.4 MB). Peak memory consumption was 103.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 2; [L39] CALL, EXPR fibo1(x) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND TRUE n == 1 [L23] return 1; [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND TRUE n < 1 [L21] return 0; [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 1 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 174 SDslu, 170 SDs, 0 SdLazy, 380 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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! Received shutdown request...