/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-b7b32d2 [2021-02-21 20:24:17,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:24:17,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:24:17,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:24:17,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:24:17,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:24:17,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:24:17,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:24:17,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:24:17,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:24:17,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:24:17,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:24:17,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:24:17,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:24:17,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:24:17,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:24:17,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:24:17,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:24:17,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:24:17,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:24:17,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:24:17,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:24:17,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:24:17,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:24:17,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:24:17,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:24:17,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:24:17,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:24:17,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:24:17,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:24:17,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:24:17,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:24:17,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:24:17,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:24:17,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:24:17,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:24:17,612 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:24:17,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:24:17,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:24:17,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:24:17,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:24:17,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:24:17,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:24:17,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:24:18,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:24:18,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:24:18,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:24:18,084 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:24:18,085 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:24:18,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2021-02-21 20:24:18,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461aaaece/8505dd2a8e514a359b2db53a32d45302/FLAG1c844e2ba [2021-02-21 20:24:18,914 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:24:18,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2021-02-21 20:24:18,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461aaaece/8505dd2a8e514a359b2db53a32d45302/FLAG1c844e2ba [2021-02-21 20:24:19,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461aaaece/8505dd2a8e514a359b2db53a32d45302 [2021-02-21 20:24:19,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:24:19,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:24:19,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:24:19,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:24:19,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:24:19,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d6f2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19, skipping insertion in model container [2021-02-21 20:24:19,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:24:19,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:24:19,480 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] [2021-02-21 20:24:19,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:24:19,497 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:24:19,517 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] [2021-02-21 20:24:19,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:24:19,536 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:24:19,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19 WrapperNode [2021-02-21 20:24:19,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:24:19,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:24:19,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:24:19,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:24:19,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (1/1) ... [2021-02-21 20:24:19,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:24:19,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:24:19,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:24:19,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:24:19,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (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 [2021-02-21 20:24:19,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:24:19,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:24:19,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:24:19,712 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-21 20:24:19,712 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-21 20:24:19,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:24:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:24:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:24:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:24:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:24:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:24:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-21 20:24:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-21 20:24:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:24:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:24:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:24:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:24:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:24:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:24:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:24:20,209 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:24:20,210 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:24:20,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:24:20 BoogieIcfgContainer [2021-02-21 20:24:20,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:24:20,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:24:20,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:24:20,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:24:20,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:24:19" (1/3) ... [2021-02-21 20:24:20,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdde1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:24:20, skipping insertion in model container [2021-02-21 20:24:20,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:24:19" (2/3) ... [2021-02-21 20:24:20,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdde1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:24:20, skipping insertion in model container [2021-02-21 20:24:20,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:24:20" (3/3) ... [2021-02-21 20:24:20,224 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2021-02-21 20:24:20,233 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:24:20,239 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:24:20,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:24:20,292 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:24:20,293 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:24:20,293 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:24:20,293 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:24:20,293 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:24:20,293 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:24:20,294 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:24:20,294 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:24:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-21 20:24:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 20:24:20,322 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:24:20,324 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] [2021-02-21 20:24:20,324 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:24:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:24:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-21 20:24:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:24:20,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661232559] [2021-02-21 20:24:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:24:20,435 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:24:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:20,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:20,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:20,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:20,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:20,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:20,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:20,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:24:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:20,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:20,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:20,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:24:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:20,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:20,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:20,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:20,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:24:20,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661232559] [2021-02-21 20:24:20,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:24:20,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:24:20,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58756355] [2021-02-21 20:24:20,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:24:20,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:24:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:24:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:24:20,880 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-21 20:24:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:24:21,488 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-02-21 20:24:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:24:21,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-21 20:24:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:24:21,501 INFO L225 Difference]: With dead ends: 67 [2021-02-21 20:24:21,502 INFO L226 Difference]: Without dead ends: 50 [2021-02-21 20:24:21,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:24:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-21 20:24:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-21 20:24:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 20:24:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-21 20:24:21,578 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-21 20:24:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:24:21,582 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-21 20:24:21,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:24:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-21 20:24:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 20:24:21,585 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:24:21,586 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] [2021-02-21 20:24:21,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:24:21,587 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:24:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:24:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-21 20:24:21,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:24:21,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59388367] [2021-02-21 20:24:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:24:21,603 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:24:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:21,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:21,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:21,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:21,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:21,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:21,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:24:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:21,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:21,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:24:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:21,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:21,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:21,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:21,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:24:21,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59388367] [2021-02-21 20:24:21,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:24:21,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:24:21,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29239634] [2021-02-21 20:24:21,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:24:21,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:24:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:24:21,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:24:21,775 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-21 20:24:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:24:22,136 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-21 20:24:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:24:22,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-21 20:24:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:24:22,144 INFO L225 Difference]: With dead ends: 58 [2021-02-21 20:24:22,145 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 20:24:22,150 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 [2021-02-21 20:24:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 20:24:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-21 20:24:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 20:24:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-21 20:24:22,194 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-21 20:24:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:24:22,197 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-21 20:24:22,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:24:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-21 20:24:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 20:24:22,201 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:24:22,201 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] [2021-02-21 20:24:22,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:24:22,202 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:24:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:24:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-21 20:24:22,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:24:22,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348202604] [2021-02-21 20:24:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:24:22,212 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:24:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:22,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:22,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:22,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:22,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:24:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:22,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:22,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:24:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:22,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:22,390 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-21 20:24:22,391 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-21 20:24:22,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:24:22,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:22,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:22,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:24:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:22,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:22,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:24:22,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 20:24:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:24:22,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:24:22,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:24:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-21 20:24:22,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348202604] [2021-02-21 20:24:22,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:24:22,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:24:22,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096684429] [2021-02-21 20:24:22,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:24:22,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:24:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:24:22,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:24:22,491 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2021-02-21 20:24:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:24:22,869 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-21 20:24:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:24:22,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-02-21 20:24:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:24:22,879 INFO L225 Difference]: With dead ends: 90 [2021-02-21 20:24:22,879 INFO L226 Difference]: Without dead ends: 54 [2021-02-21 20:24:22,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:24:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-21 20:24:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-21 20:24:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-21 20:24:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-21 20:24:22,913 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-21 20:24:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:24:22,913 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-21 20:24:22,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:24:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-21 20:24:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-21 20:24:22,921 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:24:22,922 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] [2021-02-21 20:24:22,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:24:22,922 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:24:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:24:22,923 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-21 20:24:22,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:24:22,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793994562] [2021-02-21 20:24:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:24:22,928 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:24:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:24:22,978 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:24:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:24:23,007 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:24:23,052 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:24:23,053 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:24:23,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:24:23,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:24:23 BoogieIcfgContainer [2021-02-21 20:24:23,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:24:23,080 INFO L168 Benchmark]: Toolchain (without parser) took 3814.58 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.6 MB in the beginning and 91.4 MB in the end (delta: 36.3 MB). Peak memory consumption was 67.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:24:23,081 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:24:23,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:24:23,088 INFO L168 Benchmark]: Boogie Preprocessor took 45.53 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:24:23,090 INFO L168 Benchmark]: RCFGBuilder took 627.12 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 131.6 MB in the end (delta: -16.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-02-21 20:24:23,096 INFO L168 Benchmark]: TraceAbstraction took 2863.47 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.1 MB in the beginning and 91.4 MB in the end (delta: 39.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:24:23,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.53 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 627.12 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 131.6 MB in the end (delta: -16.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2863.47 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.1 MB in the beginning and 91.4 MB in the end (delta: 39.7 MB). Peak memory consumption was 70.7 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: 1.4s, 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, 0.7s 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...