/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/Ackermann02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:38:44,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:38:44,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:38:44,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:38:44,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:38:44,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:38:44,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:38:44,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:38:44,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:38:44,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:38:44,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:38:44,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:38:44,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:38:44,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:38:44,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:38:44,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:38:44,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:38:44,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:38:44,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:38:44,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:38:44,377 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 17:38:44,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:38:44,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:38:44,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:38:44,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:38:44,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:38:44,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:38:44,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:38:44,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:38:44,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:38:44,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:38:44,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:38:44,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:38:44,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:38:44,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:38:44,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:38:44,394 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:38:44,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:38:44,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:38:44,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:38:44,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:38:44,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:38:44,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:38:44,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:38:44,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:38:44,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:38:44,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:38:44,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:38:44,789 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:38:44,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann02.c [2021-02-23 17:38:44,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4ddb2e19/e778acea51254489a64870a78c9b6506/FLAGfa907fffa [2021-02-23 17:38:45,566 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:38:45,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann02.c [2021-02-23 17:38:45,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4ddb2e19/e778acea51254489a64870a78c9b6506/FLAGfa907fffa [2021-02-23 17:38:45,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4ddb2e19/e778acea51254489a64870a78c9b6506 [2021-02-23 17:38:45,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:38:45,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:38:45,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:45,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:38:45,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:38:45,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1b1b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45, skipping insertion in model container [2021-02-23 17:38:45,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:38:46,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:38:46,159 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/Ackermann02.c[1157,1170] [2021-02-23 17:38:46,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:46,178 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:38:46,207 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/Ackermann02.c[1157,1170] [2021-02-23 17:38:46,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:46,239 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:38:46,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46 WrapperNode [2021-02-23 17:38:46,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:46,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:38:46,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:38:46,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:38:46,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (1/1) ... [2021-02-23 17:38:46,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (1/1) ... [2021-02-23 17:38:46,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (1/1) ... [2021-02-23 17:38:46,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (1/1) ... [2021-02-23 17:38:46,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (1/1) ... [2021-02-23 17:38:46,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (1/1) ... [2021-02-23 17:38:46,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (1/1) ... [2021-02-23 17:38:46,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:38:46,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:38:46,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:38:46,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:38:46,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (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 17:38:46,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:38:46,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:38:46,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:38:46,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-02-23 17:38:46,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:38:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:38:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:38:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:38:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:38:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:38:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-02-23 17:38:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:38:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:38:46,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:38:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:38:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:38:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:38:46,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:38:46,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:38:46,665 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:38:46,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:46 BoogieIcfgContainer [2021-02-23 17:38:46,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:38:46,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:38:46,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:38:46,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:38:46,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:38:45" (1/3) ... [2021-02-23 17:38:46,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2215483c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:46, skipping insertion in model container [2021-02-23 17:38:46,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:46" (2/3) ... [2021-02-23 17:38:46,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2215483c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:46, skipping insertion in model container [2021-02-23 17:38:46,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:46" (3/3) ... [2021-02-23 17:38:46,679 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2021-02-23 17:38:46,707 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:38:46,712 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:38:46,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:38:46,776 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:38:46,776 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:38:46,776 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:38:46,776 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:38:46,777 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:38:46,777 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:38:46,777 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:38:46,777 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:38:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-23 17:38:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 17:38:46,815 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:46,816 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:38:46,816 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash 305373308, now seen corresponding path program 1 times [2021-02-23 17:38:46,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:46,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335694442] [2021-02-23 17:38:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:46,997 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:47,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:47,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:47,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:47,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:47,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:47,524 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 17:38:47,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335694442] [2021-02-23 17:38:47,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:47,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:38:47,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664148677] [2021-02-23 17:38:47,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:38:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:38:47,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:38:47,561 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 6 states. [2021-02-23 17:38:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:48,091 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2021-02-23 17:38:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:38:48,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2021-02-23 17:38:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:48,105 INFO L225 Difference]: With dead ends: 97 [2021-02-23 17:38:48,105 INFO L226 Difference]: Without dead ends: 53 [2021-02-23 17:38:48,110 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 17:38:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-23 17:38:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-23 17:38:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-23 17:38:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-02-23 17:38:48,192 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 32 [2021-02-23 17:38:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:48,193 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-02-23 17:38:48,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:38:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-02-23 17:38:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 17:38:48,197 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:48,197 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-02-23 17:38:48,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:38:48,198 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:48,199 INFO L82 PathProgramCache]: Analyzing trace with hash -40053035, now seen corresponding path program 1 times [2021-02-23 17:38:48,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:48,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233356605] [2021-02-23 17:38:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:48,204 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:48,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:48,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:48,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:48,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-23 17:38:48,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233356605] [2021-02-23 17:38:48,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:48,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:38:48,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585739156] [2021-02-23 17:38:48,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:38:48,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:38:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:38:48,436 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 7 states. [2021-02-23 17:38:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:48,891 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-02-23 17:38:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:38:48,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2021-02-23 17:38:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:48,908 INFO L225 Difference]: With dead ends: 76 [2021-02-23 17:38:48,908 INFO L226 Difference]: Without dead ends: 70 [2021-02-23 17:38:48,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:38:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-23 17:38:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-02-23 17:38:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-02-23 17:38:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2021-02-23 17:38:48,949 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 42 [2021-02-23 17:38:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:48,950 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2021-02-23 17:38:48,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:38:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2021-02-23 17:38:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 17:38:48,953 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:48,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2021-02-23 17:38:48,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:38:48,954 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:48,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1011067684, now seen corresponding path program 2 times [2021-02-23 17:38:48,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:48,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973292324] [2021-02-23 17:38:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:48,959 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 17:38:49,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973292324] [2021-02-23 17:38:49,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:49,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 17:38:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248312819] [2021-02-23 17:38:49,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 17:38:49,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 17:38:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:38:49,103 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand 5 states. [2021-02-23 17:38:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:49,287 INFO L93 Difference]: Finished difference Result 123 states and 182 transitions. [2021-02-23 17:38:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 17:38:49,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2021-02-23 17:38:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:49,291 INFO L225 Difference]: With dead ends: 123 [2021-02-23 17:38:49,291 INFO L226 Difference]: Without dead ends: 74 [2021-02-23 17:38:49,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:38:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-23 17:38:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-02-23 17:38:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-23 17:38:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2021-02-23 17:38:49,339 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 52 [2021-02-23 17:38:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:49,340 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2021-02-23 17:38:49,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 17:38:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2021-02-23 17:38:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 17:38:49,351 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:49,351 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:38:49,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:38:49,352 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2141089131, now seen corresponding path program 1 times [2021-02-23 17:38:49,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:49,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394796574] [2021-02-23 17:38:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:49,357 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:49,419 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:38:49,464 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:38:49,506 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:38:49,506 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:38:49,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:38:49,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:38:49 BoogieIcfgContainer [2021-02-23 17:38:49,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:38:49,531 INFO L168 Benchmark]: Toolchain (without parser) took 3575.77 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 138.1 MB in the beginning and 126.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 45.8 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:49,531 INFO L168 Benchmark]: CDTParser took 1.09 ms. Allocated memory is still 162.5 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:38:49,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.92 ms. Allocated memory is still 162.5 MB. Free memory was 137.1 MB in the beginning and 127.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:49,533 INFO L168 Benchmark]: Boogie Preprocessor took 58.28 ms. Allocated memory is still 162.5 MB. Free memory was 127.7 MB in the beginning and 126.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:49,534 INFO L168 Benchmark]: RCFGBuilder took 365.27 ms. Allocated memory is still 162.5 MB. Free memory was 126.2 MB in the beginning and 110.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:49,535 INFO L168 Benchmark]: TraceAbstraction took 2858.51 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 110.0 MB in the beginning and 126.0 MB in the end (delta: -16.0 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:38:49,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.09 ms. Allocated memory is still 162.5 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.92 ms. Allocated memory is still 162.5 MB. Free memory was 137.1 MB in the beginning and 127.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.28 ms. Allocated memory is still 162.5 MB. Free memory was 127.7 MB in the beginning and 126.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 365.27 ms. Allocated memory is still 162.5 MB. Free memory was 126.2 MB in the beginning and 110.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2858.51 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 110.0 MB in the beginning and 126.0 MB in the end (delta: -16.0 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L28] int m = __VERIFIER_nondet_int(); [L29] COND FALSE !(m < 0 || m > 3) [L34] int n = __VERIFIER_nondet_int(); [L35] COND FALSE !(n < 0 || n > 23) [L41] CALL, EXPR ackermann(m,n) [L17] COND FALSE !(m==0) [L20] COND TRUE n==0 [L21] CALL, EXPR ackermann(m-1,1) [L17] COND FALSE !(m==0) [L20] COND FALSE !(n==0) [L23] CALL, EXPR ackermann(m,n-1) [L17] COND FALSE !(m==0) [L20] COND TRUE n==0 [L21] CALL, EXPR ackermann(m-1,1) [L17] COND TRUE m==0 [L18] return n+1; [L21] RET, EXPR ackermann(m-1,1) [L21] return ackermann(m-1,1); [L23] RET, EXPR ackermann(m,n-1) [L23] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) [L17] COND TRUE m==0 [L18] return n+1; [L23] RET, EXPR ackermann(m-1,ackermann(m,n-1)) [L23] return ackermann(m-1,ackermann(m,n-1)); [L21] RET, EXPR ackermann(m-1,1) [L21] return ackermann(m-1,1); [L41] RET, EXPR ackermann(m,n) [L41] int result = ackermann(m,n); [L42] COND FALSE !(m < 2 || result >= 4) [L45] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 192 SDslu, 117 SDs, 0 SdLazy, 354 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=3, 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, 0 StatesRemovedByMinimization, 0 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...