/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/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:11:26,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:11:26,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:11:26,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:11:26,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:11:26,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:11:26,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:11:26,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:11:26,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:11:26,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:11:26,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:11:26,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:11:26,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:11:26,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:11:26,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:11:26,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:11:26,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:11:26,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:11:26,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:11:26,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:11:26,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:11:26,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:11:26,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:11:26,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:11:26,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:11:26,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:11:26,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:11:26,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:11:26,263 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 20:11:26,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:11:26,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:11:26,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:11:26,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:11:26,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:11:26,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:11:26,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:11:26,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:11:26,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:11:26,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:11:26,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:11:26,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:11:26,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:11:26,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:11:26,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:11:26,296 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:11:26,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:11:26,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:11:26,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:11:26,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:11:26,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:11:26,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:11:26,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:11:26,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:11:26,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:11:26,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:11:26,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:11:26,826 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:11:26,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2021-02-21 20:11:26,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb4fd42c/a8ad8115139b4875a20759a1eb700a00/FLAGbd3bf20f0 [2021-02-21 20:11:27,646 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:11:27,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2021-02-21 20:11:27,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb4fd42c/a8ad8115139b4875a20759a1eb700a00/FLAGbd3bf20f0 [2021-02-21 20:11:28,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb4fd42c/a8ad8115139b4875a20759a1eb700a00 [2021-02-21 20:11:28,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:11:28,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:11:28,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:11:28,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:11:28,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:11:28,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5240fac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28, skipping insertion in model container [2021-02-21 20:11:28,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:11:28,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:11:28,253 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/Addition02.c[1124,1137] [2021-02-21 20:11:28,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:11:28,268 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:11:28,286 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/Addition02.c[1124,1137] [2021-02-21 20:11:28,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:11:28,304 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:11:28,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28 WrapperNode [2021-02-21 20:11:28,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:11:28,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:11:28,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:11:28,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:11:28,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (1/1) ... [2021-02-21 20:11:28,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:11:28,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:11:28,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:11:28,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:11:28,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (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 20:11:28,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:11:28,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:11:28,454 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:11:28,454 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-02-21 20:11:28,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:11:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:11:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:11:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:11:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:11:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:11:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-02-21 20:11:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:11:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:11:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:11:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:11:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:11:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:11:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:11:28,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:11:28,852 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:11:28,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:11:28 BoogieIcfgContainer [2021-02-21 20:11:28,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:11:28,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:11:28,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:11:28,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:11:28,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:11:28" (1/3) ... [2021-02-21 20:11:28,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b1e007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:11:28, skipping insertion in model container [2021-02-21 20:11:28,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:28" (2/3) ... [2021-02-21 20:11:28,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b1e007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:11:28, skipping insertion in model container [2021-02-21 20:11:28,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:11:28" (3/3) ... [2021-02-21 20:11:28,876 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition02.c [2021-02-21 20:11:28,893 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:11:28,907 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:11:28,951 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:11:28,995 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:11:28,996 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:11:28,996 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:11:28,996 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:11:28,996 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:11:28,996 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:11:28,997 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:11:28,997 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:11:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-21 20:11:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 20:11:29,039 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:29,040 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] [2021-02-21 20:11:29,041 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1808746938, now seen corresponding path program 1 times [2021-02-21 20:11:29,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:29,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722939443] [2021-02-21 20:11:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:29,160 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:29,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:29,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:29,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 20:11:29,548 WARN L141 QuantifierPusher]: treesize reduction 19, result has 40.6 percent of original size [2021-02-21 20:11:29,552 WARN L147 QuantifierPusher]: treesize reduction 19, result has 40.6 percent of original size 13 [2021-02-21 20:11:29,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:29,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:29,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:29,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:11:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:29,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:29,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:29,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:29,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:29,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:29,728 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 20:11:29,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722939443] [2021-02-21 20:11:29,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:29,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:11:29,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692172323] [2021-02-21 20:11:29,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:11:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:11:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:11:29,757 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 10 states. [2021-02-21 20:11:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:30,514 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-02-21 20:11:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 20:11:30,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2021-02-21 20:11:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:30,528 INFO L225 Difference]: With dead ends: 65 [2021-02-21 20:11:30,528 INFO L226 Difference]: Without dead ends: 45 [2021-02-21 20:11:30,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:11:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-21 20:11:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-02-21 20:11:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 20:11:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-02-21 20:11:30,594 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 32 [2021-02-21 20:11:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:30,595 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-02-21 20:11:30,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:11:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-02-21 20:11:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-21 20:11:30,598 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:30,598 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, 1] [2021-02-21 20:11:30,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:11:30,599 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:30,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1330986061, now seen corresponding path program 1 times [2021-02-21 20:11:30,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:30,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998805061] [2021-02-21 20:11:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:30,603 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:30,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:30,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:30,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:30,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:30,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:30,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:30,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:30,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:11:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:30,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:30,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:30,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:30,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:11:30,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:30,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:11:30,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:30,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:30,733 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 20:11:30,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998805061] [2021-02-21 20:11:30,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:30,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 20:11:30,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180285443] [2021-02-21 20:11:30,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 20:11:30,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 20:11:30,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:11:30,754 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2021-02-21 20:11:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:30,971 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-02-21 20:11:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 20:11:30,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2021-02-21 20:11:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:30,982 INFO L225 Difference]: With dead ends: 61 [2021-02-21 20:11:30,982 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 20:11:30,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:11:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 20:11:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-21 20:11:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 20:11:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-02-21 20:11:31,024 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2021-02-21 20:11:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:31,025 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-02-21 20:11:31,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 20:11:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-02-21 20:11:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-21 20:11:31,030 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:31,031 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] [2021-02-21 20:11:31,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:11:31,031 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1283201204, now seen corresponding path program 1 times [2021-02-21 20:11:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:31,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040862949] [2021-02-21 20:11:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:31,039 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:31,087 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:31,138 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:31,177 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:11:31,178 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:11:31,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:11:31,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:11:31 BoogieIcfgContainer [2021-02-21 20:11:31,203 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:11:31,204 INFO L168 Benchmark]: Toolchain (without parser) took 3170.35 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 129.4 MB in the beginning and 132.9 MB in the end (delta: -3.5 MB). Peak memory consumption was 28.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:31,206 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:11:31,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.94 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 119.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:31,209 INFO L168 Benchmark]: Boogie Preprocessor took 36.13 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 117.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:31,212 INFO L168 Benchmark]: RCFGBuilder took 514.56 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 132.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:31,213 INFO L168 Benchmark]: TraceAbstraction took 2343.43 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 132.4 MB in the beginning and 132.9 MB in the end (delta: -526.3 kB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:31,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.94 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 119.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.13 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 117.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 514.56 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 132.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2343.43 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 132.4 MB in the beginning and 132.9 MB in the end (delta: -526.3 kB). Peak memory consumption was 30.4 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: [L29] int m = __VERIFIER_nondet_int(); [L30] COND FALSE !(m < 0 || m > 1073741823) [L35] int n = __VERIFIER_nondet_int(); [L36] COND FALSE !(n < 0 || n > 1073741823) [L41] CALL, EXPR addition(m,n) [L16] COND FALSE !(n == 0) [L19] COND TRUE n > 0 [L20] CALL, EXPR addition(m+1, n-1) [L16] COND TRUE n == 0 [L17] return m; [L20] RET, EXPR addition(m+1, n-1) [L20] return addition(m+1, n-1); [L41] RET, EXPR addition(m,n) [L41] int result = addition(m,n); [L42] COND FALSE !(result == m - n) [L45] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 134 SDslu, 100 SDs, 0 SdLazy, 262 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 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...