/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:21:19,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:21:19,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:21:19,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:21:19,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:21:19,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:21:19,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:21:19,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:21:19,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:21:19,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:21:19,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:21:19,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:21:19,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:21:19,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:21:19,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:21:19,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:21:19,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:21:19,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:21:19,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:21:19,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:21:19,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:21:19,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:21:19,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:21:19,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:21:19,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:21:19,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:21:19,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:21:19,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:21:19,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:21:19,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:21:19,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:21:19,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:21:19,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:21:19,346 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:21:19,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:21:19,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:21:19,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:21:19,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:21:19,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:21:19,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:21:19,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:21:19,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:21:19,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:21:19,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:21:19,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:21:19,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:21:19,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:21:19,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:21:19,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:21:19,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:21:19,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:21:19,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:21:19,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:21:19,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:21:19,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:21:19,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:21:19,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:21:19,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:21:19,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:21:19,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:21:19,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:21:19,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:21:19,806 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:21:19,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2021-02-19 17:21:19,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56784eed4/d8dc47e5c71a4f8a884ddb1c10775636/FLAG5946c3e0b [2021-02-19 17:21:20,458 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:21:20,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2021-02-19 17:21:20,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56784eed4/d8dc47e5c71a4f8a884ddb1c10775636/FLAG5946c3e0b [2021-02-19 17:21:20,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56784eed4/d8dc47e5c71a4f8a884ddb1c10775636 [2021-02-19 17:21:20,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:21:20,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:21:20,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:21:20,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:21:20,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:21:20,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:21:20" (1/1) ... [2021-02-19 17:21:20,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d2bf541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:20, skipping insertion in model container [2021-02-19 17:21:20,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:21:20" (1/1) ... [2021-02-19 17:21:20,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:21:20,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:21:21,002 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] [2021-02-19 17:21:21,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:21:21,016 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:21:21,035 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] [2021-02-19 17:21:21,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:21:21,052 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:21:21,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21 WrapperNode [2021-02-19 17:21:21,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:21:21,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:21:21,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:21:21,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:21:21,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (1/1) ... [2021-02-19 17:21:21,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (1/1) ... [2021-02-19 17:21:21,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (1/1) ... [2021-02-19 17:21:21,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (1/1) ... [2021-02-19 17:21:21,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (1/1) ... [2021-02-19 17:21:21,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (1/1) ... [2021-02-19 17:21:21,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (1/1) ... [2021-02-19 17:21:21,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:21:21,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:21:21,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:21:21,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:21:21,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (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 [2021-02-19 17:21:21,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:21:21,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:21:21,198 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:21:21,198 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-02-19 17:21:21,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:21:21,199 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:21:21,200 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:21:21,200 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:21:21,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:21:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:21:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-02-19 17:21:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:21:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:21:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:21:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:21:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:21:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:21:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:21:21,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:21:21,731 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:21:21,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:21:21 BoogieIcfgContainer [2021-02-19 17:21:21,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:21:21,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:21:21,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:21:21,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:21:21,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:21:20" (1/3) ... [2021-02-19 17:21:21,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e4144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:21:21, skipping insertion in model container [2021-02-19 17:21:21,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:21:21" (2/3) ... [2021-02-19 17:21:21,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e4144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:21:21, skipping insertion in model container [2021-02-19 17:21:21,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:21:21" (3/3) ... [2021-02-19 17:21:21,752 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition02.c [2021-02-19 17:21:21,769 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:21:21,779 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:21:21,821 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:21:21,872 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:21:21,872 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:21:21,872 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:21:21,872 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:21:21,872 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:21:21,872 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:21:21,873 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:21:21,873 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:21:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-02-19 17:21:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:21:21,905 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:21:21,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:21,907 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:21:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -125880268, now seen corresponding path program 1 times [2021-02-19 17:21:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:21,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447367024] [2021-02-19 17:21:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:22,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:22,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:22,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:22,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:22,254 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 17:21:22,255 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-19 17:21:22,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:22,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-19 17:21:22,314 WARN L141 QuantifierPusher]: treesize reduction 14, result has 58.8 percent of original size [2021-02-19 17:21:22,318 WARN L147 QuantifierPusher]: treesize reduction 14, result has 58.8 percent of original size 20 [2021-02-19 17:21:22,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:22,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:22,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:21:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:22,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:22,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:22,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-19 17:21:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:22,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:22,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:21:22,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:22,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:21:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:22,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447367024] [2021-02-19 17:21:22,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:21:22,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-19 17:21:22,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726648850] [2021-02-19 17:21:22,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:21:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:22,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:21:22,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:21:22,508 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2021-02-19 17:21:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:23,150 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-02-19 17:21:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:21:23,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-02-19 17:21:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:23,169 INFO L225 Difference]: With dead ends: 39 [2021-02-19 17:21:23,169 INFO L226 Difference]: Without dead ends: 25 [2021-02-19 17:21:23,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:21:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-02-19 17:21:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-02-19 17:21:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-19 17:21:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-02-19 17:21:23,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2021-02-19 17:21:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:23,250 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-02-19 17:21:23,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-19 17:21:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-02-19 17:21:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:21:23,253 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:21:23,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:23,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:21:23,254 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:21:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -943001011, now seen corresponding path program 1 times [2021-02-19 17:21:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:23,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118368465] [2021-02-19 17:21:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:23,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:23,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:23,354 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-19 17:21:23,356 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-19 17:21:23,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:23,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:23,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:21:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:23,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:21:23,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-19 17:21:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:23,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:21:23,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:21:23,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-19 17:21:23,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:21:23,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:21:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:23,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118368465] [2021-02-19 17:21:23,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:21:23,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 17:21:23,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733578438] [2021-02-19 17:21:23,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:21:23,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:21:23,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:21:23,497 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2021-02-19 17:21:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:23,764 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-02-19 17:21:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:21:23,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-02-19 17:21:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:23,766 INFO L225 Difference]: With dead ends: 36 [2021-02-19 17:21:23,766 INFO L226 Difference]: Without dead ends: 22 [2021-02-19 17:21:23,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:21:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-02-19 17:21:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-02-19 17:21:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-19 17:21:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-02-19 17:21:23,774 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-02-19 17:21:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:23,775 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-02-19 17:21:23,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-19 17:21:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-02-19 17:21:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:21:23,776 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:21:23,777 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] [2021-02-19 17:21:23,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:21:23,777 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:21:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash 12462718, now seen corresponding path program 1 times [2021-02-19 17:21:23,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:23,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381485136] [2021-02-19 17:21:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:21:23,821 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:21:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:21:23,861 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:21:23,890 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-19 17:21:23,890 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-19 17:21:23,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:21:23,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:21:23 BoogieIcfgContainer [2021-02-19 17:21:23,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:21:23,924 INFO L168 Benchmark]: Toolchain (without parser) took 3109.36 ms. Allocated memory is still 165.7 MB. Free memory was 141.3 MB in the beginning and 96.7 MB in the end (delta: 44.6 MB). Peak memory consumption was 45.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:21:23,925 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 165.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:21:23,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.93 ms. Allocated memory is still 165.7 MB. Free memory was 140.2 MB in the beginning and 130.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:21:23,926 INFO L168 Benchmark]: Boogie Preprocessor took 33.68 ms. Allocated memory is still 165.7 MB. Free memory was 130.2 MB in the beginning and 128.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-19 17:21:23,927 INFO L168 Benchmark]: RCFGBuilder took 645.04 ms. Allocated memory is still 165.7 MB. Free memory was 128.8 MB in the beginning and 146.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-02-19 17:21:23,928 INFO L168 Benchmark]: TraceAbstraction took 2188.16 ms. Allocated memory is still 165.7 MB. Free memory was 146.3 MB in the beginning and 96.7 MB in the end (delta: 49.6 MB). Peak memory consumption was 50.7 MB. Max. memory is 8.0 GB. [2021-02-19 17:21:23,932 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 165.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 226.93 ms. Allocated memory is still 165.7 MB. Free memory was 140.2 MB in the beginning and 130.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.68 ms. Allocated memory is still 165.7 MB. Free memory was 130.2 MB in the beginning and 128.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 645.04 ms. Allocated memory is still 165.7 MB. Free memory was 128.8 MB in the beginning and 146.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2188.16 ms. Allocated memory is still 165.7 MB. Free memory was 146.3 MB in the beginning and 96.7 MB in the end (delta: 49.6 MB). Peak memory consumption was 50.7 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) VAL [m=0, n=1] [L41] CALL, EXPR addition(m,n) VAL [\old(m)=0, \old(n)=1] [L16] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L19] COND TRUE n > 0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L20] CALL, EXPR addition(m+1, n-1) VAL [\old(m)=1, \old(n)=0] [L16] COND TRUE n == 0 [L17] return m; VAL [\old(m)=1, \old(n)=0, \result=1, m=1, n=0] [L20] RET, EXPR addition(m+1, n-1) VAL [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1] [L20] return addition(m+1, n-1); [L41] RET, EXPR addition(m,n) VAL [addition(m,n)=1, m=0, n=1] [L41] int result = addition(m,n); [L42] COND FALSE !(result == m - n) VAL [m=0, n=1, result=1] [L45] reach_error() VAL [m=0, n=1, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 70 SDslu, 48 SDs, 0 SdLazy, 189 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2797 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...