/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-36cd7be [2021-02-23 13:14:13,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:14:13,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:14:13,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:14:13,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:14:13,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:14:13,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:14:13,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:14:13,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:14:13,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:14:13,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:14:13,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:14:13,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:14:13,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:14:13,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:14:13,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:14:13,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:14:13,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:14:13,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:14:13,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:14:13,364 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 [2021-02-23 13:14:13,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:14:13,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:14:13,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:14:13,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:14:13,392 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:14:13,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:14:13,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:14:13,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:14:13,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:14:13,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:14:13,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:14:13,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:14:13,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:14:13,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:14:13,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:14:13,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:14:13,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:14:13,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:14:13,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:14:13,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:14:13,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:14:13,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:14:13,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:14:13,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:14:13,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:14:13,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:14:13,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:14:13,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:14:13,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:14:13,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:14:13,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:14:13,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:14:13,762 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:14:13,762 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:14:13,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2021-02-23 13:14:13,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f09c51e/80501f7c570d495bb773c5aa51d6b740/FLAG298806a06 [2021-02-23 13:14:14,448 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:14:14,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2021-02-23 13:14:14,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f09c51e/80501f7c570d495bb773c5aa51d6b740/FLAG298806a06 [2021-02-23 13:14:14,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f09c51e/80501f7c570d495bb773c5aa51d6b740 [2021-02-23 13:14:14,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:14:14,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:14:14,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:14:14,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:14:14,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:14:14,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:14:14" (1/1) ... [2021-02-23 13:14:14,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed57f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:14, skipping insertion in model container [2021-02-23 13:14:14,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:14:14" (1/1) ... [2021-02-23 13:14:14,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:14:14,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:14:15,019 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] [2021-02-23 13:14:15,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:14:15,034 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:14:15,052 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] [2021-02-23 13:14:15,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:14:15,068 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:14:15,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15 WrapperNode [2021-02-23 13:14:15,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:14:15,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:14:15,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:14:15,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:14:15,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (1/1) ... [2021-02-23 13:14:15,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (1/1) ... [2021-02-23 13:14:15,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (1/1) ... [2021-02-23 13:14:15,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (1/1) ... [2021-02-23 13:14:15,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (1/1) ... [2021-02-23 13:14:15,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (1/1) ... [2021-02-23 13:14:15,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (1/1) ... [2021-02-23 13:14:15,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:14:15,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:14:15,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:14:15,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:14:15,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (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 13:14:15,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:14:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:14:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:14:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-02-23 13:14:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:14:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:14:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:14:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:14:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:14:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:14:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-02-23 13:14:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:14:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:14:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:14:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:14:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:14:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:14:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:14:15,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:14:15,456 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 13:14:15,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:14:15 BoogieIcfgContainer [2021-02-23 13:14:15,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:14:15,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:14:15,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:14:15,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:14:15,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:14:14" (1/3) ... [2021-02-23 13:14:15,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2fd8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:14:15, skipping insertion in model container [2021-02-23 13:14:15,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:15" (2/3) ... [2021-02-23 13:14:15,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2fd8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:14:15, skipping insertion in model container [2021-02-23 13:14:15,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:14:15" (3/3) ... [2021-02-23 13:14:15,468 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition02.c [2021-02-23 13:14:15,475 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:14:15,480 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:14:15,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:14:15,591 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:14:15,595 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:14:15,595 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:14:15,595 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:14:15,596 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:14:15,596 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:14:15,596 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:14:15,596 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:14:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-02-23 13:14:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-23 13:14:15,624 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:14:15,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:14:15,626 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:14:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:14:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash -125880268, now seen corresponding path program 1 times [2021-02-23 13:14:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:14:15,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722928508] [2021-02-23 13:14:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:14:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:14:15,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:15,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,015 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-23 13:14:16,016 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-23 13:14:16,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 13:14:16,075 WARN L141 QuantifierPusher]: treesize reduction 14, result has 58.8 percent of original size [2021-02-23 13:14:16,078 WARN L147 QuantifierPusher]: treesize reduction 14, result has 58.8 percent of original size 20 [2021-02-23 13:14:16,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:14:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:14:16,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:14:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:14:16,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:14:16,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:14:16,201 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 13:14:16,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722928508] [2021-02-23 13:14:16,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:14:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 13:14:16,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215416802] [2021-02-23 13:14:16,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 13:14:16,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:14:16,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 13:14:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 13:14:16,227 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2021-02-23 13:14:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:14:16,601 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-02-23 13:14:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 13:14:16,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-02-23 13:14:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:14:16,615 INFO L225 Difference]: With dead ends: 39 [2021-02-23 13:14:16,615 INFO L226 Difference]: Without dead ends: 25 [2021-02-23 13:14:16,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-23 13:14:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-02-23 13:14:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-02-23 13:14:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-23 13:14:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-02-23 13:14:16,669 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2021-02-23 13:14:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:14:16,669 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-02-23 13:14:16,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 13:14:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-02-23 13:14:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:14:16,672 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:14:16,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:14:16,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:14:16,673 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:14:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:14:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash -943001011, now seen corresponding path program 1 times [2021-02-23 13:14:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:14:16,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875033341] [2021-02-23 13:14:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:14:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:14:16,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,724 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 13:14:16,725 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 13:14:16,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:14:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:14:16,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:14:16,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:14:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:14:16,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:14:16,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:14:16,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:14:16,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:14:16,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:14:16,856 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 13:14:16,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875033341] [2021-02-23 13:14:16,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:14:16,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 13:14:16,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129622505] [2021-02-23 13:14:16,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 13:14:16,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:14:16,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 13:14:16,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:14:16,861 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2021-02-23 13:14:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:14:17,128 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-02-23 13:14:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 13:14:17,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-02-23 13:14:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:14:17,130 INFO L225 Difference]: With dead ends: 36 [2021-02-23 13:14:17,130 INFO L226 Difference]: Without dead ends: 22 [2021-02-23 13:14:17,131 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 [2021-02-23 13:14:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-02-23 13:14:17,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-02-23 13:14:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-23 13:14:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-02-23 13:14:17,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-02-23 13:14:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:14:17,140 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-02-23 13:14:17,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 13:14:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-02-23 13:14:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:14:17,141 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:14:17,142 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] [2021-02-23 13:14:17,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:14:17,142 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:14:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:14:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash 12462718, now seen corresponding path program 1 times [2021-02-23 13:14:17,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:14:17,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666591468] [2021-02-23 13:14:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:14:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:14:17,169 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:14:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:14:17,192 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:14:17,221 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:14:17,222 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:14:17,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:14:17,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:14:17 BoogieIcfgContainer [2021-02-23 13:14:17,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:14:17,262 INFO L168 Benchmark]: Toolchain (without parser) took 2448.06 ms. Allocated memory was 160.4 MB in the beginning and 209.7 MB in the end (delta: 49.3 MB). Free memory was 134.7 MB in the beginning and 144.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2021-02-23 13:14:17,263 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 160.4 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:14:17,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.25 ms. Allocated memory is still 160.4 MB. Free memory was 133.7 MB in the beginning and 124.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:14:17,264 INFO L168 Benchmark]: Boogie Preprocessor took 32.41 ms. Allocated memory is still 160.4 MB. Free memory was 124.4 MB in the beginning and 123.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:14:17,265 INFO L168 Benchmark]: RCFGBuilder took 354.84 ms. Allocated memory is still 160.4 MB. Free memory was 123.0 MB in the beginning and 108.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:14:17,266 INFO L168 Benchmark]: TraceAbstraction took 1800.46 ms. Allocated memory was 160.4 MB in the beginning and 209.7 MB in the end (delta: 49.3 MB). Free memory was 108.3 MB in the beginning and 144.1 MB in the end (delta: -35.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:14:17,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 160.4 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.25 ms. Allocated memory is still 160.4 MB. Free memory was 133.7 MB in the beginning and 124.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.41 ms. Allocated memory is still 160.4 MB. Free memory was 124.4 MB in the beginning and 123.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 354.84 ms. Allocated memory is still 160.4 MB. Free memory was 123.0 MB in the beginning and 108.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1800.46 ms. Allocated memory was 160.4 MB in the beginning and 209.7 MB in the end (delta: 49.3 MB). Free memory was 108.3 MB in the beginning and 144.1 MB in the end (delta: -35.8 MB). Peak memory consumption was 14.7 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: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s 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, 0.4s 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...