/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-72570d3 [2020-08-22 16:18:40,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:18:40,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:18:40,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:18:40,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:18:40,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:18:40,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:18:40,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:18:40,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:18:40,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:18:40,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:18:40,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:18:40,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:18:40,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:18:40,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:18:40,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:18:40,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:18:40,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:18:40,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:18:40,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:18:40,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:18:40,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:18:40,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:18:40,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:18:40,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:18:40,768 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 [2020-08-22 16:18:40,809 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:18:40,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:18:40,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:18:40,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:18:40,811 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:18:40,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:18:40,812 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:18:40,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:18:40,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:18:40,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:18:40,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:18:40,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:18:40,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:18:40,813 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:18:40,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:18:40,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:18:40,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:18:40,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:18:40,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:18:40,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:18:40,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:18:40,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:18:40,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:18:40,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:18:40,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:18:40,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:18:40,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:18:40,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:18:40,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:18:40,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:18:41,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:18:41,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:18:41,134 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:18:41,136 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:18:41,136 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:18:41,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-08-22 16:18:41,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663ae7886/b5d6e2d692794d25b4e71a78ce41b854/FLAG5ae46148e [2020-08-22 16:18:41,645 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:18:41,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2020-08-22 16:18:41,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663ae7886/b5d6e2d692794d25b4e71a78ce41b854/FLAG5ae46148e [2020-08-22 16:18:42,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/663ae7886/b5d6e2d692794d25b4e71a78ce41b854 [2020-08-22 16:18:42,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:18:42,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:18:42,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:42,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:18:42,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:18:42,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79230c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42, skipping insertion in model container [2020-08-22 16:18:42,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:18:42,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:18:42,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:42,286 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:18:42,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:42,311 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:18:42,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42 WrapperNode [2020-08-22 16:18:42,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:42,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:18:42,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:18:42,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:18:42,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (1/1) ... [2020-08-22 16:18:42,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:18:42,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:18:42,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:18:42,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:18:42,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (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 [2020-08-22 16:18:42,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:18:42,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:18:42,488 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-08-22 16:18:42,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:18:42,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:18:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:18:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-08-22 16:18:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:18:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:18:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:18:42,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:18:42,678 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:18:42,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:42 BoogieIcfgContainer [2020-08-22 16:18:42,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:18:42,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:18:42,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:18:42,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:18:42,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:18:42" (1/3) ... [2020-08-22 16:18:42,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e93137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:42, skipping insertion in model container [2020-08-22 16:18:42,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:42" (2/3) ... [2020-08-22 16:18:42,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e93137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:42, skipping insertion in model container [2020-08-22 16:18:42,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:42" (3/3) ... [2020-08-22 16:18:42,692 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-08-22 16:18:42,704 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:18:42,711 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:18:42,729 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:18:42,759 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:18:42,759 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:18:42,759 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:18:42,759 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:18:42,760 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:18:42,760 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:18:42,760 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:18:42,760 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:18:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-22 16:18:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:18:42,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:42,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:42,796 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-08-22 16:18:42,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:42,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829176053] [2020-08-22 16:18:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:18:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:43,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829176053] [2020-08-22 16:18:43,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:43,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:18:43,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768090884] [2020-08-22 16:18:43,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:18:43,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:18:43,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:18:43,163 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-08-22 16:18:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:43,330 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-08-22 16:18:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:43,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-08-22 16:18:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:43,344 INFO L225 Difference]: With dead ends: 38 [2020-08-22 16:18:43,345 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:18:43,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:18:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:18:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:18:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:18:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-08-22 16:18:43,399 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-08-22 16:18:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:43,399 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-08-22 16:18:43,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:18:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-08-22 16:18:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 16:18:43,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:43,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:43,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:18:43,403 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-08-22 16:18:43,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:43,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345280571] [2020-08-22 16:18:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:18:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:18:43,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345280571] [2020-08-22 16:18:43,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:43,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:18:43,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658722475] [2020-08-22 16:18:43,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:18:43,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:18:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:18:43,525 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-08-22 16:18:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:43,613 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-08-22 16:18:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:43,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-22 16:18:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:43,616 INFO L225 Difference]: With dead ends: 35 [2020-08-22 16:18:43,616 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:18:43,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:18:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:18:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:18:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:18:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 16:18:43,625 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-08-22 16:18:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:43,626 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 16:18:43,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:18:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 16:18:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:18:43,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:43,628 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] [2020-08-22 16:18:43,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:18:43,629 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-08-22 16:18:43,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:43,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545350940] [2020-08-22 16:18:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:18:43,652 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:18:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:18:43,672 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:18:43,700 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:18:43,700 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:18:43,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:18:43,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:18:43 BoogieIcfgContainer [2020-08-22 16:18:43,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:18:43,745 INFO L168 Benchmark]: Toolchain (without parser) took 1659.90 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 103.1 MB in the beginning and 105.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:43,748 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 120.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 16:18:43,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.81 ms. Allocated memory is still 147.8 MB. Free memory was 102.7 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:43,754 INFO L168 Benchmark]: Boogie Preprocessor took 113.21 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 183.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:43,756 INFO L168 Benchmark]: RCFGBuilder took 256.85 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 169.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:43,758 INFO L168 Benchmark]: TraceAbstraction took 1055.97 ms. Allocated memory is still 204.5 MB. Free memory was 169.9 MB in the beginning and 105.6 MB in the end (delta: 64.3 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:43,771 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 120.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.81 ms. Allocated memory is still 147.8 MB. Free memory was 102.7 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.21 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 183.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.85 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 169.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1055.97 ms. Allocated memory is still 204.5 MB. Free memory was 169.9 MB in the beginning and 105.6 MB in the end (delta: 64.3 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L27] int m = __VERIFIER_nondet_int(); [L28] COND FALSE !(m < 0 || m > 1073741823) [L33] int n = __VERIFIER_nondet_int(); [L34] COND FALSE !(n < 0 || n > 1073741823) VAL [m=0, n=1] [L39] CALL, EXPR addition(m,n) VAL [\old(m)=0, \old(n)=1] [L14] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L17] COND TRUE n > 0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L18] CALL, EXPR addition(m+1, n-1) VAL [\old(m)=1, \old(n)=0] [L14] COND TRUE n == 0 [L15] return m; VAL [\old(m)=1, \old(n)=0, \result=1, m=1, n=0] [L18] RET, EXPR addition(m+1, n-1) VAL [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1] [L18] return addition(m+1, n-1); [L39] RET, EXPR addition(m,n) VAL [addition(m,n)=1, m=0, n=1] [L39] int result = addition(m,n); [L40] COND FALSE !(result == m - n) VAL [m=0, n=1, result=1] [L43] __VERIFIER_error() VAL [m=0, n=1, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 33 SDslu, 96 SDs, 0 SdLazy, 116 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1644 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...