/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 0.2.0-b8ad66e [2020-10-23 17:57:30,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:57:30,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:57:30,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:57:30,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:57:30,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:57:30,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:57:30,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:57:30,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:57:30,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:57:30,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:57:30,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:57:30,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:57:30,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:57:30,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:57:30,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:57:30,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:57:30,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:57:30,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:57:30,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:57:30,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:57:30,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:57:30,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:57:30,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:57:30,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:57:30,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:57:30,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:57:30,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:57:30,662 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 [2020-10-23 17:57:30,723 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:57:30,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:57:30,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:57:30,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:57:30,729 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:57:30,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:57:30,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:57:30,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:57:30,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:57:30,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:57:30,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:57:30,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:57:30,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:57:30,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:57:30,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:57:30,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:57:30,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:57:30,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:57:30,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:57:30,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:57:30,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:57:30,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:57:30,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:57:30,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:57:30,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:57:30,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:57:30,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:57:30,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:57:30,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:57:30,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:57:31,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:57:31,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:57:31,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:57:31,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:57:31,134 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:57:31,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-10-23 17:57:31,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b20d3950a/10a2e994635f4ceba69017632e662159/FLAG8d78d2916 [2020-10-23 17:57:31,864 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:57:31,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2020-10-23 17:57:31,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b20d3950a/10a2e994635f4ceba69017632e662159/FLAG8d78d2916 [2020-10-23 17:57:32,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b20d3950a/10a2e994635f4ceba69017632e662159 [2020-10-23 17:57:32,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:57:32,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:57:32,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:32,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:57:32,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:57:32,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb9c2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32, skipping insertion in model container [2020-10-23 17:57:32,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:57:32,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:57:32,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:32,463 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:57:32,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:32,499 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:57:32,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32 WrapperNode [2020-10-23 17:57:32,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:32,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:57:32,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:57:32,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:57:32,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (1/1) ... [2020-10-23 17:57:32,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:57:32,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:57:32,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:57:32,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:57:32,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (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 [2020-10-23 17:57:32,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:57:32,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:57:32,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:57:32,624 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-10-23 17:57:32,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:57:32,624 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:57:32,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:57:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:57:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:57:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 17:57:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-10-23 17:57:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:57:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:57:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:57:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:57:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:57:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:57:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:57:33,090 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:57:33,090 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 17:57:33,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:33 BoogieIcfgContainer [2020-10-23 17:57:33,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:57:33,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:57:33,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:57:33,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:57:33,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:57:32" (1/3) ... [2020-10-23 17:57:33,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e806af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:33, skipping insertion in model container [2020-10-23 17:57:33,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:32" (2/3) ... [2020-10-23 17:57:33,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e806af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:33, skipping insertion in model container [2020-10-23 17:57:33,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:33" (3/3) ... [2020-10-23 17:57:33,105 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-10-23 17:57:33,119 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:57:33,124 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:57:33,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:57:33,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:57:33,194 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:57:33,194 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:57:33,194 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:57:33,195 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:57:33,195 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:57:33,195 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:57:33,195 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:57:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-23 17:57:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 17:57:33,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:33,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:33,221 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2040802546, now seen corresponding path program 1 times [2020-10-23 17:57:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:33,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820106084] [2020-10-23 17:57:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:57:33,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820106084] [2020-10-23 17:57:33,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:33,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:57:33,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127958146] [2020-10-23 17:57:33,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:57:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:57:33,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:57:33,821 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 7 states. [2020-10-23 17:57:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:34,260 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-10-23 17:57:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:57:34,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-23 17:57:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:34,273 INFO L225 Difference]: With dead ends: 44 [2020-10-23 17:57:34,273 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 17:57:34,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:57:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 17:57:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 17:57:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 17:57:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-23 17:57:34,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2020-10-23 17:57:34,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:34,329 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-23 17:57:34,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:57:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-23 17:57:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 17:57:34,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:34,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:34,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:57:34,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash -165285543, now seen corresponding path program 1 times [2020-10-23 17:57:34,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:34,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213774142] [2020-10-23 17:57:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:57:34,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213774142] [2020-10-23 17:57:34,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:34,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:57:34,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604105549] [2020-10-23 17:57:34,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:57:34,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:34,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:57:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:57:34,551 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-10-23 17:57:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:34,830 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-10-23 17:57:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:57:34,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-23 17:57:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:34,832 INFO L225 Difference]: With dead ends: 38 [2020-10-23 17:57:34,833 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 17:57:34,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:57:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 17:57:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 17:57:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 17:57:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 17:57:34,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-10-23 17:57:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:34,843 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 17:57:34,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:57:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 17:57:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 17:57:34,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:34,845 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, 1] [2020-10-23 17:57:34,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:57:34,845 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1241281567, now seen corresponding path program 1 times [2020-10-23 17:57:34,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:34,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880355938] [2020-10-23 17:57:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:57:34,871 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:57:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:57:34,906 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:57:34,945 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:57:34,945 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:57:34,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 17:57:34,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:57:34 BoogieIcfgContainer [2020-10-23 17:57:34,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:57:34,982 INFO L168 Benchmark]: Toolchain (without parser) took 2735.30 ms. Allocated memory was 158.3 MB in the beginning and 209.7 MB in the end (delta: 51.4 MB). Free memory was 133.1 MB in the beginning and 146.8 MB in the end (delta: -13.6 MB). Peak memory consumption was 39.3 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:34,983 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 158.3 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:57:34,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.10 ms. Allocated memory is still 158.3 MB. Free memory was 132.5 MB in the beginning and 123.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:34,985 INFO L168 Benchmark]: Boogie Preprocessor took 35.06 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 121.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:34,986 INFO L168 Benchmark]: RCFGBuilder took 556.24 ms. Allocated memory is still 158.3 MB. Free memory was 121.7 MB in the beginning and 107.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:34,987 INFO L168 Benchmark]: TraceAbstraction took 1883.67 ms. Allocated memory was 158.3 MB in the beginning and 209.7 MB in the end (delta: 51.4 MB). Free memory was 107.3 MB in the beginning and 146.8 MB in the end (delta: -39.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:34,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 158.3 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.10 ms. Allocated memory is still 158.3 MB. Free memory was 132.5 MB in the beginning and 123.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.06 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 121.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 556.24 ms. Allocated memory is still 158.3 MB. Free memory was 121.7 MB in the beginning and 107.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1883.67 ms. Allocated memory was 158.3 MB in the beginning and 209.7 MB in the end (delta: 51.4 MB). Free memory was 107.3 MB in the beginning and 146.8 MB in the end (delta: -39.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L3] __assert_fail("0", "Addition02.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 69 SDslu, 55 SDs, 0 SdLazy, 183 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 2952 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...