/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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-d623d84 [2020-07-21 19:15:49,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:15:49,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:15:49,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:15:49,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:15:49,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:15:49,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:15:49,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:15:49,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:15:49,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:15:49,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:15:49,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:15:49,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:15:49,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:15:49,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:15:49,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:15:49,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:15:49,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:15:49,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:15:49,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:15:49,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:15:49,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:15:49,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:15:49,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:15:49,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 19:15:49,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 19:15:49,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 19:15:49,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 19:15:49,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 19:15:49,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 19:15:49,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 19:15:49,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 19:15:49,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 19:15:49,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 19:15:49,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 19:15:49,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 19:15:49,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 19:15:49,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 19:15:49,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:15:49,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:15:49,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:15:49,356 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 [2020-07-21 19:15:49,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:15:49,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:15:49,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:15:49,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:15:49,373 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:15:49,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:15:49,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:15:49,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:15:49,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:15:49,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:15:49,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:15:49,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:15:49,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:15:49,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:15:49,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:15:49,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:15:49,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:15:49,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:15:49,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:15:49,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:15:49,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:15:49,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:15:49,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:15:49,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:15:49,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:15:49,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:15:49,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:49,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:15:49,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:15:49,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:15:49,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:15:49,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:15:49,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:15:49,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:15:49,682 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:15:49,684 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-07-21 19:15:49,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc3d9c674/260580212a044c7fac45c85fd69d8def/FLAGc0f632851 [2020-07-21 19:15:50,212 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:15:50,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2020-07-21 19:15:50,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc3d9c674/260580212a044c7fac45c85fd69d8def/FLAGc0f632851 [2020-07-21 19:15:50,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc3d9c674/260580212a044c7fac45c85fd69d8def [2020-07-21 19:15:50,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:15:50,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:15:50,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:50,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:15:50,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:15:50,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7b22cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50, skipping insertion in model container [2020-07-21 19:15:50,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:15:50,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:15:50,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:50,787 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:15:50,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:50,814 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:15:50,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50 WrapperNode [2020-07-21 19:15:50,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:50,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:15:50,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:15:50,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:15:50,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (1/1) ... [2020-07-21 19:15:50,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:15:50,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:15:50,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:15:50,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:15:50,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (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 [2020-07-21 19:15:51,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:15:51,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:15:51,003 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-21 19:15:51,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:15:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:15:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:15:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-21 19:15:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:15:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:15:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:15:51,209 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:15:51,209 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:15:51,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:51 BoogieIcfgContainer [2020-07-21 19:15:51,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:15:51,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:15:51,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:15:51,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:15:51,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:15:50" (1/3) ... [2020-07-21 19:15:51,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245cc945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:51, skipping insertion in model container [2020-07-21 19:15:51,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:50" (2/3) ... [2020-07-21 19:15:51,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245cc945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:51, skipping insertion in model container [2020-07-21 19:15:51,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:51" (3/3) ... [2020-07-21 19:15:51,238 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-07-21 19:15:51,265 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:15:51,279 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:15:51,319 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:15:51,381 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:15:51,381 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:15:51,381 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:15:51,381 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:15:51,382 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:15:51,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:15:51,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:15:51,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:15:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 19:15:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 19:15:51,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:51,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:15:51,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:51,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-07-21 19:15:51,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:51,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640313796] [2020-07-21 19:15:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:51,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:51,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:51,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:15:51,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:15:51,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:15:51,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640313796] [2020-07-21 19:15:51,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:15:51,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 19:15:51,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617340485] [2020-07-21 19:15:51,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 19:15:51,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 19:15:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:15:51,722 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-07-21 19:15:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:51,863 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 19:15:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:15:51,865 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-21 19:15:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:51,877 INFO L225 Difference]: With dead ends: 40 [2020-07-21 19:15:51,877 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:15:51,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:15:51,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:15:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 19:15:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:15:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 19:15:51,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 19:15:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:51,934 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 19:15:51,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 19:15:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 19:15:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 19:15:51,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:51,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:15:52,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:52,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-07-21 19:15:52,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:52,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377189662] [2020-07-21 19:15:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:52,200 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:15:52,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:52,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 19:15:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:15:52,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:15:52,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377189662] [2020-07-21 19:15:52,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:15:52,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 19:15:52,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893211844] [2020-07-21 19:15:52,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 19:15:52,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:52,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 19:15:52,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:15:52,259 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 19:15:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:52,346 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-21 19:15:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:15:52,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-21 19:15:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:52,348 INFO L225 Difference]: With dead ends: 31 [2020-07-21 19:15:52,348 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 19:15:52,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:15:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 19:15:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 19:15:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:15:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 19:15:52,356 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-07-21 19:15:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:52,357 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 19:15:52,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 19:15:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 19:15:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 19:15:52,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:52,359 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] [2020-07-21 19:15:52,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:52,565 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:52,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:52,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-07-21 19:15:52,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:52,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133502988] [2020-07-21 19:15:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:52,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:52,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 19:15:52,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:15:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 19:15:52,626 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:15:52,641 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 19:15:52,641 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 19:15:52,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:52,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:15:52 BoogieIcfgContainer [2020-07-21 19:15:52,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:15:52,887 INFO L168 Benchmark]: Toolchain (without parser) took 2315.57 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 102.9 MB in the beginning and 100.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 60.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:52,888 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 19:15:52,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.08 ms. Allocated memory is still 145.2 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:52,890 INFO L168 Benchmark]: Boogie Preprocessor took 26.27 ms. Allocated memory is still 145.2 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:52,891 INFO L168 Benchmark]: RCFGBuilder took 374.04 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 169.7 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:52,892 INFO L168 Benchmark]: TraceAbstraction took 1664.58 ms. Allocated memory is still 202.9 MB. Free memory was 169.0 MB in the beginning and 100.4 MB in the end (delta: 68.6 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:52,896 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.08 ms. Allocated memory is still 145.2 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.27 ms. Allocated memory is still 145.2 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.04 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 169.7 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1664.58 ms. Allocated memory is still 202.9 MB. Free memory was 169.0 MB in the beginning and 100.4 MB in the end (delta: 68.6 MB). Peak memory consumption was 68.6 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: 1.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 36 SDslu, 93 SDs, 0 SdLazy, 110 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 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, 46 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1352 SizeOfPredicates, 7 NumberOfNonLiveVariables, 76 ConjunctsInSsa, 20 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...