/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-simple/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:59:47,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:59:47,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:59:47,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:59:47,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:59:47,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:59:47,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:59:47,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:59:47,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:59:47,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:59:47,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:59:47,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:59:47,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:59:47,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:59:47,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:59:47,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:59:47,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:59:47,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:59:47,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:59:47,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:59:47,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:59:47,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:59:47,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:59:47,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:59:47,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:59:47,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:59:47,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:59:47,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:59:47,409 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 17:59:47,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:59:47,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:59:47,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:59:47,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:59:47,474 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:59:47,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:59:47,475 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:59:47,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:59:47,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:59:47,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:59:47,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:59:47,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:59:47,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:59:47,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:59:47,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:59:47,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:59:47,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:59:47,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:59:47,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:59:47,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:59:47,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:59:47,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:59:47,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:59:47,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:59:47,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:59:47,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:59:47,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:59:47,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:59:47,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:59:47,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:59:47,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:59:47,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:59:47,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:59:47,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:59:47,991 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:59:47,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-10-23 17:59:48,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028f676c4/52f8ed43eb0e4c5fb9a05199af536751/FLAGa66f7c271 [2020-10-23 17:59:48,735 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:59:48,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-10-23 17:59:48,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028f676c4/52f8ed43eb0e4c5fb9a05199af536751/FLAGa66f7c271 [2020-10-23 17:59:49,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028f676c4/52f8ed43eb0e4c5fb9a05199af536751 [2020-10-23 17:59:49,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:59:49,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:59:49,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:59:49,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:59:49,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:59:49,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5204e53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49, skipping insertion in model container [2020-10-23 17:59:49,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:59:49,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:59:49,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:59:49,308 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:59:49,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:59:49,345 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:59:49,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49 WrapperNode [2020-10-23 17:59:49,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:59:49,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:59:49,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:59:49,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:59:49,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (1/1) ... [2020-10-23 17:59:49,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:59:49,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:59:49,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:59:49,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:59:49,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (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 17:59:49,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:59:49,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:59:49,472 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:59:49,472 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-23 17:59:49,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:59:49,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:59:49,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:59:49,473 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:59:49,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:59:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-23 17:59:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:59:49,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:59:49,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:59:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:59:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:59:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:59:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:59:49,887 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:59:49,887 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 17:59:49,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:59:49 BoogieIcfgContainer [2020-10-23 17:59:49,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:59:49,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:59:49,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:59:49,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:59:49,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:59:49" (1/3) ... [2020-10-23 17:59:49,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaf976f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:59:49, skipping insertion in model container [2020-10-23 17:59:49,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:49" (2/3) ... [2020-10-23 17:59:49,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaf976f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:59:49, skipping insertion in model container [2020-10-23 17:59:49,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:59:49" (3/3) ... [2020-10-23 17:59:49,912 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-10-23 17:59:49,939 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:59:49,952 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:59:49,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:59:50,050 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:59:50,050 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:59:50,050 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:59:50,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:59:50,050 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:59:50,051 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:59:50,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:59:50,051 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:59:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-23 17:59:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 17:59:50,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:50,088 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:50,089 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:50,096 INFO L82 PathProgramCache]: Analyzing trace with hash -56492575, now seen corresponding path program 1 times [2020-10-23 17:59:50,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:50,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919940536] [2020-10-23 17:59:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:50,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:50,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:59:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:59:50,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919940536] [2020-10-23 17:59:50,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686628522] [2020-10-23 17:59:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:50,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 17:59:50,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:59:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:59:50,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:59:50,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-10-23 17:59:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285219970] [2020-10-23 17:59:50,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:59:50,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:59:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:59:50,655 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2020-10-23 17:59:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:50,704 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-23 17:59:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 17:59:50,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-23 17:59:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:50,713 INFO L225 Difference]: With dead ends: 29 [2020-10-23 17:59:50,713 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 17:59:50,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 17:59:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 17:59:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 17:59:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 17:59:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 17:59:50,750 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-10-23 17:59:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:50,750 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 17:59:50,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:59:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 17:59:50,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 17:59:50,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-23 17:59:50,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 17:59:50,998 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 17:59:50,999 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 17:59:50,999 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 17:59:50,999 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 17:59:51,000 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:59:51,000 INFO L277 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-10-23 17:59:51,000 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:59:51,000 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-23 17:59:51,000 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-10-23 17:59:51,001 INFO L274 CegarLoopResult]: For program point fEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-23 17:59:51,001 INFO L270 CegarLoopResult]: At program point L8-1(lines 5 10) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-10-23 17:59:51,001 INFO L274 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-10-23 17:59:51,001 INFO L277 CegarLoopResult]: At program point fENTRY(lines 5 10) the Hoare annotation is: true [2020-10-23 17:59:51,001 INFO L274 CegarLoopResult]: For program point fFINAL(lines 5 10) no Hoare annotation was computed. [2020-10-23 17:59:51,002 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:59:51,002 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 17:59:51,002 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 17:59:51,002 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:59:51,002 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 14) the Hoare annotation is: true [2020-10-23 17:59:51,002 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 14) no Hoare annotation was computed. [2020-10-23 17:59:51,003 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 14) no Hoare annotation was computed. [2020-10-23 17:59:51,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:59:51 BoogieIcfgContainer [2020-10-23 17:59:51,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:59:51,012 INFO L168 Benchmark]: Toolchain (without parser) took 1917.88 ms. Allocated memory is still 155.2 MB. Free memory was 130.0 MB in the beginning and 102.7 MB in the end (delta: 27.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:51,013 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:59:51,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.68 ms. Allocated memory is still 155.2 MB. Free memory was 129.5 MB in the beginning and 120.7 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:51,015 INFO L168 Benchmark]: Boogie Preprocessor took 31.62 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 119.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:51,016 INFO L168 Benchmark]: RCFGBuilder took 509.33 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 107.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:51,017 INFO L168 Benchmark]: TraceAbstraction took 1117.81 ms. Allocated memory is still 155.2 MB. Free memory was 107.0 MB in the beginning and 102.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:51,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.68 ms. Allocated memory is still 155.2 MB. Free memory was 129.5 MB in the beginning and 120.7 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.62 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 119.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 509.33 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 107.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1117.81 ms. Allocated memory is still 155.2 MB. Free memory was 107.0 MB in the beginning and 102.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 5 SDslu, 17 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 14 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 924 SizeOfPredicates, 1 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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 correct! Received shutdown request...