/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 14:45:21,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 14:45:21,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 14:45:21,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 14:45:21,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 14:45:21,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 14:45:21,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 14:45:21,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 14:45:21,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 14:45:21,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 14:45:21,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 14:45:21,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-07-10 14:45:21,903 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 [2020-07-10 14:45:21,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 14:45:21,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 14:45:21,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-10 14:45:21,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-10 14:45:21,930 INFO L138 SettingsManager]: * Use SBE=true [2020-07-10 14:45:21,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 14:45:21,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 14:45:21,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 14:45:21,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 14:45:21,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 14:45:21,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 14:45:21,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 14:45:21,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 14:45:21,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 14:45:21,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 14:45:21,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 14:45:21,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 14:45:21,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 14:45:21,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-10 14:45:21,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 14:45:21,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 14:45:21,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 14:45:21,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 14:45:21,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-10 14:45:21,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-10 14:45:21,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-10 14:45:21,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-10 14:45:21,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 14:45:21,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-10 14:45:21,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-10 14:45:22,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 14:45:22,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 14:45:22,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 14:45:22,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 14:45:22,230 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 14:45:22,231 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-07-10 14:45:22,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eba930c5/5024139c849b47acbf735751f29deb01/FLAG059ad4f8b [2020-07-10 14:45:22,707 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 14:45:22,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-07-10 14:45:22,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eba930c5/5024139c849b47acbf735751f29deb01/FLAG059ad4f8b [2020-07-10 14:45:23,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eba930c5/5024139c849b47acbf735751f29deb01 [2020-07-10 14:45:23,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 14:45:23,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 14:45:23,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 14:45:23,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 14:45:23,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 14:45:23,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b80080d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23, skipping insertion in model container [2020-07-10 14:45:23,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 14:45:23,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 14:45:23,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 14:45:23,349 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 14:45:23,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 14:45:23,380 INFO L208 MainTranslator]: Completed translation [2020-07-10 14:45:23,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23 WrapperNode [2020-07-10 14:45:23,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 14:45:23,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 14:45:23,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 14:45:23,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 14:45:23,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (1/1) ... [2020-07-10 14:45:23,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 14:45:23,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 14:45:23,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 14:45:23,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 14:45:23,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (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 [2020-07-10 14:45:23,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 14:45:23,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 14:45:23,574 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-10 14:45:23,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 14:45:23,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 14:45:23,574 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-10 14:45:23,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 14:45:23,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 14:45:23,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 14:45:23,807 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 14:45:23,807 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 14:45:23,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 02:45:23 BoogieIcfgContainer [2020-07-10 14:45:23,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 14:45:23,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 14:45:23,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 14:45:23,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 14:45:23,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 02:45:23" (1/3) ... [2020-07-10 14:45:23,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b9d2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 02:45:23, skipping insertion in model container [2020-07-10 14:45:23,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 02:45:23" (2/3) ... [2020-07-10 14:45:23,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b9d2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 02:45:23, skipping insertion in model container [2020-07-10 14:45:23,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 02:45:23" (3/3) ... [2020-07-10 14:45:23,839 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-07-10 14:45:23,866 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-10 14:45:23,885 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 14:45:23,931 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 14:45:23,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 14:45:23,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 14:45:23,995 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-10 14:45:23,995 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 14:45:23,995 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 14:45:23,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 14:45:23,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 14:45:23,995 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 14:45:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-07-10 14:45:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 14:45:24,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 14:45:24,032 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 14:45:24,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 14:45:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 14:45:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1715138264, now seen corresponding path program 1 times [2020-07-10 14:45:24,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 14:45:24,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419296526] [2020-07-10 14:45:24,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 14:45:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 14:45:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 14:45:24,249 INFO L280 TraceCheckUtils]: 0: Hoare triple {19#true} assume true; {19#true} is VALID [2020-07-10 14:45:24,250 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {19#true} {19#true} #19#return; {19#true} is VALID [2020-07-10 14:45:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 14:45:24,261 INFO L280 TraceCheckUtils]: 0: Hoare triple {19#true} ~n := #in~n; {19#true} is VALID [2020-07-10 14:45:24,261 INFO L280 TraceCheckUtils]: 1: Hoare triple {19#true} assume ~n < 3; {19#true} is VALID [2020-07-10 14:45:24,262 INFO L280 TraceCheckUtils]: 2: Hoare triple {19#true} assume true; {19#true} is VALID [2020-07-10 14:45:24,262 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {19#true} {20#false} #17#return; {20#false} is VALID [2020-07-10 14:45:24,263 INFO L263 TraceCheckUtils]: 0: Hoare triple {19#true} call ULTIMATE.init(); {19#true} is VALID [2020-07-10 14:45:24,263 INFO L280 TraceCheckUtils]: 1: Hoare triple {19#true} assume true; {19#true} is VALID [2020-07-10 14:45:24,263 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {19#true} {19#true} #19#return; {19#true} is VALID [2020-07-10 14:45:24,264 INFO L263 TraceCheckUtils]: 3: Hoare triple {19#true} call #t~ret1 := main(); {19#true} is VALID [2020-07-10 14:45:24,267 INFO L263 TraceCheckUtils]: 4: Hoare triple {19#true} call f(2); {23#(<= |f_#in~n| 2)} is VALID [2020-07-10 14:45:24,268 INFO L280 TraceCheckUtils]: 5: Hoare triple {23#(<= |f_#in~n| 2)} ~n := #in~n; {24#(<= f_~n 2)} is VALID [2020-07-10 14:45:24,270 INFO L280 TraceCheckUtils]: 6: Hoare triple {24#(<= f_~n 2)} assume !(~n < 3);#t~post0 := ~n;~n := #t~post0 - 1;havoc #t~post0; {20#false} is VALID [2020-07-10 14:45:24,270 INFO L263 TraceCheckUtils]: 7: Hoare triple {20#false} call f(~n); {20#false} is VALID [2020-07-10 14:45:24,270 INFO L280 TraceCheckUtils]: 8: Hoare triple {20#false} ~n := #in~n; {20#false} is VALID [2020-07-10 14:45:24,271 INFO L280 TraceCheckUtils]: 9: Hoare triple {20#false} assume !(~n < 3);#t~post0 := ~n;~n := #t~post0 - 1;havoc #t~post0; {20#false} is VALID [2020-07-10 14:45:24,271 INFO L263 TraceCheckUtils]: 10: Hoare triple {20#false} call f(~n); {19#true} is VALID [2020-07-10 14:45:24,271 INFO L280 TraceCheckUtils]: 11: Hoare triple {19#true} ~n := #in~n; {19#true} is VALID [2020-07-10 14:45:24,272 INFO L280 TraceCheckUtils]: 12: Hoare triple {19#true} assume ~n < 3; {19#true} is VALID [2020-07-10 14:45:24,272 INFO L280 TraceCheckUtils]: 13: Hoare triple {19#true} assume true; {19#true} is VALID [2020-07-10 14:45:24,272 INFO L275 TraceCheckUtils]: 14: Hoare quadruple {19#true} {20#false} #17#return; {20#false} is VALID [2020-07-10 14:45:24,273 INFO L280 TraceCheckUtils]: 15: Hoare triple {20#false} assume !false; {20#false} is VALID [2020-07-10 14:45:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-10 14:45:24,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419296526] [2020-07-10 14:45:24,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206628861] [2020-07-10 14:45:24,277 INFO L94 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 [2020-07-10 14:45:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 14:45:24,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-10 14:45:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 14:45:24,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-10 14:45:24,421 INFO L263 TraceCheckUtils]: 0: Hoare triple {19#true} call ULTIMATE.init(); {19#true} is VALID [2020-07-10 14:45:24,422 INFO L280 TraceCheckUtils]: 1: Hoare triple {19#true} assume true; {19#true} is VALID [2020-07-10 14:45:24,422 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {19#true} {19#true} #19#return; {19#true} is VALID [2020-07-10 14:45:24,423 INFO L263 TraceCheckUtils]: 3: Hoare triple {19#true} call #t~ret1 := main(); {19#true} is VALID [2020-07-10 14:45:24,424 INFO L263 TraceCheckUtils]: 4: Hoare triple {19#true} call f(2); {23#(<= |f_#in~n| 2)} is VALID [2020-07-10 14:45:24,426 INFO L280 TraceCheckUtils]: 5: Hoare triple {23#(<= |f_#in~n| 2)} ~n := #in~n; {24#(<= f_~n 2)} is VALID [2020-07-10 14:45:24,428 INFO L280 TraceCheckUtils]: 6: Hoare triple {24#(<= f_~n 2)} assume !(~n < 3);#t~post0 := ~n;~n := #t~post0 - 1;havoc #t~post0; {20#false} is VALID [2020-07-10 14:45:24,428 INFO L263 TraceCheckUtils]: 7: Hoare triple {20#false} call f(~n); {20#false} is VALID [2020-07-10 14:45:24,429 INFO L280 TraceCheckUtils]: 8: Hoare triple {20#false} ~n := #in~n; {20#false} is VALID [2020-07-10 14:45:24,429 INFO L280 TraceCheckUtils]: 9: Hoare triple {20#false} assume !(~n < 3);#t~post0 := ~n;~n := #t~post0 - 1;havoc #t~post0; {20#false} is VALID [2020-07-10 14:45:24,429 INFO L263 TraceCheckUtils]: 10: Hoare triple {20#false} call f(~n); {20#false} is VALID [2020-07-10 14:45:24,430 INFO L280 TraceCheckUtils]: 11: Hoare triple {20#false} ~n := #in~n; {20#false} is VALID [2020-07-10 14:45:24,430 INFO L280 TraceCheckUtils]: 12: Hoare triple {20#false} assume ~n < 3; {20#false} is VALID [2020-07-10 14:45:24,431 INFO L280 TraceCheckUtils]: 13: Hoare triple {20#false} assume true; {20#false} is VALID [2020-07-10 14:45:24,431 INFO L275 TraceCheckUtils]: 14: Hoare quadruple {20#false} {20#false} #17#return; {20#false} is VALID [2020-07-10 14:45:24,431 INFO L280 TraceCheckUtils]: 15: Hoare triple {20#false} assume !false; {20#false} is VALID [2020-07-10 14:45:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-10 14:45:24,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-10 14:45:24,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2020-07-10 14:45:24,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160873758] [2020-07-10 14:45:24,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-10 14:45:24,446 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 14:45:24,450 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2020-07-10 14:45:24,480 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 14:45:24,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-10 14:45:24,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-10 14:45:24,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-10 14:45:24,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-10 14:45:24,494 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-07-10 14:45:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 14:45:24,586 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-07-10 14:45:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-10 14:45:24,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-10 14:45:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 14:45:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-10 14:45:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2020-07-10 14:45:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-10 14:45:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2020-07-10 14:45:24,608 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 25 transitions. [2020-07-10 14:45:24,650 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 25 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 14:45:24,658 INFO L225 Difference]: With dead ends: 24 [2020-07-10 14:45:24,658 INFO L226 Difference]: Without dead ends: 0 [2020-07-10 14:45:24,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-10 14:45:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-10 14:45:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-10 14:45:24,686 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 14:45:24,687 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2020-07-10 14:45:24,688 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-10 14:45:24,688 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-10 14:45:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 14:45:24,689 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-10 14:45:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-10 14:45:24,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 14:45:24,689 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 14:45:24,689 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-10 14:45:24,690 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-10 14:45:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 14:45:24,690 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-10 14:45:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-10 14:45:24,691 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 14:45:24,691 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 14:45:24,691 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 14:45:24,691 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 14:45:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-10 14:45:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-10 14:45:24,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-10 14:45:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 14:45:24,694 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-10 14:45:24,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-10 14:45:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-10 14:45:24,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 14:45:24,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-10 14:45:24,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-10 14:45:24,944 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-10 14:45:24,944 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-10 14:45:24,944 INFO L268 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-10 14:45:24,945 INFO L268 CegarLoopResult]: For program point fEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-10 14:45:24,945 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-07-10 14:45:24,945 INFO L271 CegarLoopResult]: At program point fENTRY(lines 3 8) the Hoare annotation is: true [2020-07-10 14:45:24,945 INFO L268 CegarLoopResult]: For program point L6-1(lines 3 8) no Hoare annotation was computed. [2020-07-10 14:45:24,945 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-10 14:45:24,946 INFO L268 CegarLoopResult]: For program point fFINAL(lines 3 8) no Hoare annotation was computed. [2020-07-10 14:45:24,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-10 14:45:24,946 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-10 14:45:24,946 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-10 14:45:24,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-10 14:45:24,947 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 12) the Hoare annotation is: true [2020-07-10 14:45:24,947 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 12) no Hoare annotation was computed. [2020-07-10 14:45:24,947 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 12) no Hoare annotation was computed. [2020-07-10 14:45:24,952 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-10 14:45:24,952 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-10 14:45:24,952 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-10 14:45:24,952 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-10 14:45:24,952 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-10 14:45:24,953 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-10 14:45:24,953 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-10 14:45:24,953 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-10 14:45:24,953 WARN L170 areAnnotationChecker]: fFINAL has no Hoare annotation [2020-07-10 14:45:24,953 WARN L170 areAnnotationChecker]: L6-1 has no Hoare annotation [2020-07-10 14:45:24,954 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-10 14:45:24,954 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-10 14:45:24,954 WARN L170 areAnnotationChecker]: fEXIT has no Hoare annotation [2020-07-10 14:45:24,954 WARN L170 areAnnotationChecker]: fEXIT has no Hoare annotation [2020-07-10 14:45:24,954 WARN L170 areAnnotationChecker]: L6-1 has no Hoare annotation [2020-07-10 14:45:24,954 WARN L170 areAnnotationChecker]: L6-1 has no Hoare annotation [2020-07-10 14:45:24,955 INFO L163 areAnnotationChecker]: CFG has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-10 14:45:24,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.07 02:45:24 BoogieIcfgContainer [2020-07-10 14:45:24,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-10 14:45:24,961 INFO L168 Benchmark]: Toolchain (without parser) took 1804.32 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 102.4 MB in the beginning and 107.2 MB in the end (delta: -4.9 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. [2020-07-10 14:45:24,962 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-10 14:45:24,963 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.06 ms. Allocated memory is still 146.3 MB. Free memory was 102.1 MB in the beginning and 93.2 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-07-10 14:45:24,964 INFO L168 Benchmark]: Boogie Preprocessor took 28.50 ms. Allocated memory is still 146.3 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-10 14:45:24,965 INFO L168 Benchmark]: RCFGBuilder took 406.62 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 169.4 MB in the end (delta: -77.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-10 14:45:24,966 INFO L168 Benchmark]: TraceAbstraction took 1139.85 ms. Allocated memory is still 202.9 MB. Free memory was 169.4 MB in the beginning and 107.2 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-07-10 14:45:24,970 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.06 ms. Allocated memory is still 146.3 MB. Free memory was 102.1 MB in the beginning and 93.2 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.50 ms. Allocated memory is still 146.3 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.62 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 169.4 MB in the end (delta: -77.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1139.85 ms. Allocated memory is still 202.9 MB. Free memory was 169.4 MB in the beginning and 107.2 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 4 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 6 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 570 SizeOfPredicates, 1 NumberOfNonLiveVariables, 38 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 10/14 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...