/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 00:14:07,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 00:14:07,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 00:14:07,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 00:14:07,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 00:14:07,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 00:14:07,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 00:14:07,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 00:14:07,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 00:14:07,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 00:14:07,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 00:14:07,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 00:14:07,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 00:14:07,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 00:14:07,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 00:14:07,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 00:14:07,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 00:14:07,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 00:14:07,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 00:14:07,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 00:14:07,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 00:14:07,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 00:14:07,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 00:14:07,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 00:14:07,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 00:14:07,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 00:14:07,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 00:14:07,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 00:14:07,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 00:14:07,194 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 00:14:07,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 00:14:07,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 00:14:07,197 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 00:14:07,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 00:14:07,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 00:14:07,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 00:14:07,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 00:14:07,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 00:14:07,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 00:14:07,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 00:14:07,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 00:14:07,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 00:14:07,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 00:14:07,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 00:14:07,200 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 00:14:07,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 00:14:07,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 00:14:07,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 00:14:07,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 00:14:07,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 00:14:07,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 00:14:07,203 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-18 00:14:07,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 00:14:07,484 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 00:14:07,488 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 00:14:07,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 00:14:07,490 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 00:14:07,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-07-18 00:14:07,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/616ef6330/64352a03ede4406b830de3807fc48381/FLAGfe39c86b7 [2020-07-18 00:14:08,051 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 00:14:08,051 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-07-18 00:14:08,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/616ef6330/64352a03ede4406b830de3807fc48381/FLAGfe39c86b7 [2020-07-18 00:14:08,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/616ef6330/64352a03ede4406b830de3807fc48381 [2020-07-18 00:14:08,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 00:14:08,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 00:14:08,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 00:14:08,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 00:14:08,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 00:14:08,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dabab2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08, skipping insertion in model container [2020-07-18 00:14:08,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 00:14:08,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 00:14:08,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:14:08,655 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 00:14:08,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:14:08,686 INFO L208 MainTranslator]: Completed translation [2020-07-18 00:14:08,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08 WrapperNode [2020-07-18 00:14:08,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 00:14:08,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 00:14:08,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 00:14:08,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 00:14:08,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (1/1) ... [2020-07-18 00:14:08,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 00:14:08,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 00:14:08,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 00:14:08,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 00:14:08,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (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 [2020-07-18 00:14:08,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 00:14:08,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 00:14:08,870 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-18 00:14:08,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 00:14:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 00:14:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-18 00:14:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 00:14:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 00:14:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 00:14:09,059 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 00:14:09,060 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-18 00:14:09,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:14:09 BoogieIcfgContainer [2020-07-18 00:14:09,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 00:14:09,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 00:14:09,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 00:14:09,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 00:14:09,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 12:14:08" (1/3) ... [2020-07-18 00:14:09,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3102a767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:14:09, skipping insertion in model container [2020-07-18 00:14:09,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:08" (2/3) ... [2020-07-18 00:14:09,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3102a767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:14:09, skipping insertion in model container [2020-07-18 00:14:09,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:14:09" (3/3) ... [2020-07-18 00:14:09,073 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-07-18 00:14:09,098 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 00:14:09,110 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 00:14:09,125 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 00:14:09,158 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 00:14:09,158 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 00:14:09,159 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-18 00:14:09,159 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 00:14:09,159 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 00:14:09,160 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 00:14:09,160 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 00:14:09,160 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 00:14:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-18 00:14:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-18 00:14:09,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:14:09,191 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:14:09,192 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:14:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:14:09,201 INFO L82 PathProgramCache]: Analyzing trace with hash -611063963, now seen corresponding path program 1 times [2020-07-18 00:14:09,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:14:09,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835838193] [2020-07-18 00:14:09,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:14:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:09,466 INFO L280 TraceCheckUtils]: 0: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-18 00:14:09,466 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {22#true} {22#true} #22#return; {22#true} is VALID [2020-07-18 00:14:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:09,477 INFO L280 TraceCheckUtils]: 0: Hoare triple {22#true} ~n := #in~n; {22#true} is VALID [2020-07-18 00:14:09,478 INFO L280 TraceCheckUtils]: 1: Hoare triple {22#true} assume ~n < 3; {22#true} is VALID [2020-07-18 00:14:09,478 INFO L280 TraceCheckUtils]: 2: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-18 00:14:09,479 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {22#true} {23#false} #20#return; {23#false} is VALID [2020-07-18 00:14:09,479 INFO L263 TraceCheckUtils]: 0: Hoare triple {22#true} call ULTIMATE.init(); {22#true} is VALID [2020-07-18 00:14:09,479 INFO L280 TraceCheckUtils]: 1: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-18 00:14:09,480 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {22#true} {22#true} #22#return; {22#true} is VALID [2020-07-18 00:14:09,480 INFO L263 TraceCheckUtils]: 3: Hoare triple {22#true} call #t~ret1 := main(); {22#true} is VALID [2020-07-18 00:14:09,482 INFO L263 TraceCheckUtils]: 4: Hoare triple {22#true} call f(2); {26#(<= |f_#in~n| 2)} is VALID [2020-07-18 00:14:09,488 INFO L280 TraceCheckUtils]: 5: Hoare triple {26#(<= |f_#in~n| 2)} ~n := #in~n; {27#(<= f_~n 2)} is VALID [2020-07-18 00:14:09,491 INFO L280 TraceCheckUtils]: 6: Hoare triple {27#(<= f_~n 2)} assume !(~n < 3); {23#false} is VALID [2020-07-18 00:14:09,491 INFO L280 TraceCheckUtils]: 7: Hoare triple {23#false} #t~post0 := ~n; {23#false} is VALID [2020-07-18 00:14:09,492 INFO L280 TraceCheckUtils]: 8: Hoare triple {23#false} ~n := #t~post0 - 1; {23#false} is VALID [2020-07-18 00:14:09,492 INFO L280 TraceCheckUtils]: 9: Hoare triple {23#false} havoc #t~post0; {23#false} is VALID [2020-07-18 00:14:09,493 INFO L263 TraceCheckUtils]: 10: Hoare triple {23#false} call f(~n); {22#true} is VALID [2020-07-18 00:14:09,493 INFO L280 TraceCheckUtils]: 11: Hoare triple {22#true} ~n := #in~n; {22#true} is VALID [2020-07-18 00:14:09,494 INFO L280 TraceCheckUtils]: 12: Hoare triple {22#true} assume ~n < 3; {22#true} is VALID [2020-07-18 00:14:09,495 INFO L280 TraceCheckUtils]: 13: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-18 00:14:09,495 INFO L275 TraceCheckUtils]: 14: Hoare quadruple {22#true} {23#false} #20#return; {23#false} is VALID [2020-07-18 00:14:09,495 INFO L280 TraceCheckUtils]: 15: Hoare triple {23#false} assume !false; {23#false} is VALID [2020-07-18 00:14:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 00:14:09,508 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:14:09,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835838193] [2020-07-18 00:14:09,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 00:14:09,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-18 00:14:09,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320698196] [2020-07-18 00:14:09,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-18 00:14:09,524 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 00:14:09,528 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2020-07-18 00:14:09,541 WARN L140 InductivityCheck]: Transition 22#true ( _ , assume !false; , 23#false ) not inductive [2020-07-18 00:14:09,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 00:14:09,543 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inductivity failed at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.evaluateResult(InductivityCheck.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.checkInductivity(InductivityCheck.java:103) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.(InductivityCheck.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.constructInterpolantAutomaton(BasicCegarLoop.java:583) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:455) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-18 00:14:09,553 INFO L168 Benchmark]: Toolchain (without parser) took 1120.91 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 102.4 MB in the beginning and 145.8 MB in the end (delta: -43.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:09,554 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-18 00:14:09,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.87 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:09,556 INFO L168 Benchmark]: Boogie Preprocessor took 30.38 ms. Allocated memory is still 137.4 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:09,557 INFO L168 Benchmark]: RCFGBuilder took 345.42 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.8 MB in the beginning and 168.5 MB in the end (delta: -76.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:09,558 INFO L168 Benchmark]: TraceAbstraction took 483.90 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 145.8 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:09,563 INFO L336 ainManager$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 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.87 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.38 ms. Allocated memory is still 137.4 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.42 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.8 MB in the beginning and 168.5 MB in the end (delta: -76.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 483.90 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 145.8 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inductivity failed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inductivity failed: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.evaluateResult(InductivityCheck.java:142) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...