/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:28:00,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:28:00,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:28:00,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:28:00,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:28:00,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:28:00,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:28:00,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:28:00,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:28:00,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:28:00,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:28:00,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:28:00,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:28:00,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:28:00,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:28:00,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:28:00,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:28:00,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:28:00,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:28:00,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:28:00,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:28:00,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:28:00,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:28:00,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:28:00,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:28:00,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:28:00,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:28:00,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:28:00,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:28:00,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:28:00,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:28:00,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:28:00,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:28:00,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:28:00,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:28:00,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:28:00,408 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:28:00,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:28:00,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:28:00,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:28:00,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:28:00,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:28:00,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:28:00,410 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:28:00,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:28:00,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:28:00,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:28:00,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:28:00,836 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:28:00,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2020-10-23 20:28:00,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb113de0/c13319fae61f460797c467c2d2628437/FLAGa3b1600d2 [2020-10-23 20:28:01,506 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:28:01,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o3.c [2020-10-23 20:28:01,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb113de0/c13319fae61f460797c467c2d2628437/FLAGa3b1600d2 [2020-10-23 20:28:01,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb113de0/c13319fae61f460797c467c2d2628437 [2020-10-23 20:28:01,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:28:01,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:28:01,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:28:01,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:28:01,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:28:01,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:01" (1/1) ... [2020-10-23 20:28:01,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf1f6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:01, skipping insertion in model container [2020-10-23 20:28:01,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:01" (1/1) ... [2020-10-23 20:28:01,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:28:01,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:28:02,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:28:02,128 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:28:02,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:28:02,164 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:28:02,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02 WrapperNode [2020-10-23 20:28:02,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:28:02,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:28:02,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:28:02,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:28:02,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (1/1) ... [2020-10-23 20:28:02,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (1/1) ... [2020-10-23 20:28:02,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (1/1) ... [2020-10-23 20:28:02,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (1/1) ... [2020-10-23 20:28:02,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (1/1) ... [2020-10-23 20:28:02,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (1/1) ... [2020-10-23 20:28:02,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (1/1) ... [2020-10-23 20:28:02,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:28:02,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:28:02,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:28:02,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:28:02,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (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 20:28:02,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:28:02,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:28:02,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:28:02,283 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 20:28:02,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:28:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 20:28:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:28:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:28:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:28:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:28:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 20:28:02,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:28:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:28:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:28:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:28:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:28:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:28:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:28:02,522 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:28:02,522 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:28:02,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:02 BoogieIcfgContainer [2020-10-23 20:28:02,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:28:02,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:28:02,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:28:02,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:28:02,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:28:01" (1/3) ... [2020-10-23 20:28:02,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66349356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:02, skipping insertion in model container [2020-10-23 20:28:02,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:02" (2/3) ... [2020-10-23 20:28:02,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66349356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:02, skipping insertion in model container [2020-10-23 20:28:02,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:02" (3/3) ... [2020-10-23 20:28:02,534 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-10-23 20:28:02,548 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:28:02,554 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:28:02,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:28:02,609 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:28:02,609 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:28:02,609 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:28:02,610 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:28:02,610 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:28:02,610 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:28:02,610 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:28:02,610 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:28:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-23 20:28:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:28:02,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:02,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:02,677 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2039876327, now seen corresponding path program 1 times [2020-10-23 20:28:02,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:02,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007503617] [2020-10-23 20:28:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:02,781 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:28:03,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007503617] [2020-10-23 20:28:03,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:03,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:28:03,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793438237] [2020-10-23 20:28:03,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:28:03,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:03,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:28:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:28:03,337 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2020-10-23 20:28:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:03,776 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-23 20:28:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:28:03,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:28:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:03,788 INFO L225 Difference]: With dead ends: 50 [2020-10-23 20:28:03,789 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 20:28:03,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:28:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 20:28:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-23 20:28:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 20:28:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-23 20:28:03,863 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-23 20:28:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:03,864 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-23 20:28:03,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:28:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-23 20:28:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:28:03,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:03,867 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:03,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:28:03,868 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1789799325, now seen corresponding path program 1 times [2020-10-23 20:28:03,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494784165] [2020-10-23 20:28:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:03,874 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:28:04,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494784165] [2020-10-23 20:28:04,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:04,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:28:04,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556788686] [2020-10-23 20:28:04,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:28:04,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:28:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:28:04,214 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-23 20:28:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:04,728 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-23 20:28:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:28:04,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-23 20:28:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:04,731 INFO L225 Difference]: With dead ends: 41 [2020-10-23 20:28:04,731 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 20:28:04,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:28:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 20:28:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 20:28:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 20:28:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 20:28:04,757 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-23 20:28:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:04,758 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 20:28:04,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:28:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 20:28:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 20:28:04,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:04,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:04,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:28:04,763 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:04,764 INFO L82 PathProgramCache]: Analyzing trace with hash 819538851, now seen corresponding path program 2 times [2020-10-23 20:28:04,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:04,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356462934] [2020-10-23 20:28:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:04,772 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:28:05,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356462934] [2020-10-23 20:28:05,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:05,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:28:05,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959757340] [2020-10-23 20:28:05,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:28:05,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:05,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:28:05,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:28:05,118 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2020-10-23 20:28:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:05,741 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-23 20:28:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:28:05,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-23 20:28:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:05,743 INFO L225 Difference]: With dead ends: 45 [2020-10-23 20:28:05,743 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 20:28:05,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:28:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 20:28:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 20:28:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 20:28:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-23 20:28:05,757 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 39 [2020-10-23 20:28:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:05,757 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-23 20:28:05,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:28:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-23 20:28:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 20:28:05,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:05,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:05,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:28:05,760 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:05,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1214666029, now seen corresponding path program 3 times [2020-10-23 20:28:05,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:05,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874472975] [2020-10-23 20:28:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:05,764 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:28:05,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:28:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:28:05,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:28:05,846 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:28:05,846 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:28:05,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:28:05,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:28:05 BoogieIcfgContainer [2020-10-23 20:28:05,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:28:05,876 INFO L168 Benchmark]: Toolchain (without parser) took 3949.14 ms. Allocated memory was 157.3 MB in the beginning and 192.9 MB in the end (delta: 35.7 MB). Free memory was 133.2 MB in the beginning and 159.8 MB in the end (delta: -26.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:05,877 INFO L168 Benchmark]: CDTParser took 1.16 ms. Allocated memory is still 157.3 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:28:05,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.56 ms. Allocated memory is still 157.3 MB. Free memory was 132.8 MB in the beginning and 123.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:05,882 INFO L168 Benchmark]: Boogie Preprocessor took 33.45 ms. Allocated memory is still 157.3 MB. Free memory was 123.8 MB in the beginning and 122.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:05,884 INFO L168 Benchmark]: RCFGBuilder took 323.73 ms. Allocated memory is still 157.3 MB. Free memory was 122.3 MB in the beginning and 109.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:05,885 INFO L168 Benchmark]: TraceAbstraction took 3344.30 ms. Allocated memory was 157.3 MB in the beginning and 192.9 MB in the end (delta: 35.7 MB). Free memory was 109.2 MB in the beginning and 159.8 MB in the end (delta: -50.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:28:05,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.16 ms. Allocated memory is still 157.3 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.56 ms. Allocated memory is still 157.3 MB. Free memory was 132.8 MB in the beginning and 123.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.45 ms. Allocated memory is still 157.3 MB. Free memory was 123.8 MB in the beginning and 122.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 323.73 ms. Allocated memory is still 157.3 MB. Free memory was 122.3 MB in the beginning and 109.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3344.30 ms. Allocated memory was 157.3 MB in the beginning and 192.9 MB in the end (delta: 35.7 MB). Free memory was 109.2 MB in the beginning and 159.8 MB in the end (delta: -50.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 3 [L15] CALL reach_error() [L4] __assert_fail("0", "id_o3.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 69 SDslu, 241 SDs, 0 SdLazy, 304 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...