/usr/bin/java -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/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:18:49,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:18:49,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:18:49,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:18:49,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:18:49,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:18:49,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:18:49,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:18:49,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:18:49,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:18:49,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:18:49,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:18:49,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:18:49,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:18:49,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:18:49,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:18:49,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:18:49,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:18:49,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:18:49,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:18:49,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:18:49,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:18:49,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:18:49,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:18:49,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:18:49,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:18:49,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:18:49,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:18:49,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:18:49,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:18:49,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:18:49,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:18:49,425 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:18:49,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:18:49,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:18:49,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:18:49,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:18:49,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:18:49,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:18:49,427 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:18:49,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:18:49,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:18:49,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:18:49,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:18:49,428 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:18:49,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:18:49,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:18:49,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:18:49,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:18:49,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:18:49,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:18:49,429 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:18:49,723 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:18:49,741 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:18:49,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:18:49,746 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:18:49,746 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:18:49,747 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-07-07 13:18:49,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5704da10d/5c2000a405154733b3b35562aa181942/FLAG4ce66e3fc [2020-07-07 13:18:50,317 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:18:50,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-07-07 13:18:50,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5704da10d/5c2000a405154733b3b35562aa181942/FLAG4ce66e3fc [2020-07-07 13:18:50,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5704da10d/5c2000a405154733b3b35562aa181942 [2020-07-07 13:18:50,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:18:50,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:18:50,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:18:50,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:18:50,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:18:50,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b902dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50, skipping insertion in model container [2020-07-07 13:18:50,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:18:50,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:18:50,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:18:50,886 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:18:50,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:18:50,917 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:18:50,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50 WrapperNode [2020-07-07 13:18:50,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:18:50,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:18:50,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:18:50,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:18:50,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... [2020-07-07 13:18:50,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:18:50,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:18:50,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:18:50,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:18:50,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:18:51,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:18:51,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:18:51,110 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 13:18:51,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:18:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 13:18:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:18:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 13:18:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:18:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:18:51,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:18:51,277 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:18:51,278 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:18:51,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:18:51 BoogieIcfgContainer [2020-07-07 13:18:51,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:18:51,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:18:51,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:18:51,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:18:51,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:18:50" (1/3) ... [2020-07-07 13:18:51,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7ba914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:18:51, skipping insertion in model container [2020-07-07 13:18:51,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:18:50" (2/3) ... [2020-07-07 13:18:51,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7ba914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:18:51, skipping insertion in model container [2020-07-07 13:18:51,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:18:51" (3/3) ... [2020-07-07 13:18:51,290 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-07-07 13:18:51,301 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:18:51,309 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:18:51,324 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:18:51,346 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:18:51,346 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:18:51,347 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:18:51,347 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:18:51,347 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:18:51,347 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:18:51,347 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:18:51,348 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:18:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-07 13:18:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:18:51,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:18:51,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:18:51,372 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:18:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:18:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1651991454, now seen corresponding path program 1 times [2020-07-07 13:18:51,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:18:51,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234117239] [2020-07-07 13:18:51,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:18:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:18:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:18:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:18:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:18:51,794 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:18:51,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234117239] [2020-07-07 13:18:51,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:18:51,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:18:51,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771813119] [2020-07-07 13:18:51,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:18:51,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:18:51,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:18:51,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:18:51,823 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-07 13:18:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:18:51,917 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-07 13:18:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:18:51,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:18:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:18:51,934 INFO L225 Difference]: With dead ends: 37 [2020-07-07 13:18:51,934 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 13:18:51,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:18:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 13:18:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-07 13:18:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 13:18:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-07 13:18:51,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-07-07 13:18:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:18:51,988 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-07 13:18:51,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:18:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-07 13:18:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 13:18:51,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:18:51,991 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] [2020-07-07 13:18:51,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:18:51,992 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:18:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:18:51,992 INFO L82 PathProgramCache]: Analyzing trace with hash 189324707, now seen corresponding path program 1 times [2020-07-07 13:18:51,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:18:51,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186762955] [2020-07-07 13:18:51,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 5 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 5 to 7 Garbage collection #2: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 [2020-07-07 13:18:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:18:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:18:52,379 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:18:52,379 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:18:52,379 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:18:52,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:18:52,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:18:52 BoogieIcfgContainer [2020-07-07 13:18:52,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:18:52,399 INFO L168 Benchmark]: Toolchain (without parser) took 1720.65 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 100.9 MB in the beginning and 130.2 MB in the end (delta: -29.4 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:18:52,400 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 135.3 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:18:52,401 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.26 ms. Allocated memory is still 135.3 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:18:52,402 INFO L168 Benchmark]: Boogie Preprocessor took 23.33 ms. Allocated memory is still 135.3 MB. Free memory was 91.1 MB in the beginning and 89.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:18:52,403 INFO L168 Benchmark]: RCFGBuilder took 338.74 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 89.6 MB in the beginning and 168.8 MB in the end (delta: -79.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:18:52,404 INFO L168 Benchmark]: TraceAbstraction took 1113.97 ms. Allocated memory is still 200.3 MB. Free memory was 168.8 MB in the beginning and 130.2 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:18:52,409 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 135.3 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.26 ms. Allocated memory is still 135.3 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.33 ms. Allocated memory is still 135.3 MB. Free memory was 91.1 MB in the beginning and 89.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.74 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 89.6 MB in the beginning and 168.8 MB in the end (delta: -79.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1113.97 ms. Allocated memory is still 200.3 MB. Free memory was 168.8 MB in the beginning and 130.2 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 3 SDslu, 65 SDs, 0 SdLazy, 11 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: 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...