/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_o20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:55:09,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:55:09,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:55:09,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:55:09,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:55:09,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:55:09,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:55:09,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:55:09,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:55:09,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:55:09,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:55:09,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:55:09,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:55:09,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:55:09,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:55:09,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:55:09,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:55:09,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:55:09,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:55:09,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:55:09,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:55:09,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:55:09,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:55:09,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:55:09,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:55:09,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:55:09,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:55:09,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:55:09,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:55:09,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:55:09,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:55:09,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:55:09,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:55:09,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:55:09,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:55:09,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:55:09,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:55:09,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:55:09,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:55:09,419 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:55:09,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:55:09,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:55:09,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:55:09,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:55:09,420 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:55:09,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:55:09,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:55:09,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:55:09,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:55:09,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:55:09,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:55:09,423 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:55:09,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:55:09,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:55:09,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:55:09,841 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:55:09,842 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:55:09,843 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-22 18:55:09,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe5a795f/789aab6aad424e7e949ff36ce4f32fb5/FLAG5309a3565 [2020-08-22 18:55:10,492 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:55:10,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-22 18:55:10,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe5a795f/789aab6aad424e7e949ff36ce4f32fb5/FLAG5309a3565 [2020-08-22 18:55:10,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe5a795f/789aab6aad424e7e949ff36ce4f32fb5 [2020-08-22 18:55:10,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:55:10,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:55:10,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:55:10,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:55:10,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:55:10,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:55:10" (1/1) ... [2020-08-22 18:55:10,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1617b53b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:10, skipping insertion in model container [2020-08-22 18:55:10,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:55:10" (1/1) ... [2020-08-22 18:55:10,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:55:10,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:55:11,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:55:11,114 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:55:11,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:55:11,149 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:55:11,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11 WrapperNode [2020-08-22 18:55:11,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:55:11,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:55:11,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:55:11,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:55:11,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (1/1) ... [2020-08-22 18:55:11,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (1/1) ... [2020-08-22 18:55:11,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (1/1) ... [2020-08-22 18:55:11,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (1/1) ... [2020-08-22 18:55:11,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (1/1) ... [2020-08-22 18:55:11,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (1/1) ... [2020-08-22 18:55:11,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (1/1) ... [2020-08-22 18:55:11,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:55:11,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:55:11,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:55:11,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:55:11,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (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 [2020-08-22 18:55:11,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:55:11,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:55:11,390 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 18:55:11,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:55:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 18:55:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:55:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 18:55:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:55:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:55:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:55:11,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:55:11,583 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:55:11,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:55:11 BoogieIcfgContainer [2020-08-22 18:55:11,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:55:11,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:55:11,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:55:11,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:55:11,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:55:10" (1/3) ... [2020-08-22 18:55:11,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f51cbe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:55:11, skipping insertion in model container [2020-08-22 18:55:11,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:55:11" (2/3) ... [2020-08-22 18:55:11,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f51cbe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:55:11, skipping insertion in model container [2020-08-22 18:55:11,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:55:11" (3/3) ... [2020-08-22 18:55:11,599 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2020-08-22 18:55:11,611 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:55:11,618 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:55:11,636 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:55:11,661 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:55:11,661 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:55:11,662 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:55:11,662 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:55:11,662 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:55:11,663 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:55:11,663 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:55:11,663 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:55:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 18:55:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:55:11,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:55:11,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:55:11,700 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:55:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:55:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1651991454, now seen corresponding path program 1 times [2020-08-22 18:55:11,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:55:11,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197474272] [2020-08-22 18:55:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:55:11,782 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:55:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:55:12,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:55:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:55:12,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:55:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:55:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:55:12,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197474272] [2020-08-22 18:55:12,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:55:12,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:55:12,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272626836] [2020-08-22 18:55:12,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:55:12,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:55:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:55:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:55:12,173 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-22 18:55:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:55:12,272 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-08-22 18:55:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:55:12,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 18:55:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:55:12,289 INFO L225 Difference]: With dead ends: 37 [2020-08-22 18:55:12,289 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 18:55:12,295 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 [2020-08-22 18:55:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 18:55:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 18:55:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 18:55:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-22 18:55:12,352 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-08-22 18:55:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:55:12,353 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-22 18:55:12,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:55:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-22 18:55:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 18:55:12,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:55:12,357 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] [2020-08-22 18:55:12,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:55:12,358 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:55:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:55:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash 189324707, now seen corresponding path program 1 times [2020-08-22 18:55:12,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:55:12,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601287575] [2020-08-22 18:55:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:55:13,168 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-08-22 18:55:13,207 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:55:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:55:13,239 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:55:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:55:13,264 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:55:13,288 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:55:13,289 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:55:13,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:55:13,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:55:13 BoogieIcfgContainer [2020-08-22 18:55:13,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:55:13,314 INFO L168 Benchmark]: Toolchain (without parser) took 2463.15 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 102.5 MB in the beginning and 130.0 MB in the end (delta: -27.4 MB). Peak memory consumption was 29.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:55:13,315 INFO L168 Benchmark]: CDTParser took 1.08 ms. Allocated memory is still 145.2 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 18:55:13,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.27 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 93.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:55:13,317 INFO L168 Benchmark]: Boogie Preprocessor took 35.65 ms. Allocated memory is still 145.2 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:55:13,319 INFO L168 Benchmark]: RCFGBuilder took 400.85 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 91.6 MB in the beginning and 170.2 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:55:13,320 INFO L168 Benchmark]: TraceAbstraction took 1721.69 ms. Allocated memory is still 201.9 MB. Free memory was 169.5 MB in the beginning and 130.0 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:55:13,325 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.08 ms. Allocated memory is still 145.2 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.27 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 93.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.65 ms. Allocated memory is still 145.2 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.85 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 91.6 MB in the beginning and 170.2 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1721.69 ms. Allocated memory is still 201.9 MB. Free memory was 169.5 MB in the beginning and 130.0 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 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 == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, 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...