/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/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:28:37,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:28:37,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:28:37,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:28:37,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:28:37,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:28:37,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:28:37,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:28:37,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:28:37,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:28:37,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:28:37,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:28:37,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:28:37,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:28:37,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:28:37,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:28:37,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:28:37,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:28:37,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:28:37,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:28:37,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:28:37,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:28:37,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:28:37,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:28:37,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:28:37,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:28:37,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:28:37,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:28:37,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:28:37,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:28:37,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:28:37,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:28:37,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:28:37,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:28:37,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:28:37,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:28:37,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:28:37,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:28:37,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:28:37,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:28:37,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:28:37,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:28:37,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:28:37,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:28:37,512 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:28:37,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:28:37,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:28:37,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:28:37,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:28:37,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:28:37,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:28:37,514 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:28:38,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:28:38,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:28:38,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:28:38,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:28:38,045 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:28:38,046 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-04 16:28:38,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5e93bd7e/2dec5a72a6694b578cf3b1db0bf9dfa0/FLAG4f479a8cc [2020-09-04 16:28:38,772 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:28:38,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-04 16:28:38,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5e93bd7e/2dec5a72a6694b578cf3b1db0bf9dfa0/FLAG4f479a8cc [2020-09-04 16:28:39,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5e93bd7e/2dec5a72a6694b578cf3b1db0bf9dfa0 [2020-09-04 16:28:39,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:28:39,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:28:39,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:28:39,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:28:39,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:28:39,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a430905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39, skipping insertion in model container [2020-09-04 16:28:39,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:28:39,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:28:39,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:28:39,438 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:28:39,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:28:39,498 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:28:39,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39 WrapperNode [2020-09-04 16:28:39,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:28:39,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:28:39,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:28:39,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:28:39,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... [2020-09-04 16:28:39,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:28:39,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:28:39,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:28:39,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:28:39,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:28:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:28:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:28:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 16:28:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-04 16:28:39,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:28:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 16:28:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:28:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 16:28:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-04 16:28:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:28:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:28:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:28:40,017 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:28:40,018 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:28:40,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:28:40 BoogieIcfgContainer [2020-09-04 16:28:40,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:28:40,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:28:40,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:28:40,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:28:40,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:28:39" (1/3) ... [2020-09-04 16:28:40,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27638402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:28:40, skipping insertion in model container [2020-09-04 16:28:40,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:28:39" (2/3) ... [2020-09-04 16:28:40,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27638402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:28:40, skipping insertion in model container [2020-09-04 16:28:40,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:28:40" (3/3) ... [2020-09-04 16:28:40,035 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-04 16:28:40,047 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:28:40,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:28:40,079 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:28:40,108 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:28:40,108 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:28:40,108 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:28:40,109 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:28:40,109 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:28:40,109 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:28:40,109 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:28:40,109 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:28:40,128 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-04 16:28:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 16:28:40,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:28:40,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:28:40,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:28:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:28:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-04 16:28:40,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:28:40,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243479837] [2020-09-04 16:28:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:28:40,245 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:28:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:40,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:28:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:40,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:28:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:28:40,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243479837] [2020-09-04 16:28:40,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:28:40,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:28:40,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525717908] [2020-09-04 16:28:40,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:28:40,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:28:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:28:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:28:40,651 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-04 16:28:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:28:40,772 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-04 16:28:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:28:40,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-04 16:28:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:28:40,787 INFO L225 Difference]: With dead ends: 51 [2020-09-04 16:28:40,788 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 16:28:40,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:28:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 16:28:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 16:28:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 16:28:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-04 16:28:40,849 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-04 16:28:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:28:40,850 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-04 16:28:40,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:28:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-04 16:28:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 16:28:40,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:28:40,853 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] [2020-09-04 16:28:40,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:28:40,854 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:28:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:28:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-04 16:28:40,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:28:40,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272330683] [2020-09-04 16:28:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:28:40,859 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:28:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:40,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:28:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:40,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:28:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:28:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:28:41,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272330683] [2020-09-04 16:28:41,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:28:41,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:28:41,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662754927] [2020-09-04 16:28:41,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:28:41,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:28:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:28:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:28:41,114 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-04 16:28:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:28:41,246 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-04 16:28:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:28:41,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-04 16:28:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:28:41,249 INFO L225 Difference]: With dead ends: 66 [2020-09-04 16:28:41,250 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 16:28:41,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:28:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 16:28:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-04 16:28:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 16:28:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-04 16:28:41,275 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-04 16:28:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:28:41,276 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-04 16:28:41,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:28:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-04 16:28:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 16:28:41,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:28:41,280 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, 1, 1] [2020-09-04 16:28:41,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:28:41,280 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:28:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:28:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-04 16:28:41,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:28:41,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556340646] [2020-09-04 16:28:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:28:41,315 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:28:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:28:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:28:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:28:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:28:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 16:28:41,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556340646] [2020-09-04 16:28:41,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:28:41,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:28:41,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825781067] [2020-09-04 16:28:41,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:28:41,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:28:41,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:28:41,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:28:41,588 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-09-04 16:28:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:28:41,658 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-04 16:28:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:28:41,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-04 16:28:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:28:41,661 INFO L225 Difference]: With dead ends: 69 [2020-09-04 16:28:41,661 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 16:28:41,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:28:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 16:28:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-04 16:28:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 16:28:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 16:28:41,679 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-04 16:28:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:28:41,679 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 16:28:41,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:28:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 16:28:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 16:28:41,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:28:41,682 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, 1, 1] [2020-09-04 16:28:41,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:28:41,682 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:28:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:28:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-09-04 16:28:41,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:28:41,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645031056] [2020-09-04 16:28:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:28:41,692 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:28:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:28:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:28:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:28:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:28:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:28:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 16:28:41,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645031056] [2020-09-04 16:28:41,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:28:41,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:28:41,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547769596] [2020-09-04 16:28:41,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:28:41,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:28:41,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:28:41,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:28:41,842 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-09-04 16:28:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:28:41,881 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-04 16:28:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:28:41,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-04 16:28:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:28:41,884 INFO L225 Difference]: With dead ends: 54 [2020-09-04 16:28:41,884 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 16:28:41,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:28:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 16:28:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-09-04 16:28:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 16:28:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 16:28:41,898 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-04 16:28:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:28:41,898 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 16:28:41,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:28:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 16:28:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 16:28:41,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:28:41,901 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, 1, 1] [2020-09-04 16:28:41,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:28:41,901 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:28:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:28:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-04 16:28:41,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:28:41,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666206994] [2020-09-04 16:28:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:28:41,910 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:28:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:28:41,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:28:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:28:41,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:28:41,975 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:28:41,976 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:28:41,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:28:42,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:28:42 BoogieIcfgContainer [2020-09-04 16:28:42,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:28:42,013 INFO L168 Benchmark]: Toolchain (without parser) took 2936.70 ms. Allocated memory was 135.8 MB in the beginning and 227.0 MB in the end (delta: 91.2 MB). Free memory was 100.6 MB in the beginning and 174.2 MB in the end (delta: -73.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:28:42,014 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 135.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-04 16:28:42,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.86 ms. Allocated memory is still 135.8 MB. Free memory was 100.2 MB in the beginning and 90.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:28:42,016 INFO L168 Benchmark]: Boogie Preprocessor took 164.35 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 178.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:28:42,017 INFO L168 Benchmark]: RCFGBuilder took 358.13 ms. Allocated memory is still 199.8 MB. Free memory was 178.4 MB in the beginning and 165.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:28:42,018 INFO L168 Benchmark]: TraceAbstraction took 1982.32 ms. Allocated memory was 199.8 MB in the beginning and 227.0 MB in the end (delta: 27.3 MB). Free memory was 164.2 MB in the beginning and 174.2 MB in the end (delta: -10.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:28:42,023 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 135.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 424.86 ms. Allocated memory is still 135.8 MB. Free memory was 100.2 MB in the beginning and 90.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.35 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 178.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.13 ms. Allocated memory is still 199.8 MB. Free memory was 178.4 MB in the beginning and 165.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1982.32 ms. Allocated memory was 199.8 MB in the beginning and 227.0 MB in the end (delta: 27.3 MB). Free memory was 164.2 MB in the beginning and 174.2 MB in the end (delta: -10.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 12 SDslu, 544 SDs, 0 SdLazy, 70 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 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...