/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 0.1.25-72570d3 [2020-08-22 18:49:00,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:49:00,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:49:00,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:49:00,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:49:00,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:49:00,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:49:00,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:49:00,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:49:00,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:49:00,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:49:00,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:49:00,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:49:00,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:49:00,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:49:00,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:49:00,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:49:00,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:49:00,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:49:00,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:49:00,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:49:00,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:49:00,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:49:00,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:49:00,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:49:00,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:49:00,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:49:00,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:49:00,906 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 18:49:00,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:49:00,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:49:00,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:49:00,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:49:00,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:49:00,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:49:00,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:49:00,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:49:00,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:49:00,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:49:00,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:49:00,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:49:00,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:49:00,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:49:00,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:49:00,923 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:49:00,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:49:00,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:49:00,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:49:00,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:49:00,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:49:00,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:49:00,927 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:49:01,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:49:01,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:49:01,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:49:01,223 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:49:01,231 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:49:01,232 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-22 18:49:01,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb5c5614/1c4e5e7920334daea5c802fa7034cfb4/FLAGe416ba8d9 [2020-08-22 18:49:01,796 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:49:01,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-22 18:49:01,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb5c5614/1c4e5e7920334daea5c802fa7034cfb4/FLAGe416ba8d9 [2020-08-22 18:49:02,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb5c5614/1c4e5e7920334daea5c802fa7034cfb4 [2020-08-22 18:49:02,178 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:49:02,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:49:02,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:02,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:49:02,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:49:02,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c05805a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02, skipping insertion in model container [2020-08-22 18:49:02,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:49:02,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:49:02,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:02,407 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:49:02,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:02,440 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:49:02,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02 WrapperNode [2020-08-22 18:49:02,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:02,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:49:02,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:49:02,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:49:02,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... [2020-08-22 18:49:02,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:49:02,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:49:02,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:49:02,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:49:02,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:49:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:49:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:49:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 18:49:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 18:49:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:49:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 18:49:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:49:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 18:49:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 18:49:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:49:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:49:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:49:02,821 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:49:02,821 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:49:02,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:02 BoogieIcfgContainer [2020-08-22 18:49:02,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:49:02,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:49:02,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:49:02,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:49:02,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:49:02" (1/3) ... [2020-08-22 18:49:02,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c096105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:02, skipping insertion in model container [2020-08-22 18:49:02,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:02" (2/3) ... [2020-08-22 18:49:02,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c096105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:02, skipping insertion in model container [2020-08-22 18:49:02,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:02" (3/3) ... [2020-08-22 18:49:02,833 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-08-22 18:49:02,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:49:02,851 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:49:02,863 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:49:02,883 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:49:02,884 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:49:02,884 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:49:02,884 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:49:02,884 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:49:02,885 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:49:02,885 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:49:02,885 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:49:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 18:49:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:49:02,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:02,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:02,908 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-08-22 18:49:02,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:02,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238743194] [2020-08-22 18:49:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:02,972 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,186 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 18:49:03,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238743194] [2020-08-22 18:49:03,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:03,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:03,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608512306] [2020-08-22 18:49:03,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:03,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:03,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:03,225 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-08-22 18:49:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:03,319 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-22 18:49:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:03,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 18:49:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:03,333 INFO L225 Difference]: With dead ends: 51 [2020-08-22 18:49:03,334 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 18:49:03,337 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 [2020-08-22 18:49:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 18:49:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 18:49:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 18:49:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-22 18:49:03,393 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-08-22 18:49:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:03,394 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-22 18:49:03,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-22 18:49:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 18:49:03,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:03,397 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] [2020-08-22 18:49:03,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:49:03,398 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-08-22 18:49:03,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:03,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566137023] [2020-08-22 18:49:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:03,402 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,661 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 18:49:03,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566137023] [2020-08-22 18:49:03,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:03,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:49:03,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409545747] [2020-08-22 18:49:03,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:49:03,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:49:03,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:49:03,665 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-22 18:49:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:03,790 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-08-22 18:49:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:49:03,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-22 18:49:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:03,793 INFO L225 Difference]: With dead ends: 66 [2020-08-22 18:49:03,794 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 18:49:03,796 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 [2020-08-22 18:49:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 18:49:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 18:49:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 18:49:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-22 18:49:03,811 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-08-22 18:49:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:03,811 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-22 18:49:03,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:49:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-22 18:49:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:03,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:03,814 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] [2020-08-22 18:49:03,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:49:03,815 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-08-22 18:49:03,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:03,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585307192] [2020-08-22 18:49:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:03,846 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:03,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:04,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585307192] [2020-08-22 18:49:04,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:04,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:04,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123172531] [2020-08-22 18:49:04,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:04,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:04,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:04,060 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-08-22 18:49:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:04,128 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 18:49:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:04,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 18:49:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:04,131 INFO L225 Difference]: With dead ends: 69 [2020-08-22 18:49:04,131 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 18:49:04,132 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 [2020-08-22 18:49:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 18:49:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 18:49:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 18:49:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 18:49:04,147 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 18:49:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:04,148 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 18:49:04,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 18:49:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:04,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:04,150 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] [2020-08-22 18:49:04,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:49:04,151 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-08-22 18:49:04,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:04,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121721578] [2020-08-22 18:49:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:04,160 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:04,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121721578] [2020-08-22 18:49:04,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:04,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:04,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369728722] [2020-08-22 18:49:04,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:04,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:04,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:04,344 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-08-22 18:49:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:04,393 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-08-22 18:49:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:04,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 18:49:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:04,395 INFO L225 Difference]: With dead ends: 54 [2020-08-22 18:49:04,395 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 18:49:04,396 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 [2020-08-22 18:49:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 18:49:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-08-22 18:49:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 18:49:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 18:49:04,407 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 18:49:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:04,408 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 18:49:04,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 18:49:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:04,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:04,410 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] [2020-08-22 18:49:04,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:49:04,410 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-08-22 18:49:04,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:04,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289683902] [2020-08-22 18:49:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:04,419 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:49:04,430 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:49:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:49:04,441 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:49:04,461 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:49:04,461 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:49:04,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:49:04,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:49:04 BoogieIcfgContainer [2020-08-22 18:49:04,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:49:04,484 INFO L168 Benchmark]: Toolchain (without parser) took 2303.61 ms. Allocated memory was 145.2 MB in the beginning and 233.8 MB in the end (delta: 88.6 MB). Free memory was 102.5 MB in the beginning and 175.0 MB in the end (delta: -72.6 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:04,485 INFO L168 Benchmark]: CDTParser took 0.23 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 18:49:04,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.45 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:04,487 INFO L168 Benchmark]: Boogie Preprocessor took 123.66 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.6 MB in the beginning and 180.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:04,488 INFO L168 Benchmark]: RCFGBuilder took 260.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 166.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:04,489 INFO L168 Benchmark]: TraceAbstraction took 1654.91 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 166.6 MB in the beginning and 175.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:04,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.45 ms. Allocated memory is still 145.2 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.66 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.6 MB in the beginning and 180.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 260.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 166.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1654.91 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 166.6 MB in the beginning and 175.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 23.5 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: 1.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, 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, 0.0s 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...