/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:26:20,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:26:20,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:26:20,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:26:20,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:26:20,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:26:20,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:26:20,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:26:20,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:26:20,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:26:20,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:26:20,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:26:20,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:26:20,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:26:20,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:26:20,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:26:20,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:26:20,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:26:20,547 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:26:20,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:26:20,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:26:20,552 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:26:20,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:26:20,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:26:20,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:26:20,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:26:20,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:26:20,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:26:20,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:26:20,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:26:20,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:26:20,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:26:20,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:26:20,555 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:26:20,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:26:20,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:26:20,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:26:20,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:26:20,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:26:20,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:26:20,556 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:26:20,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:26:20,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:26:20,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:26:20,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:26:20,945 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:26:20,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-11-07 00:26:21,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e36cba67d/a88fbe5911b2464380f06e1738b6ba99/FLAG2161636ce [2020-11-07 00:26:21,632 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:26:21,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-11-07 00:26:21,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e36cba67d/a88fbe5911b2464380f06e1738b6ba99/FLAG2161636ce [2020-11-07 00:26:22,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e36cba67d/a88fbe5911b2464380f06e1738b6ba99 [2020-11-07 00:26:22,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:26:22,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:26:22,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:22,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:26:22,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:26:22,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b84abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22, skipping insertion in model container [2020-11-07 00:26:22,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:26:22,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:26:22,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:22,205 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:26:22,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:22,238 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:26:22,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22 WrapperNode [2020-11-07 00:26:22,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:22,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:26:22,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:26:22,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:26:22,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (1/1) ... [2020-11-07 00:26:22,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:26:22,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:26:22,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:26:22,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:26:22,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (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 [2020-11-07 00:26:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:26:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:26:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:26:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-07 00:26:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:26:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:26:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:26:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:26:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:26:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-07 00:26:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:26:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:26:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:26:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:26:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:26:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:26:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:26:22,630 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:26:22,631 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:26:22,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:22 BoogieIcfgContainer [2020-11-07 00:26:22,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:26:22,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:26:22,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:26:22,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:26:22,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:26:22" (1/3) ... [2020-11-07 00:26:22,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722eed48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:22, skipping insertion in model container [2020-11-07 00:26:22,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:22" (2/3) ... [2020-11-07 00:26:22,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722eed48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:22, skipping insertion in model container [2020-11-07 00:26:22,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:22" (3/3) ... [2020-11-07 00:26:22,644 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2020-11-07 00:26:22,685 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:26:22,688 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:26:22,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:26:22,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:26:22,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:26:22,746 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:26:22,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:26:22,747 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:26:22,747 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:26:22,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:26:22,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:26:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-07 00:26:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 00:26:22,793 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:22,795 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:22,795 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -553296711, now seen corresponding path program 1 times [2020-11-07 00:26:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:22,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061154853] [2020-11-07 00:26:22,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:22,922 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:23,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-07 00:26:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:26:23,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061154853] [2020-11-07 00:26:23,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:23,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:26:23,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765629535] [2020-11-07 00:26:23,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:26:23,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:23,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:26:23,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:26:23,447 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 9 states. [2020-11-07 00:26:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:24,068 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-11-07 00:26:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:26:24,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-11-07 00:26:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:24,079 INFO L225 Difference]: With dead ends: 42 [2020-11-07 00:26:24,079 INFO L226 Difference]: Without dead ends: 30 [2020-11-07 00:26:24,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:26:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-07 00:26:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-07 00:26:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-07 00:26:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-11-07 00:26:24,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2020-11-07 00:26:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:24,137 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-11-07 00:26:24,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:26:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-11-07 00:26:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 00:26:24,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:24,139 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:24,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:26:24,143 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash 540981577, now seen corresponding path program 2 times [2020-11-07 00:26:24,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:24,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549257367] [2020-11-07 00:26:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:24,148 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:26:24,192 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:26:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:26:24,225 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:26:24,254 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:26:24,254 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:26:24,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:26:24,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:26:24 BoogieIcfgContainer [2020-11-07 00:26:24,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:26:24,273 INFO L168 Benchmark]: Toolchain (without parser) took 2260.48 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 102.5 MB in the beginning and 134.1 MB in the end (delta: -31.5 MB). Peak memory consumption was 49.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:24,274 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 100.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:26:24,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.69 ms. Allocated memory is still 125.8 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:24,276 INFO L168 Benchmark]: Boogie Preprocessor took 31.90 ms. Allocated memory is still 125.8 MB. Free memory was 92.7 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:24,277 INFO L168 Benchmark]: RCFGBuilder took 360.88 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 79.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:24,278 INFO L168 Benchmark]: TraceAbstraction took 1635.21 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 79.0 MB in the beginning and 134.1 MB in the end (delta: -55.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:24,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 100.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.69 ms. Allocated memory is still 125.8 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.90 ms. Allocated memory is still 125.8 MB. Free memory was 92.7 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.88 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 79.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1635.21 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 79.0 MB in the beginning and 134.1 MB in the end (delta: -55.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] CALL f(4) [L6] COND FALSE !(n<3) [L7] n-- [L8] CALL f(n) [L6] COND FALSE !(n<3) [L7] n-- [L8] CALL f(n) [L6] COND TRUE n<3 [L8] RET f(n) [L9] CALL reach_error() [L3] __assert_fail("0", "afterrec-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 26 SDslu, 70 SDs, 0 SdLazy, 60 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...