/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/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:27:05,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:27:05,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:27:05,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:27:05,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:27:05,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:27:05,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:27:05,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:27:05,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:27:05,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:27:05,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:27:05,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:27:05,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:27:05,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:27:05,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:27:05,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:27:05,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:27:05,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:27:05,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:27:05,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:27:05,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:27:05,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:27:05,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:27:05,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:27:05,371 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:27:05,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:27:05,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:27:05,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:27:05,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:27:05,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:27:05,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:27:05,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:27:05,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:27:05,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:27:05,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:27:05,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:27:05,373 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:27:05,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:27:05,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:27:05,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:27:05,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:27:05,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:27:05,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:27:05,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:27:05,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:27:05,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:27:05,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:27:05,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:27:05,785 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:27:05,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-10-23 20:27:05,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91cec0d0c/d58df2686a8e4e81867603fef5244b91/FLAG6a40008f3 [2020-10-23 20:27:06,583 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:27:06,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-10-23 20:27:06,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91cec0d0c/d58df2686a8e4e81867603fef5244b91/FLAG6a40008f3 [2020-10-23 20:27:06,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91cec0d0c/d58df2686a8e4e81867603fef5244b91 [2020-10-23 20:27:06,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:27:06,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:27:06,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:06,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:27:06,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:27:06,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:06,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253661c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:06, skipping insertion in model container [2020-10-23 20:27:06,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:06" (1/1) ... [2020-10-23 20:27:07,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:27:07,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:27:07,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:07,234 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:27:07,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:07,265 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:27:07,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07 WrapperNode [2020-10-23 20:27:07,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:07,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:27:07,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:27:07,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:27:07,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (1/1) ... [2020-10-23 20:27:07,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (1/1) ... [2020-10-23 20:27:07,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (1/1) ... [2020-10-23 20:27:07,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (1/1) ... [2020-10-23 20:27:07,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (1/1) ... [2020-10-23 20:27:07,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (1/1) ... [2020-10-23 20:27:07,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (1/1) ... [2020-10-23 20:27:07,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:27:07,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:27:07,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:27:07,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:27:07,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (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 [2020-10-23 20:27:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:27:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:27:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:27:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 20:27:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:27:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:27:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:27:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:27:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:27:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:27:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 20:27:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:27:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:27:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:27:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:27:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:27:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:27:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:27:07,637 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:27:07,637 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:27:07,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:07 BoogieIcfgContainer [2020-10-23 20:27:07,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:27:07,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:27:07,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:27:07,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:27:07,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:27:06" (1/3) ... [2020-10-23 20:27:07,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431005b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:07, skipping insertion in model container [2020-10-23 20:27:07,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:07" (2/3) ... [2020-10-23 20:27:07,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431005b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:07, skipping insertion in model container [2020-10-23 20:27:07,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:07" (3/3) ... [2020-10-23 20:27:07,649 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-10-23 20:27:07,663 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:27:07,668 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:27:07,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:27:07,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:27:07,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:27:07,739 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:27:07,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:27:07,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:27:07,740 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:27:07,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:27:07,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:27:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-23 20:27:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 20:27:07,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:07,768 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, 1, 1] [2020-10-23 20:27:07,768 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1785484606, now seen corresponding path program 1 times [2020-10-23 20:27:07,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:07,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785938463] [2020-10-23 20:27:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:07,886 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:27:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:27:08,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785938463] [2020-10-23 20:27:08,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:08,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:08,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251684532] [2020-10-23 20:27:08,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:08,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:08,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:08,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:08,285 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2020-10-23 20:27:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:08,653 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-23 20:27:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:08,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 20:27:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:08,666 INFO L225 Difference]: With dead ends: 57 [2020-10-23 20:27:08,666 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 20:27:08,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 20:27:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-23 20:27:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 20:27:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-23 20:27:08,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2020-10-23 20:27:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:08,727 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-23 20:27:08,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-23 20:27:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 20:27:08,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:08,730 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, 1, 1, 1] [2020-10-23 20:27:08,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:27:08,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:08,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1068328173, now seen corresponding path program 1 times [2020-10-23 20:27:08,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:08,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072164916] [2020-10-23 20:27:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:08,737 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:27:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:27:08,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072164916] [2020-10-23 20:27:08,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:08,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887525395] [2020-10-23 20:27:08,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:08,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:08,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:08,903 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2020-10-23 20:27:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:09,180 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-23 20:27:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:09,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-23 20:27:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:09,183 INFO L225 Difference]: With dead ends: 59 [2020-10-23 20:27:09,183 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 20:27:09,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 20:27:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-23 20:27:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 20:27:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-23 20:27:09,201 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-23 20:27:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:09,202 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-23 20:27:09,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-23 20:27:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 20:27:09,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:09,204 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, 1, 1, 1] [2020-10-23 20:27:09,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:27:09,205 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:09,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash -781296813, now seen corresponding path program 1 times [2020-10-23 20:27:09,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:09,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314409212] [2020-10-23 20:27:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:09,209 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:27:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:27:09,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314409212] [2020-10-23 20:27:09,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:09,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:27:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662832294] [2020-10-23 20:27:09,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:27:09,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:27:09,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:27:09,430 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-10-23 20:27:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:09,895 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-23 20:27:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:27:09,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-23 20:27:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:09,897 INFO L225 Difference]: With dead ends: 51 [2020-10-23 20:27:09,898 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 20:27:09,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:27:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 20:27:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 20:27:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 20:27:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-23 20:27:09,915 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-23 20:27:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:09,916 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-23 20:27:09,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:27:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-23 20:27:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:27:09,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:09,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2020-10-23 20:27:09,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:27:09,919 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:09,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1351088482, now seen corresponding path program 1 times [2020-10-23 20:27:09,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:09,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094921054] [2020-10-23 20:27:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:09,924 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:27:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:27:10,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094921054] [2020-10-23 20:27:10,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:10,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:10,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762885788] [2020-10-23 20:27:10,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:10,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:10,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:10,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:10,097 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 6 states. [2020-10-23 20:27:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:10,339 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-23 20:27:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:10,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-23 20:27:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:10,342 INFO L225 Difference]: With dead ends: 53 [2020-10-23 20:27:10,342 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 20:27:10,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 20:27:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-23 20:27:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 20:27:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-23 20:27:10,356 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 47 [2020-10-23 20:27:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:10,357 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-23 20:27:10,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-23 20:27:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:27:10,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:10,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2020-10-23 20:27:10,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:27:10,359 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:10,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1638119842, now seen corresponding path program 2 times [2020-10-23 20:27:10,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:10,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440054951] [2020-10-23 20:27:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:10,363 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:27:10,396 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:27:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:27:10,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:27:10,486 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:27:10,486 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:27:10,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:27:10,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:27:10 BoogieIcfgContainer [2020-10-23 20:27:10,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:27:10,507 INFO L168 Benchmark]: Toolchain (without parser) took 3531.82 ms. Allocated memory was 125.8 MB in the beginning and 159.4 MB in the end (delta: 33.6 MB). Free memory was 102.7 MB in the beginning and 86.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:10,508 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:27:10,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.30 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 93.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:10,510 INFO L168 Benchmark]: Boogie Preprocessor took 36.90 ms. Allocated memory is still 125.8 MB. Free memory was 93.0 MB in the beginning and 91.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:10,511 INFO L168 Benchmark]: RCFGBuilder took 334.10 ms. Allocated memory is still 125.8 MB. Free memory was 91.8 MB in the beginning and 78.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:10,512 INFO L168 Benchmark]: TraceAbstraction took 2862.96 ms. Allocated memory was 125.8 MB in the beginning and 159.4 MB in the end (delta: 33.6 MB). Free memory was 77.5 MB in the beginning and 86.6 MB in the end (delta: -9.0 MB). Peak memory consumption was 25.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:10,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.30 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 93.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.90 ms. Allocated memory is still 125.8 MB. Free memory was 93.0 MB in the beginning and 91.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.10 ms. Allocated memory is still 125.8 MB. Free memory was 91.8 MB in the beginning and 78.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2862.96 ms. Allocated memory was 125.8 MB in the beginning and 159.4 MB in the end (delta: 33.6 MB). Free memory was 77.5 MB in the beginning and 86.6 MB in the end (delta: -9.0 MB). Peak memory consumption was 25.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id((unsigned int)x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id((unsigned int)x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id((unsigned int)x-1) [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; [L8] RET, EXPR id((unsigned int)x-1) [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; [L15] RET, EXPR id(input) [L15] int result = id(input); [L16] COND TRUE result == 2 [L17] CALL reach_error() [L4] __assert_fail("0", "id_b3_o2-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 120 SDslu, 244 SDs, 0 SdLazy, 402 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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, 5 StatesRemovedByMinimization, 2 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...