/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/loops/count_up_down-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:45:40,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:45:40,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:45:40,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:45:40,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:45:40,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:45:40,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:45:40,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:45:40,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:45:40,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:45:40,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:45:40,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:45:40,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:45:40,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:45:40,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:45:40,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:45:40,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:45:40,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:45:40,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:45:40,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:45:40,391 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 21:45:40,425 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:45:40,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:45:40,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:45:40,428 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:45:40,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:45:40,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:45:40,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:45:40,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:45:40,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:45:40,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:45:40,429 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:45:40,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:45:40,430 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:45:40,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:45:40,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:45:40,434 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:45:40,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:45:40,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:45:40,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:40,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:45:40,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:45:40,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:45:40,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:45:40,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:45:40,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:45:40,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:45:40,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:45:40,859 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:45:40,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-2.c [2020-10-23 21:45:40,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191a4c317/ab73b09900d04471acd744ee5ece895f/FLAG9afc65b19 [2020-10-23 21:45:41,540 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:45:41,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-2.c [2020-10-23 21:45:41,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191a4c317/ab73b09900d04471acd744ee5ece895f/FLAG9afc65b19 [2020-10-23 21:45:41,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191a4c317/ab73b09900d04471acd744ee5ece895f [2020-10-23 21:45:41,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:45:41,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:45:41,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:41,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:45:41,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:45:41,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:41" (1/1) ... [2020-10-23 21:45:41,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349b4ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:41, skipping insertion in model container [2020-10-23 21:45:41,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:41" (1/1) ... [2020-10-23 21:45:41,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:45:41,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:45:42,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:42,145 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:45:42,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:42,177 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:45:42,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42 WrapperNode [2020-10-23 21:45:42,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:42,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:45:42,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:45:42,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:45:42,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (1/1) ... [2020-10-23 21:45:42,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (1/1) ... [2020-10-23 21:45:42,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (1/1) ... [2020-10-23 21:45:42,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (1/1) ... [2020-10-23 21:45:42,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (1/1) ... [2020-10-23 21:45:42,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (1/1) ... [2020-10-23 21:45:42,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (1/1) ... [2020-10-23 21:45:42,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:45:42,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:45:42,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:45:42,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:45:42,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (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 21:45:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:45:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:45:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:45:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:45:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:45:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:45:42,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:45:42,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 21:45:42,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:45:42,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:45:42,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:45:42,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:45:42,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:45:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:45:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:45:42,547 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:45:42,548 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:45:42,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:42 BoogieIcfgContainer [2020-10-23 21:45:42,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:45:42,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:45:42,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:45:42,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:45:42,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:45:41" (1/3) ... [2020-10-23 21:45:42,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71cf5b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:42, skipping insertion in model container [2020-10-23 21:45:42,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:42" (2/3) ... [2020-10-23 21:45:42,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71cf5b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:42, skipping insertion in model container [2020-10-23 21:45:42,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:42" (3/3) ... [2020-10-23 21:45:42,560 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-2.c [2020-10-23 21:45:42,574 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:45:42,580 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:45:42,615 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:45:42,678 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:45:42,678 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:45:42,679 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:45:42,679 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:45:42,679 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:45:42,679 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:45:42,679 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:45:42,679 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:45:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 21:45:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 21:45:42,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:42,734 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] [2020-10-23 21:45:42,734 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1625036597, now seen corresponding path program 1 times [2020-10-23 21:45:42,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:42,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006355924] [2020-10-23 21:45:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:42,843 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:43,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:43,157 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 21:45:43,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006355924] [2020-10-23 21:45:43,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:43,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:45:43,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724636739] [2020-10-23 21:45:43,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:45:43,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:45:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:45:43,199 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-23 21:45:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:43,289 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-23 21:45:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:45:43,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-23 21:45:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:43,299 INFO L225 Difference]: With dead ends: 50 [2020-10-23 21:45:43,300 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 21:45:43,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:45:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 21:45:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 21:45:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 21:45:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-23 21:45:43,359 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2020-10-23 21:45:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-23 21:45:43,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:45:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-23 21:45:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 21:45:43,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:43,365 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] [2020-10-23 21:45:43,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:45:43,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1338745087, now seen corresponding path program 1 times [2020-10-23 21:45:43,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:43,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472086098] [2020-10-23 21:45:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:43,376 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:45:43,421 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:45:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:45:43,453 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:45:43,481 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:45:43,481 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:45:43,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:45:43,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:45:43 BoogieIcfgContainer [2020-10-23 21:45:43,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:45:43,499 INFO L168 Benchmark]: Toolchain (without parser) took 1571.16 ms. Allocated memory is still 153.1 MB. Free memory was 130.2 MB in the beginning and 104.5 MB in the end (delta: 25.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:43,500 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 103.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:45:43,501 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.53 ms. Allocated memory is still 153.1 MB. Free memory was 129.6 MB in the beginning and 120.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:43,502 INFO L168 Benchmark]: Boogie Preprocessor took 35.11 ms. Allocated memory is still 153.1 MB. Free memory was 120.5 MB in the beginning and 119.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:43,504 INFO L168 Benchmark]: RCFGBuilder took 334.62 ms. Allocated memory is still 153.1 MB. Free memory was 118.9 MB in the beginning and 105.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:43,505 INFO L168 Benchmark]: TraceAbstraction took 944.79 ms. Allocated memory is still 153.1 MB. Free memory was 105.0 MB in the beginning and 104.5 MB in the end (delta: 531.4 kB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:43,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 103.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.53 ms. Allocated memory is still 153.1 MB. Free memory was 129.6 MB in the beginning and 120.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.11 ms. Allocated memory is still 153.1 MB. Free memory was 120.5 MB in the beginning and 119.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.62 ms. Allocated memory is still 153.1 MB. Free memory was 118.9 MB in the beginning and 105.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 944.79 ms. Allocated memory is still 153.1 MB. Free memory was 105.0 MB in the beginning and 104.5 MB in the end (delta: 531.4 kB). Peak memory consumption was 1.5 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: [L15] unsigned int n = __VERIFIER_nondet_uint(); [L16] unsigned int x=n, y=0; [L17] COND FALSE !(x>0) [L22] CALL __VERIFIER_assert(y!=n) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "count_up_down-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 18 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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...