/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:46:15,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:15,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:15,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:15,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:15,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:15,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:15,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:15,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:15,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:15,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:15,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:15,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:15,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:15,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:15,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:15,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:15,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:15,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:15,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:15,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:15,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:15,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:15,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:15,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:46:15,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:46:15,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:46:15,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:46:15,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:46:15,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:46:15,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:46:15,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:46:15,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:46:15,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:46:15,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:46:15,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:46:15,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:46:15,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:46:15,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:15,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:15,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:15,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:46:15,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:15,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:15,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:15,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:15,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:15,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:15,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:15,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:15,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:15,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:15,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:15,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:15,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:15,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:15,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:15,402 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:15,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:15,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:15,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:15,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:15,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:15,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:15,404 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:15,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:15,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:15,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:15,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:15,723 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:15,724 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-08-22 19:46:15,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e9067d1/5c8cd2cce81d4358959b39a567862d54/FLAGabe281f56 [2020-08-22 19:46:16,225 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:16,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-08-22 19:46:16,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e9067d1/5c8cd2cce81d4358959b39a567862d54/FLAGabe281f56 [2020-08-22 19:46:16,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e9067d1/5c8cd2cce81d4358959b39a567862d54 [2020-08-22 19:46:16,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:16,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:16,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:16,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:16,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:16,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c173ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16, skipping insertion in model container [2020-08-22 19:46:16,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:16,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:16,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:16,860 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:16,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:16,889 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:16,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16 WrapperNode [2020-08-22 19:46:16,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:16,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:16,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:16,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:16,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... [2020-08-22 19:46:16,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:16,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:16,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:16,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:16,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:17,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-22 19:46:17,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:17,053 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-22 19:46:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:17,187 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:17,187 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:46:17,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:17 BoogieIcfgContainer [2020-08-22 19:46:17,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:17,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:17,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:17,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:17,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:16" (1/3) ... [2020-08-22 19:46:17,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b1c64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:17, skipping insertion in model container [2020-08-22 19:46:17,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:16" (2/3) ... [2020-08-22 19:46:17,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b1c64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:17, skipping insertion in model container [2020-08-22 19:46:17,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:17" (3/3) ... [2020-08-22 19:46:17,198 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-08-22 19:46:17,208 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:17,215 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:17,227 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:17,243 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:17,243 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:17,243 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:17,244 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:17,244 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:17,244 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:17,244 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:17,244 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 19:46:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 19:46:17,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:17,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:17,268 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1063393928, now seen corresponding path program 1 times [2020-08-22 19:46:17,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:17,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183443439] [2020-08-22 19:46:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:17,326 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:17,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183443439] [2020-08-22 19:46:17,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:17,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:46:17,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261025887] [2020-08-22 19:46:17,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:46:17,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:46:17,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:17,467 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-08-22 19:46:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:17,533 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2020-08-22 19:46:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:46:17,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-22 19:46:17,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:17,546 INFO L225 Difference]: With dead ends: 39 [2020-08-22 19:46:17,546 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 19:46:17,550 INFO L675 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 [2020-08-22 19:46:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 19:46:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-08-22 19:46:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 19:46:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-22 19:46:17,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 10 [2020-08-22 19:46:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:17,609 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-22 19:46:17,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:46:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-22 19:46:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:46:17,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:17,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:17,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:17,612 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:17,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1652124924, now seen corresponding path program 1 times [2020-08-22 19:46:17,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:17,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119253118] [2020-08-22 19:46:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:17,615 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:46:17,639 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:46:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:46:17,652 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:46:17,694 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:46:17,694 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:46:17,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:17,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:46:17 BoogieIcfgContainer [2020-08-22 19:46:17,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:46:17,733 INFO L168 Benchmark]: Toolchain (without parser) took 1061.84 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 103.8 MB in the beginning and 142.6 MB in the end (delta: -38.8 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,734 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.16 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,737 INFO L168 Benchmark]: Boogie Preprocessor took 104.62 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 94.2 MB in the beginning and 180.9 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,739 INFO L168 Benchmark]: RCFGBuilder took 195.72 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,741 INFO L168 Benchmark]: TraceAbstraction took 534.46 ms. Allocated memory is still 201.9 MB. Free memory was 168.8 MB in the beginning and 142.6 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:17,749 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 222.16 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.62 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 94.2 MB in the beginning and 180.9 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 195.72 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 534.46 ms. Allocated memory is still 201.9 MB. Free memory was 168.8 MB in the beginning and 142.6 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; [L24] COND TRUE 1 [L26] CALL eval() [L14] COND TRUE 1 [L15] x=1 [L26] RET eval() [L27] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 7 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 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=24occurred 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, 2 StatesRemovedByMinimization, 1 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...