/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:07:46,222 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:07:46,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:07:46,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:07:46,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:07:46,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:07:46,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:07:46,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:07:46,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:07:46,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:07:46,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:07:46,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:07:46,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:07:46,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:07:46,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:07:46,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:07:46,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:07:46,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:07:46,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:07:46,406 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:07:46,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:07:46,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:07:46,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:07:46,409 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:07:46,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:07:46,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:07:46,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:07:46,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:07:46,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:07:46,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:07:46,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:07:46,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:07:46,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:07:46,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:07:46,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:07:46,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:07:46,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:07:46,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:07:46,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:07:46,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:07:46,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:07:46,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:07:46,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:07:46,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:07:46,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:07:46,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:07:46,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:07:46,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:07:46,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:07:46,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:07:46,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:07:46,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:07:46,906 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:07:46,907 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:07:46,908 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c [2020-09-24 15:07:47,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6bf15093/8d42bdd246d54925bb47125103683b8f/FLAGa62741e1e [2020-09-24 15:07:47,549 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:07:47,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_1.c [2020-09-24 15:07:47,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6bf15093/8d42bdd246d54925bb47125103683b8f/FLAGa62741e1e [2020-09-24 15:07:47,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6bf15093/8d42bdd246d54925bb47125103683b8f [2020-09-24 15:07:47,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:07:47,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:07:47,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:47,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:07:47,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:07:47,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:47" (1/1) ... [2020-09-24 15:07:47,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a73c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:47, skipping insertion in model container [2020-09-24 15:07:47,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:47" (1/1) ... [2020-09-24 15:07:47,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:07:47,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:07:48,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:48,200 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:07:48,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:48,237 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:07:48,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48 WrapperNode [2020-09-24 15:07:48,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:48,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:07:48,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:07:48,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:07:48,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:07:48,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:07:48,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:07:48,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:07:48,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 15:07:48,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:07:48,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:07:48,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:07:48,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:07:48,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:07:48,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:07:48,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:07:48,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:07:48,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:07:48,617 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:07:48,618 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:07:48,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:48 BoogieIcfgContainer [2020-09-24 15:07:48,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:07:48,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:07:48,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:07:48,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:07:48,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:07:47" (1/3) ... [2020-09-24 15:07:48,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1202b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:48, skipping insertion in model container [2020-09-24 15:07:48,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (2/3) ... [2020-09-24 15:07:48,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1202b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:48, skipping insertion in model container [2020-09-24 15:07:48,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:48" (3/3) ... [2020-09-24 15:07:48,634 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_1.c [2020-09-24 15:07:48,647 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:07:48,659 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:07:48,681 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:07:48,712 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:07:48,712 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:07:48,712 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:07:48,712 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:07:48,712 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:07:48,713 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:07:48,713 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:07:48,713 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:07:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-24 15:07:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-24 15:07:48,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:48,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:48,745 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -10313984, now seen corresponding path program 1 times [2020-09-24 15:07:48,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:48,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354186304] [2020-09-24 15:07:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:48,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354186304] [2020-09-24 15:07:48,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:48,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 15:07:48,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233550353] [2020-09-24 15:07:48,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 15:07:48,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:48,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 15:07:48,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:07:48,914 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-09-24 15:07:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:48,946 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2020-09-24 15:07:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 15:07:48,948 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-24 15:07:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:48,959 INFO L225 Difference]: With dead ends: 26 [2020-09-24 15:07:48,959 INFO L226 Difference]: Without dead ends: 13 [2020-09-24 15:07:48,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:07:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-24 15:07:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-24 15:07:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-24 15:07:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-09-24 15:07:49,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-09-24 15:07:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:49,012 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-09-24 15:07:49,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 15:07:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-09-24 15:07:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-24 15:07:49,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:49,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:49,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:07:49,014 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:49,015 INFO L82 PathProgramCache]: Analyzing trace with hash -13144129, now seen corresponding path program 1 times [2020-09-24 15:07:49,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:49,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068464600] [2020-09-24 15:07:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:49,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068464600] [2020-09-24 15:07:49,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:49,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:07:49,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830725361] [2020-09-24 15:07:49,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:07:49,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:07:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:07:49,138 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-09-24 15:07:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:49,176 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-09-24 15:07:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:07:49,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-24 15:07:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:49,177 INFO L225 Difference]: With dead ends: 13 [2020-09-24 15:07:49,178 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:07:49,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:07:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:07:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:07:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:07:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:07:49,182 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-09-24 15:07:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:49,182 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:07:49,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:07:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:07:49,183 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:07:49,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:07:49,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:07:49,230 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 15:07:49,231 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:07:49,231 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:07:49,231 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 15:07:49,232 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 15:07:49,232 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 15:07:49,232 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2020-09-24 15:07:49,232 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2020-09-24 15:07:49,233 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (= main_~x~0 0) [2020-09-24 15:07:49,233 INFO L264 CegarLoopResult]: At program point L15-1(lines 13 16) the Hoare annotation is: (= main_~x~0 0) [2020-09-24 15:07:49,233 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2020-09-24 15:07:49,233 INFO L264 CegarLoopResult]: At program point L13-2(lines 13 16) the Hoare annotation is: false [2020-09-24 15:07:49,234 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-24 15:07:49,234 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-24 15:07:49,234 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 15:07:49,234 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-24 15:07:49,235 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-24 15:07:49,235 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-24 15:07:49,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:07:49 BoogieIcfgContainer [2020-09-24 15:07:49,259 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:07:49,264 INFO L168 Benchmark]: Toolchain (without parser) took 1358.42 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.1 MB in the beginning and 140.6 MB in the end (delta: -36.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:49,265 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 15:07:49,266 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.54 ms. Allocated memory is still 147.8 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:49,268 INFO L168 Benchmark]: Boogie Preprocessor took 126.97 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.2 MB in the beginning and 183.9 MB in the end (delta: -89.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:49,269 INFO L168 Benchmark]: RCFGBuilder took 256.47 ms. Allocated memory is still 203.9 MB. Free memory was 183.9 MB in the beginning and 172.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:49,270 INFO L168 Benchmark]: TraceAbstraction took 635.89 ms. Allocated memory is still 203.9 MB. Free memory was 172.1 MB in the beginning and 140.6 MB in the end (delta: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:49,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 328.54 ms. Allocated memory is still 147.8 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.97 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.2 MB in the beginning and 183.9 MB in the end (delta: -89.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.47 ms. Allocated memory is still 203.9 MB. Free memory was 183.9 MB in the beginning and 172.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 635.89 ms. Allocated memory is still 203.9 MB. Free memory was 172.1 MB in the beginning and 140.6 MB in the end (delta: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 19 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 12 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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 correct! Received shutdown request...