/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 --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:59:31,940 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-27 21:59:31,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:59:31,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:59:31,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:59:31,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:59:31,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:59:31,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:59:31,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:59:31,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:59:31,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:59:31,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:59:31,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:59:32,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:59:32,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-27 21:59:32,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:59:32,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:59:32,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:59:32,015 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 [2020-08-27 21:59:32,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:59:32,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:59:32,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:59:32,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:59:32,047 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:59:32,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:59:32,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:59:32,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:59:32,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:59:32,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:59:32,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:59:32,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:59:32,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:59:32,050 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:59:32,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:59:32,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:59:32,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:59:32,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:59:32,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:59:32,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:59:32,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:59:32,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:59:32,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:59:32,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:59:32,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:59:32,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:59:32,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:59:32,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:59:32,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:59:32,054 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.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:59:32,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:59:32,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:59:32,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:59:32,605 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:59:32,605 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:59:32,607 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-27 21:59:32,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3eb99706f/c6e05cd7983f4f61ae993f33307d21ae/FLAGd59470a68 [2020-08-27 21:59:33,276 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:59:33,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-27 21:59:33,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3eb99706f/c6e05cd7983f4f61ae993f33307d21ae/FLAGd59470a68 [2020-08-27 21:59:33,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3eb99706f/c6e05cd7983f4f61ae993f33307d21ae [2020-08-27 21:59:33,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:59:33,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:59:33,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:59:33,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:59:33,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:59:33,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:33,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28feb17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33, skipping insertion in model container [2020-08-27 21:59:33,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:33,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:59:33,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:59:33,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:59:33,893 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:59:33,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:59:33,931 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:59:33,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33 WrapperNode [2020-08-27 21:59:33,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:59:33,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:59:33,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:59:33,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:59:33,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:33,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:34,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:34,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:34,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:34,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:34,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (1/1) ... [2020-08-27 21:59:34,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:59:34,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:59:34,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:59:34,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:59:34,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (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 [2020-08-27 21:59:34,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:59:34,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:59:34,120 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-27 21:59:34,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-27 21:59:34,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:59:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:59:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:59:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-27 21:59:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-27 21:59:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:59:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:59:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:59:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:59:34,346 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:59:34,347 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:59:34,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:59:34 BoogieIcfgContainer [2020-08-27 21:59:34,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:59:34,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:59:34,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:59:34,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:59:34,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:59:33" (1/3) ... [2020-08-27 21:59:34,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32098dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:59:34, skipping insertion in model container [2020-08-27 21:59:34,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:33" (2/3) ... [2020-08-27 21:59:34,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32098dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:59:34, skipping insertion in model container [2020-08-27 21:59:34,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:59:34" (3/3) ... [2020-08-27 21:59:34,399 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-08-27 21:59:34,426 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:59:34,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:59:34,473 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:59:34,504 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:59:34,504 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:59:34,504 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:59:34,504 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:59:34,505 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:59:34,505 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:59:34,505 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:59:34,505 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:59:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-27 21:59:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-27 21:59:34,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:59:34,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:59:34,533 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:59:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:59:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash 508025261, now seen corresponding path program 1 times [2020-08-27 21:59:34,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:59:34,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672351652] [2020-08-27 21:59:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:59:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:34,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:59:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:59:34,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672351652] [2020-08-27 21:59:34,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:59:34,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:59:34,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614734915] [2020-08-27 21:59:34,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:59:34,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:59:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:59:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:59:34,797 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-08-27 21:59:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:59:34,921 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-08-27 21:59:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:59:34,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-27 21:59:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:59:34,934 INFO L225 Difference]: With dead ends: 46 [2020-08-27 21:59:34,935 INFO L226 Difference]: Without dead ends: 25 [2020-08-27 21:59:34,939 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 [2020-08-27 21:59:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-27 21:59:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-27 21:59:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-27 21:59:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-27 21:59:34,992 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2020-08-27 21:59:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:59:34,993 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-27 21:59:34,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:59:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-27 21:59:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-27 21:59:34,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:59:34,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:59:34,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:59:34,995 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:59:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:59:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash -133512762, now seen corresponding path program 1 times [2020-08-27 21:59:34,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:59:34,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739180771] [2020-08-27 21:59:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:59:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:59:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:59:35,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739180771] [2020-08-27 21:59:35,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:59:35,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:59:35,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122007240] [2020-08-27 21:59:35,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:59:35,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:59:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:59:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:59:35,086 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-08-27 21:59:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:59:35,214 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-27 21:59:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:59:35,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-27 21:59:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:59:35,220 INFO L225 Difference]: With dead ends: 30 [2020-08-27 21:59:35,223 INFO L226 Difference]: Without dead ends: 26 [2020-08-27 21:59:35,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:59:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-27 21:59:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-08-27 21:59:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-27 21:59:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-27 21:59:35,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-27 21:59:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:59:35,237 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-27 21:59:35,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:59:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-27 21:59:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-27 21:59:35,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:59:35,240 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:59:35,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:59:35,241 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:59:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:59:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1022031800, now seen corresponding path program 1 times [2020-08-27 21:59:35,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:59:35,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640203965] [2020-08-27 21:59:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:59:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:59:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:59:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:59:35,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640203965] [2020-08-27 21:59:35,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:59:35,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:59:35,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454632873] [2020-08-27 21:59:35,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:59:35,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:59:35,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:59:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:59:35,403 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-27 21:59:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:59:35,493 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-27 21:59:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:59:35,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-08-27 21:59:35,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:59:35,494 INFO L225 Difference]: With dead ends: 31 [2020-08-27 21:59:35,494 INFO L226 Difference]: Without dead ends: 21 [2020-08-27 21:59:35,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:59:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-27 21:59:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-08-27 21:59:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-27 21:59:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-27 21:59:35,501 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-08-27 21:59:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:59:35,502 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-27 21:59:35,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:59:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-27 21:59:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-27 21:59:35,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:59:35,503 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:59:35,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:59:35,504 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:59:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:59:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash 996292415, now seen corresponding path program 1 times [2020-08-27 21:59:35,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:59:35,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492744576] [2020-08-27 21:59:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:59:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:59:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:59:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:59:35,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492744576] [2020-08-27 21:59:35,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:59:35,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:59:35,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163448939] [2020-08-27 21:59:35,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:59:35,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:59:35,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:59:35,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:59:35,611 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-08-27 21:59:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:59:35,700 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-08-27 21:59:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:59:35,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-27 21:59:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:59:35,702 INFO L225 Difference]: With dead ends: 28 [2020-08-27 21:59:35,702 INFO L226 Difference]: Without dead ends: 19 [2020-08-27 21:59:35,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:59:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-27 21:59:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-27 21:59:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-27 21:59:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-08-27 21:59:35,711 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2020-08-27 21:59:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:59:35,711 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-08-27 21:59:35,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:59:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-08-27 21:59:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-27 21:59:35,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:59:35,713 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:59:35,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:59:35,713 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:59:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:59:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1254457853, now seen corresponding path program 1 times [2020-08-27 21:59:35,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:59:35,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309588553] [2020-08-27 21:59:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:59:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:59:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:59:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:59:35,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309588553] [2020-08-27 21:59:35,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:59:35,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:59:35,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530064502] [2020-08-27 21:59:35,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:59:35,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:59:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:59:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:59:35,829 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2020-08-27 21:59:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:59:35,877 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-27 21:59:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:59:35,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-27 21:59:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:59:35,878 INFO L225 Difference]: With dead ends: 19 [2020-08-27 21:59:35,878 INFO L226 Difference]: Without dead ends: 0 [2020-08-27 21:59:35,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:59:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-27 21:59:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-27 21:59:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-27 21:59:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-27 21:59:35,880 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-08-27 21:59:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:59:35,880 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-27 21:59:35,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:59:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-27 21:59:35,881 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-27 21:59:35,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:59:35,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-27 21:59:36,036 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-27 21:59:36,036 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:59:36,036 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:59:36,037 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-27 21:59:36,038 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-27 21:59:36,038 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-27 21:59:36,038 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-27 21:59:36,038 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-27 21:59:36,039 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-27 21:59:36,039 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-27 21:59:36,039 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-08-27 21:59:36,039 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-08-27 21:59:36,039 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-08-27 21:59:36,041 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 (<= main_~n~0 0) .cse1 (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1))) [2020-08-27 21:59:36,041 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-27 21:59:36,041 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-08-27 21:59:36,041 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0))) (or (and .cse0 (<= main_~m~0 main_~x~0) (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0)))) [2020-08-27 21:59:36,042 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 (<= main_~n~0 0) .cse1 (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1))) [2020-08-27 21:59:36,042 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-08-27 21:59:36,042 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-27 21:59:36,042 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-27 21:59:36,042 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-27 21:59:36,043 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-27 21:59:36,047 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-27 21:59:36,047 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-27 21:59:36,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:59:36 BoogieIcfgContainer [2020-08-27 21:59:36,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:59:36,099 INFO L168 Benchmark]: Toolchain (without parser) took 2477.41 ms. Allocated memory was 143.1 MB in the beginning and 231.7 MB in the end (delta: 88.6 MB). Free memory was 106.2 MB in the beginning and 176.2 MB in the end (delta: -70.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:59:36,102 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:59:36,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.93 ms. Allocated memory is still 143.1 MB. Free memory was 106.0 MB in the beginning and 96.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:59:36,109 INFO L168 Benchmark]: Boogie Preprocessor took 108.87 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 96.4 MB in the beginning and 182.1 MB in the end (delta: -85.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-27 21:59:36,110 INFO L168 Benchmark]: RCFGBuilder took 334.01 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-27 21:59:36,111 INFO L168 Benchmark]: TraceAbstraction took 1716.00 ms. Allocated memory was 203.4 MB in the beginning and 231.7 MB in the end (delta: 28.3 MB). Free memory was 169.3 MB in the beginning and 176.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:59:36,119 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.93 ms. Allocated memory is still 143.1 MB. Free memory was 106.0 MB in the beginning and 96.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.87 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 96.4 MB in the beginning and 182.1 MB in the end (delta: -85.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.01 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1716.00 ms. Allocated memory was 203.4 MB in the beginning and 231.7 MB in the end (delta: 28.3 MB). Free memory was 169.3 MB in the beginning and 176.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 17]: Loop Invariant Derived loop invariant: ((0 <= m && m <= x) && x <= 0) || ((0 <= m && m + 1 <= n) && 0 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 42 SDslu, 240 SDs, 0 SdLazy, 123 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, 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, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 80 HoareAnnotationTreeSize, 15 FomulaSimplifications, 45 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2367 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 7/9 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...