/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:02:15,377 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 22:02:15,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:02:15,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:02:15,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:02:15,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:02:15,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:02:15,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:02:15,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:02:15,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:02:15,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:02:15,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:02:15,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:02:15,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:02:15,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:02:15,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:02:15,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:02:15,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:02:15,492 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 [2020-08-18 22:02:15,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:02:15,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:02:15,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:02:15,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:02:15,516 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:02:15,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:02:15,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:02:15,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:02:15,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:02:15,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:02:15,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:02:15,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:02:15,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:02:15,518 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:02:15,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:02:15,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:02:15,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:02:15,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:02:15,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:02:15,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:02:15,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:02:15,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:02:15,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:02:15,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:02:15,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:02:15,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:02:15,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:02:15,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:02:15,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:02:15,521 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:02:15,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:02:15,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:02:15,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:02:15,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:02:15,845 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:02:15,845 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-18 22:02:15,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9614f0a2/46dd8a30a28d4f208ec1036c6590d5db/FLAGca125ea16 [2020-08-18 22:02:16,323 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:02:16,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-08-18 22:02:16,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9614f0a2/46dd8a30a28d4f208ec1036c6590d5db/FLAGca125ea16 [2020-08-18 22:02:16,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9614f0a2/46dd8a30a28d4f208ec1036c6590d5db [2020-08-18 22:02:16,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:02:16,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:02:16,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:16,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:02:16,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:02:16,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39062356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16, skipping insertion in model container [2020-08-18 22:02:16,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:02:16,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:02:16,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:16,852 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:02:16,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:16,880 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:02:16,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16 WrapperNode [2020-08-18 22:02:16,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:16,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:02:16,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:02:16,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:02:16,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (1/1) ... [2020-08-18 22:02:16,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:02:16,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:02:16,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:02:16,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:02:16,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (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 [2020-08-18 22:02:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:02:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:02:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:02:17,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:02:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:02:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:02:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 22:02:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:02:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:02:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:02:17,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:02:17,243 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 22:02:17,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:17 BoogieIcfgContainer [2020-08-18 22:02:17,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:02:17,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:02:17,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:02:17,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:02:17,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:02:16" (1/3) ... [2020-08-18 22:02:17,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593681e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:17, skipping insertion in model container [2020-08-18 22:02:17,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:16" (2/3) ... [2020-08-18 22:02:17,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593681e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:17, skipping insertion in model container [2020-08-18 22:02:17,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:17" (3/3) ... [2020-08-18 22:02:17,256 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-18 22:02:17,267 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:02:17,275 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:02:17,291 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:02:17,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:02:17,318 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:02:17,319 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:02:17,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:02:17,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:02:17,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:02:17,320 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:02:17,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:02:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 22:02:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 22:02:17,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:17,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:17,354 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-18 22:02:17,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:17,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517300512] [2020-08-18 22:02:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:17,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:17,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517300512] [2020-08-18 22:02:17,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:17,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 22:02:17,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18212168] [2020-08-18 22:02:17,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 22:02:17,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 22:02:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 22:02:17,578 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 22:02:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:17,603 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-18 22:02:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 22:02:17,605 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 22:02:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:17,614 INFO L225 Difference]: With dead ends: 30 [2020-08-18 22:02:17,614 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 22:02:17,618 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 [2020-08-18 22:02:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 22:02:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 22:02:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 22:02:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-18 22:02:17,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-18 22:02:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:17,660 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-18 22:02:17,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 22:02:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-18 22:02:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 22:02:17,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:17,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:17,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:02:17,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-18 22:02:17,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:17,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773125798] [2020-08-18 22:02:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:17,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:17,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773125798] [2020-08-18 22:02:17,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:17,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:02:17,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912452628] [2020-08-18 22:02:17,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:17,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:17,765 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-18 22:02:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:17,813 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-18 22:02:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:02:17,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 22:02:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:17,815 INFO L225 Difference]: With dead ends: 21 [2020-08-18 22:02:17,815 INFO L226 Difference]: Without dead ends: 16 [2020-08-18 22:02:17,816 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 [2020-08-18 22:02:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-18 22:02:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-18 22:02:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 22:02:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-18 22:02:17,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-18 22:02:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:17,823 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-18 22:02:17,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-18 22:02:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:02:17,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:17,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:17,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:02:17,825 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-18 22:02:17,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:17,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277237465] [2020-08-18 22:02:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:18,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277237465] [2020-08-18 22:02:18,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:18,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:02:18,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065498879] [2020-08-18 22:02:18,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:02:18,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:02:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:02:18,071 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-08-18 22:02:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:18,187 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-18 22:02:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:02:18,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-08-18 22:02:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:18,190 INFO L225 Difference]: With dead ends: 28 [2020-08-18 22:02:18,191 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 22:02:18,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:02:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 22:02:18,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-18 22:02:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 22:02:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-18 22:02:18,199 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-18 22:02:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:18,199 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-18 22:02:18,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:02:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-18 22:02:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 22:02:18,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:18,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:18,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:02:18,201 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-18 22:02:18,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:18,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358749162] [2020-08-18 22:02:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:02:18,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358749162] [2020-08-18 22:02:18,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:18,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:02:18,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323324599] [2020-08-18 22:02:18,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:02:18,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:02:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:02:18,264 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-08-18 22:02:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:18,288 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-18 22:02:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:02:18,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 22:02:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:18,291 INFO L225 Difference]: With dead ends: 28 [2020-08-18 22:02:18,291 INFO L226 Difference]: Without dead ends: 17 [2020-08-18 22:02:18,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:02:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-18 22:02:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-18 22:02:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-18 22:02:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-18 22:02:18,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-08-18 22:02:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:18,301 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-18 22:02:18,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:02:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-18 22:02:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 22:02:18,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:18,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:18,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:02:18,303 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-08-18 22:02:18,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:18,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045743939] [2020-08-18 22:02:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:18,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045743939] [2020-08-18 22:02:18,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:18,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 22:02:18,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95225919] [2020-08-18 22:02:18,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:02:18,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:02:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:02:18,342 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-08-18 22:02:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:18,370 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-18 22:02:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:02:18,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-18 22:02:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:18,372 INFO L225 Difference]: With dead ends: 27 [2020-08-18 22:02:18,372 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 22:02:18,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:02:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 22:02:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-18 22:02:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 22:02:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 22:02:18,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-08-18 22:02:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:18,380 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 22:02:18,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:02:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 22:02:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 22:02:18,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:18,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:18,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:02:18,382 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-18 22:02:18,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:18,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391357166] [2020-08-18 22:02:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 22:02:18,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391357166] [2020-08-18 22:02:18,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:18,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:02:18,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260686261] [2020-08-18 22:02:18,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:02:18,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:02:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:02:18,611 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-08-18 22:02:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:18,786 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-18 22:02:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:02:18,787 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-08-18 22:02:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:18,788 INFO L225 Difference]: With dead ends: 27 [2020-08-18 22:02:18,788 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 22:02:18,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:02:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 22:02:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 22:02:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 22:02:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-18 22:02:18,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-18 22:02:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:18,794 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-18 22:02:18,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:02:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-18 22:02:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:02:18,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:18,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:18,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:02:18,796 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:18,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-08-18 22:02:18,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:18,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803377467] [2020-08-18 22:02:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:18,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803377467] [2020-08-18 22:02:18,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:18,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:02:18,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016832822] [2020-08-18 22:02:18,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:18,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:18,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:18,858 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-18 22:02:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:18,898 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 22:02:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:02:18,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 22:02:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:18,901 INFO L225 Difference]: With dead ends: 33 [2020-08-18 22:02:18,901 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 22:02:18,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 22:02:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-18 22:02:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 22:02:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 22:02:18,909 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-18 22:02:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:18,910 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 22:02:18,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 22:02:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:02:18,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:18,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:18,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:02:18,913 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:18,913 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-08-18 22:02:18,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:18,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478851561] [2020-08-18 22:02:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:18,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478851561] [2020-08-18 22:02:18,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:18,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:02:18,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037886517] [2020-08-18 22:02:18,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:02:18,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:18,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:02:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:18,994 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-18 22:02:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:19,034 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-18 22:02:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:19,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 22:02:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:19,036 INFO L225 Difference]: With dead ends: 36 [2020-08-18 22:02:19,036 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 22:02:19,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 22:02:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 22:02:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 22:02:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-18 22:02:19,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-08-18 22:02:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:19,042 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-18 22:02:19,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:02:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-18 22:02:19,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:02:19,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:19,044 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:19,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:02:19,044 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-08-18 22:02:19,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:19,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530995750] [2020-08-18 22:02:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:19,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530995750] [2020-08-18 22:02:19,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:19,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:02:19,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205214173] [2020-08-18 22:02:19,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:02:19,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:02:19,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:19,106 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-18 22:02:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:19,150 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-18 22:02:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:02:19,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 22:02:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:19,152 INFO L225 Difference]: With dead ends: 39 [2020-08-18 22:02:19,152 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 22:02:19,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 22:02:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-18 22:02:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:02:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-18 22:02:19,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-18 22:02:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:19,159 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-18 22:02:19,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:02:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-18 22:02:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 22:02:19,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:19,160 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:19,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:02:19,161 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:19,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-08-18 22:02:19,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:19,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217582445] [2020-08-18 22:02:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:19,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217582445] [2020-08-18 22:02:19,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:19,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:02:19,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483947470] [2020-08-18 22:02:19,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:02:19,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:19,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:02:19,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:19,237 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-18 22:02:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:19,291 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-18 22:02:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:02:19,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-18 22:02:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:19,293 INFO L225 Difference]: With dead ends: 42 [2020-08-18 22:02:19,293 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 22:02:19,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:19,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 22:02:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 22:02:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 22:02:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-18 22:02:19,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-18 22:02:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:19,300 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-18 22:02:19,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:02:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-18 22:02:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 22:02:19,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:19,301 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:19,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:02:19,302 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-08-18 22:02:19,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:19,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705632108] [2020-08-18 22:02:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:19,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705632108] [2020-08-18 22:02:19,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:19,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:02:19,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379973480] [2020-08-18 22:02:19,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:02:19,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:19,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:02:19,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:02:19,379 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-18 22:02:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:19,429 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-18 22:02:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:02:19,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-18 22:02:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:19,431 INFO L225 Difference]: With dead ends: 45 [2020-08-18 22:02:19,431 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 22:02:19,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:02:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 22:02:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-18 22:02:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 22:02:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 22:02:19,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-18 22:02:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:19,438 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 22:02:19,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:02:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 22:02:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 22:02:19,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:19,440 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:19,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:02:19,440 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-08-18 22:02:19,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:19,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052357939] [2020-08-18 22:02:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:19,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052357939] [2020-08-18 22:02:19,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:19,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:02:19,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654351542] [2020-08-18 22:02:19,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:02:19,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:02:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:02:19,566 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-18 22:02:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:19,627 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-18 22:02:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:02:19,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-18 22:02:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:19,629 INFO L225 Difference]: With dead ends: 48 [2020-08-18 22:02:19,629 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 22:02:19,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:02:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 22:02:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 22:02:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 22:02:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-18 22:02:19,635 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-18 22:02:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:19,635 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-18 22:02:19,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:02:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-18 22:02:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 22:02:19,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:19,636 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:19,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:02:19,637 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-08-18 22:02:19,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:19,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521233842] [2020-08-18 22:02:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:19,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521233842] [2020-08-18 22:02:19,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:19,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:02:19,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354135160] [2020-08-18 22:02:19,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:02:19,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:02:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:02:19,736 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-18 22:02:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:19,799 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-18 22:02:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:02:19,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-18 22:02:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:19,801 INFO L225 Difference]: With dead ends: 51 [2020-08-18 22:02:19,801 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 22:02:19,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:02:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 22:02:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-18 22:02:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 22:02:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-18 22:02:19,807 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-18 22:02:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:19,807 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-18 22:02:19,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:02:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-18 22:02:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 22:02:19,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:19,809 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:19,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:02:19,809 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-08-18 22:02:19,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:19,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725040134] [2020-08-18 22:02:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:02:19,825 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:02:19,825 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:02:19,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:02:19,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:02:19 BoogieIcfgContainer [2020-08-18 22:02:19,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:02:19,851 INFO L168 Benchmark]: Toolchain (without parser) took 3193.18 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 103.1 MB in the beginning and 176.8 MB in the end (delta: -73.6 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:19,851 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 22:02:19,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.14 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:19,853 INFO L168 Benchmark]: Boogie Preprocessor took 105.87 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 184.0 MB in the end (delta: -90.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:19,854 INFO L168 Benchmark]: RCFGBuilder took 259.73 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:19,854 INFO L168 Benchmark]: TraceAbstraction took 2599.43 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 170.8 MB in the beginning and 176.8 MB in the end (delta: -6.0 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:19,858 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 223.14 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.87 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 184.0 MB in the end (delta: -90.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.73 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2599.43 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 170.8 MB in the beginning and 176.8 MB in the end (delta: -6.0 MB). Peak memory consumption was 36.0 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: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 59 SDslu, 484 SDs, 0 SdLazy, 391 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, 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, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 16404 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 86/415 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 incorrect! Received shutdown request...