/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=DEEPEST -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 21:13:50,345 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 21:13:50,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:13:50,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:13:50,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:13:50,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:13:50,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:13:50,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:13:50,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:13:50,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:13:50,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:13:50,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:13:50,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:13:50,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:13:50,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:13:50,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:13:50,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:13:50,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:13:50,463 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 21:13:50,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:13:50,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:13:50,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:13:50,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:13:50,510 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:13:50,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:13:50,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:13:50,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:13:50,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:13:50,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:13:50,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:13:50,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:13:50,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:13:50,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:13:50,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:13:50,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:13:50,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:13:50,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:13:50,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:13:50,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:13:50,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:13:50,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:13:50,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:13:50,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:13:50,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:13:50,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:13:50,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:13:50,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:13:50,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:13:50,516 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:13:50,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:13:50,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:13:50,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:13:50,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:13:50,872 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:13:50,873 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-18 21:13:50,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7c570a1/144cb751a9e14e588b88c39b3ef1e09e/FLAG2532dc6b7 [2020-08-18 21:13:51,373 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:13:51,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-08-18 21:13:51,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7c570a1/144cb751a9e14e588b88c39b3ef1e09e/FLAG2532dc6b7 [2020-08-18 21:13:51,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7c570a1/144cb751a9e14e588b88c39b3ef1e09e [2020-08-18 21:13:51,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:13:51,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:13:51,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:13:51,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:13:51,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:13:51,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:13:51" (1/1) ... [2020-08-18 21:13:51,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78985504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:51, skipping insertion in model container [2020-08-18 21:13:51,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:13:51" (1/1) ... [2020-08-18 21:13:51,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:13:51,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:13:51,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:13:51,983 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:13:51,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:13:52,014 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:13:52,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52 WrapperNode [2020-08-18 21:13:52,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:13:52,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:13:52,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:13:52,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:13:52,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (1/1) ... [2020-08-18 21:13:52,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (1/1) ... [2020-08-18 21:13:52,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (1/1) ... [2020-08-18 21:13:52,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (1/1) ... [2020-08-18 21:13:52,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (1/1) ... [2020-08-18 21:13:52,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (1/1) ... [2020-08-18 21:13:52,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (1/1) ... [2020-08-18 21:13:52,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:13:52,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:13:52,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:13:52,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:13:52,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (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 21:13:52,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:13:52,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:13:52,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 21:13:52,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:13:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:13:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 21:13:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 21:13:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:13:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:13:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:13:52,381 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:13:52,382 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:13:52,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:13:52 BoogieIcfgContainer [2020-08-18 21:13:52,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:13:52,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:13:52,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:13:52,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:13:52,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:13:51" (1/3) ... [2020-08-18 21:13:52,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29ded5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:13:52, skipping insertion in model container [2020-08-18 21:13:52,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:13:52" (2/3) ... [2020-08-18 21:13:52,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29ded5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:13:52, skipping insertion in model container [2020-08-18 21:13:52,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:13:52" (3/3) ... [2020-08-18 21:13:52,395 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-18 21:13:52,407 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:13:52,415 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:13:52,430 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:13:52,461 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:13:52,461 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:13:52,461 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:13:52,462 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:13:52,462 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:13:52,462 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:13:52,463 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:13:52,463 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:13:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 21:13:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 21:13:52,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:52,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:52,499 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:52,508 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-18 21:13:52,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:52,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802539757] [2020-08-18 21:13:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:52,660 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 21:13:52,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802539757] [2020-08-18 21:13:52,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:13:52,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 21:13:52,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898072239] [2020-08-18 21:13:52,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 21:13:52,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 21:13:52,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 21:13:52,689 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 21:13:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:52,714 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-18 21:13:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 21:13:52,716 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 21:13:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:52,724 INFO L225 Difference]: With dead ends: 30 [2020-08-18 21:13:52,725 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 21:13:52,728 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 21:13:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 21:13:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 21:13:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 21:13:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-18 21:13:52,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-18 21:13:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:52,769 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-18 21:13:52,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 21:13:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-18 21:13:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 21:13:52,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:52,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:52,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:13:52,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:52,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:52,772 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-18 21:13:52,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:52,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204979462] [2020-08-18 21:13:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:52,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:52,866 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 21:13:52,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204979462] [2020-08-18 21:13:52,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:13:52,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:13:52,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855932150] [2020-08-18 21:13:52,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:13:52,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:13:52,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:13:52,871 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-18 21:13:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:52,918 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-18 21:13:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:13:52,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 21:13:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:52,921 INFO L225 Difference]: With dead ends: 21 [2020-08-18 21:13:52,921 INFO L226 Difference]: Without dead ends: 16 [2020-08-18 21:13:52,922 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 21:13:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-18 21:13:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-18 21:13:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 21:13:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-18 21:13:52,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-18 21:13:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:52,928 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-18 21:13:52,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:13:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-18 21:13:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:13:52,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:52,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:52,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:13:52,930 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-18 21:13:52,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:52,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546426316] [2020-08-18 21:13:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,215 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 21:13:53,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546426316] [2020-08-18 21:13:53,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:53,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:13:53,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376138268] [2020-08-18 21:13:53,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:13:53,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:53,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:13:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:13:53,219 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-08-18 21:13:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:53,325 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-18 21:13:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:13:53,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-08-18 21:13:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:53,328 INFO L225 Difference]: With dead ends: 28 [2020-08-18 21:13:53,329 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 21:13:53,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:13:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 21:13:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-18 21:13:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 21:13:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-18 21:13:53,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-18 21:13:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:53,337 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-18 21:13:53,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:13:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-18 21:13:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:13:53,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:53,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:53,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:13:53,339 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-18 21:13:53,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:53,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43191291] [2020-08-18 21:13:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,383 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 21:13:53,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43191291] [2020-08-18 21:13:53,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:13:53,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:13:53,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639083167] [2020-08-18 21:13:53,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:13:53,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:13:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:13:53,389 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-08-18 21:13:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:53,414 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-18 21:13:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:13:53,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 21:13:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:53,418 INFO L225 Difference]: With dead ends: 28 [2020-08-18 21:13:53,418 INFO L226 Difference]: Without dead ends: 17 [2020-08-18 21:13:53,419 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 21:13:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-18 21:13:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-18 21:13:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-18 21:13:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-18 21:13:53,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-08-18 21:13:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:53,430 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-18 21:13:53,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:13:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-18 21:13:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:13:53,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:53,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:53,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:13:53,432 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-08-18 21:13:53,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:53,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144022016] [2020-08-18 21:13:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,497 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 21:13:53,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144022016] [2020-08-18 21:13:53,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:53,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 21:13:53,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56454167] [2020-08-18 21:13:53,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:13:53,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:13:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:13:53,501 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-08-18 21:13:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:53,530 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-18 21:13:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:13:53,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-18 21:13:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:53,532 INFO L225 Difference]: With dead ends: 27 [2020-08-18 21:13:53,532 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 21:13:53,533 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 21:13:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 21:13:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-18 21:13:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 21:13:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 21:13:53,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-08-18 21:13:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:53,539 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 21:13:53,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:13:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 21:13:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:13:53,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:53,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:53,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:13:53,541 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-18 21:13:53,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:53,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697459768] [2020-08-18 21:13:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,761 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 21:13:53,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697459768] [2020-08-18 21:13:53,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:53,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:13:53,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187533550] [2020-08-18 21:13:53,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:13:53,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:53,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:13:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:13:53,764 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-08-18 21:13:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:53,922 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-18 21:13:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:13:53,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-08-18 21:13:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:53,924 INFO L225 Difference]: With dead ends: 27 [2020-08-18 21:13:53,924 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 21:13:53,924 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 21:13:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 21:13:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 21:13:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 21:13:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-18 21:13:53,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-18 21:13:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:53,930 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-18 21:13:53,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:13:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-18 21:13:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:13:53,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:53,932 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:53,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:13:53,933 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:53,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-08-18 21:13:53,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:53,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326657602] [2020-08-18 21:13:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:53,987 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 21:13:53,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326657602] [2020-08-18 21:13:53,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:53,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:13:53,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641705133] [2020-08-18 21:13:53,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:13:53,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:53,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:13:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:13:53,993 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-18 21:13:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:54,035 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 21:13:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:13:54,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 21:13:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:54,037 INFO L225 Difference]: With dead ends: 33 [2020-08-18 21:13:54,038 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 21:13:54,039 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 21:13:54,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 21:13:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-18 21:13:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 21:13:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 21:13:54,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-18 21:13:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:54,045 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 21:13:54,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:13:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 21:13:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:13:54,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:54,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:54,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:13:54,047 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-08-18 21:13:54,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:54,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070882573] [2020-08-18 21:13:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,094 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 21:13:54,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070882573] [2020-08-18 21:13:54,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:54,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:13:54,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765380258] [2020-08-18 21:13:54,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:13:54,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:13:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:13:54,097 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-18 21:13:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:54,131 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-18 21:13:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:13:54,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 21:13:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:54,133 INFO L225 Difference]: With dead ends: 36 [2020-08-18 21:13:54,133 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 21:13:54,133 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 21:13:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 21:13:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 21:13:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 21:13:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-18 21:13:54,139 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-08-18 21:13:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:54,139 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-18 21:13:54,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:13:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-18 21:13:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:13:54,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:54,141 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:54,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:13:54,142 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:54,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-08-18 21:13:54,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:54,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094971824] [2020-08-18 21:13:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,201 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 21:13:54,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094971824] [2020-08-18 21:13:54,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:54,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:13:54,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289319723] [2020-08-18 21:13:54,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:13:54,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:54,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:13:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:13:54,204 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-18 21:13:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:54,248 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-18 21:13:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:13:54,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 21:13:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:54,249 INFO L225 Difference]: With dead ends: 39 [2020-08-18 21:13:54,250 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 21:13:54,250 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 21:13:54,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 21:13:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-18 21:13:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:13:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-18 21:13:54,256 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-18 21:13:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:54,257 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-18 21:13:54,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:13:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-18 21:13:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:13:54,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:54,258 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:54,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:13:54,258 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-08-18 21:13:54,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:54,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034847882] [2020-08-18 21:13:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,325 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 21:13:54,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034847882] [2020-08-18 21:13:54,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:54,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:13:54,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850517066] [2020-08-18 21:13:54,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:13:54,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:54,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:13:54,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:13:54,327 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-18 21:13:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:54,375 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-18 21:13:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:13:54,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-18 21:13:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:54,376 INFO L225 Difference]: With dead ends: 42 [2020-08-18 21:13:54,376 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 21:13:54,377 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 21:13:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 21:13:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 21:13:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 21:13:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-18 21:13:54,382 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-18 21:13:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:54,383 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-18 21:13:54,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:13:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-18 21:13:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 21:13:54,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:54,384 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:54,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:13:54,385 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:54,385 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-08-18 21:13:54,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:54,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251527680] [2020-08-18 21:13:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,461 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 21:13:54,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251527680] [2020-08-18 21:13:54,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:54,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:13:54,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395671967] [2020-08-18 21:13:54,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:13:54,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:13:54,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:13:54,464 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-18 21:13:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:54,521 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-18 21:13:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:13:54,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-18 21:13:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:54,522 INFO L225 Difference]: With dead ends: 45 [2020-08-18 21:13:54,522 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 21:13:54,523 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 21:13:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 21:13:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-18 21:13:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 21:13:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 21:13:54,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-18 21:13:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:54,529 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 21:13:54,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:13:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 21:13:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 21:13:54,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:54,531 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:54,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:13:54,531 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-08-18 21:13:54,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:54,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571050677] [2020-08-18 21:13:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,631 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 21:13:54,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571050677] [2020-08-18 21:13:54,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:54,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:13:54,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402077016] [2020-08-18 21:13:54,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:13:54,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:13:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:13:54,634 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-18 21:13:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:54,691 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-18 21:13:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:13:54,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-18 21:13:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:54,692 INFO L225 Difference]: With dead ends: 48 [2020-08-18 21:13:54,692 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 21:13:54,693 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 21:13:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 21:13:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 21:13:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 21:13:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-18 21:13:54,698 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-18 21:13:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:54,698 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-18 21:13:54,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:13:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-18 21:13:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 21:13:54,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:54,700 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:54,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:13:54,700 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-08-18 21:13:54,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:54,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457513955] [2020-08-18 21:13:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:13:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:13:54,794 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 21:13:54,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457513955] [2020-08-18 21:13:54,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:13:54,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:13:54,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583327215] [2020-08-18 21:13:54,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:13:54,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:13:54,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:13:54,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:13:54,797 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-18 21:13:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:13:54,857 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-18 21:13:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:13:54,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-18 21:13:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:13:54,859 INFO L225 Difference]: With dead ends: 51 [2020-08-18 21:13:54,859 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 21:13:54,859 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 21:13:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 21:13:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-18 21:13:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 21:13:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-18 21:13:54,865 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-18 21:13:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:13:54,866 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-18 21:13:54,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:13:54,866 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-18 21:13:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 21:13:54,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:13:54,867 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:13:54,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:13:54,867 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:13:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:13:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-08-18 21:13:54,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:13:54,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865510010] [2020-08-18 21:13:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:13:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:13:54,886 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:13:54,886 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:13:54,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:13:54,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:13:54 BoogieIcfgContainer [2020-08-18 21:13:54,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:13:54,926 INFO L168 Benchmark]: Toolchain (without parser) took 3150.07 ms. Allocated memory was 145.8 MB in the beginning and 247.5 MB in the end (delta: 101.7 MB). Free memory was 100.7 MB in the beginning and 183.5 MB in the end (delta: -82.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:13:54,928 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 21:13:54,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.09 ms. Allocated memory is still 145.8 MB. Free memory was 100.5 MB in the beginning and 91.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:13:54,931 INFO L168 Benchmark]: Boogie Preprocessor took 115.46 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 91.2 MB in the beginning and 180.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:13:54,938 INFO L168 Benchmark]: RCFGBuilder took 254.75 ms. Allocated memory is still 201.3 MB. Free memory was 180.3 MB in the beginning and 168.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:13:54,942 INFO L168 Benchmark]: TraceAbstraction took 2534.06 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 167.6 MB in the beginning and 183.5 MB in the end (delta: -15.9 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:13:54,947 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.09 ms. Allocated memory is still 145.8 MB. Free memory was 100.5 MB in the beginning and 91.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.46 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 91.2 MB in the beginning and 180.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.75 ms. Allocated memory is still 201.3 MB. Free memory was 180.3 MB in the beginning and 168.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2534.06 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 167.6 MB in the beginning and 183.5 MB in the end (delta: -15.9 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [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: 2.4s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s 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...