/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:30:46,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:30:46,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:30:46,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:30:46,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:30:46,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:30:46,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:30:46,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:30:46,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:30:46,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:30:46,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:30:46,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:30:46,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:30:46,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:30:46,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:30:46,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:30:46,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:30:46,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:30:46,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:30:46,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:30:46,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:30:46,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:30:46,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:30:46,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:30:46,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:30:46,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:30:46,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:30:46,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:30:46,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:30:46,886 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:30:46,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:30:46,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:30:46,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:30:46,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:30:46,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:30:46,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:30:46,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:30:46,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:30:46,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:30:46,890 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:30:46,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:30:46,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:30:46,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:30:46,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:30:46,891 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:30:46,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:30:46,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:30:46,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:30:46,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:30:46,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:30:46,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:30:46,892 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:30:47,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:30:47,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:30:47,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:30:47,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:30:47,354 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:30:47,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-09-04 16:30:47,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/875edc418/5feb5a1b34ed463eac215d80ed5faec8/FLAGadc3eb70f [2020-09-04 16:30:48,020 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:30:48,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-09-04 16:30:48,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/875edc418/5feb5a1b34ed463eac215d80ed5faec8/FLAGadc3eb70f [2020-09-04 16:30:48,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/875edc418/5feb5a1b34ed463eac215d80ed5faec8 [2020-09-04 16:30:48,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:30:48,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:30:48,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:30:48,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:30:48,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:30:48,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241b2e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48, skipping insertion in model container [2020-09-04 16:30:48,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:30:48,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:30:48,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:30:48,709 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:30:48,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:30:48,747 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:30:48,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48 WrapperNode [2020-09-04 16:30:48,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:30:48,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:30:48,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:30:48,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:30:48,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... [2020-09-04 16:30:48,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:30:48,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:30:48,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:30:48,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:30:48,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:30:48,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:30:48,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:30:48,941 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-04 16:30:48,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:30:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:30:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-04 16:30:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:30:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:30:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:30:49,182 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:30:49,183 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:30:49,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:30:49 BoogieIcfgContainer [2020-09-04 16:30:49,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:30:49,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:30:49,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:30:49,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:30:49,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:30:48" (1/3) ... [2020-09-04 16:30:49,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274dd397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:30:49, skipping insertion in model container [2020-09-04 16:30:49,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:30:48" (2/3) ... [2020-09-04 16:30:49,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274dd397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:30:49, skipping insertion in model container [2020-09-04 16:30:49,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:30:49" (3/3) ... [2020-09-04 16:30:49,236 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2020-09-04 16:30:49,271 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:30:49,294 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:30:49,332 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:30:49,359 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:30:49,360 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:30:49,360 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:30:49,360 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:30:49,360 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:30:49,360 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:30:49,361 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:30:49,361 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:30:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-04 16:30:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 16:30:49,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:49,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:49,393 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-09-04 16:30:49,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:49,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070338291] [2020-09-04 16:30:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:49,495 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:49,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:49,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:30:49,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070338291] [2020-09-04 16:30:49,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:49,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:30:49,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048134177] [2020-09-04 16:30:49,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:30:49,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:49,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:30:49,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:30:49,733 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-09-04 16:30:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:49,860 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-09-04 16:30:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:30:49,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-04 16:30:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:49,875 INFO L225 Difference]: With dead ends: 39 [2020-09-04 16:30:49,875 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 16:30:49,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:30:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 16:30:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 16:30:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 16:30:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-04 16:30:49,938 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-09-04 16:30:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:49,939 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-04 16:30:49,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:30:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-04 16:30:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 16:30:49,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:49,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:49,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:30:49,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:49,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-09-04 16:30:49,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:49,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962249847] [2020-09-04 16:30:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:49,947 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:49,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 16:30:50,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962249847] [2020-09-04 16:30:50,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:50,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:30:50,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313311695] [2020-09-04 16:30:50,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:30:50,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:30:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:30:50,095 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-09-04 16:30:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:50,169 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-09-04 16:30:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:30:50,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-09-04 16:30:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:50,171 INFO L225 Difference]: With dead ends: 36 [2020-09-04 16:30:50,172 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 16:30:50,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:30:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 16:30:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 16:30:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 16:30:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 16:30:50,186 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-09-04 16:30:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:50,186 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 16:30:50,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:30:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 16:30:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 16:30:50,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:50,189 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:50,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:30:50,189 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-09-04 16:30:50,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:50,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867827627] [2020-09-04 16:30:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:50,193 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-04 16:30:50,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867827627] [2020-09-04 16:30:50,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:50,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:30:50,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386998597] [2020-09-04 16:30:50,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:30:50,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:30:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:30:50,417 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2020-09-04 16:30:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:50,530 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-09-04 16:30:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:30:50,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 16:30:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:50,534 INFO L225 Difference]: With dead ends: 41 [2020-09-04 16:30:50,534 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 16:30:50,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:30:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 16:30:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-04 16:30:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 16:30:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-04 16:30:50,562 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 36 [2020-09-04 16:30:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:50,565 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-04 16:30:50,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:30:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-04 16:30:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 16:30:50,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:50,571 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:50,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:30:50,572 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1021564803, now seen corresponding path program 3 times [2020-09-04 16:30:50,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:50,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996114310] [2020-09-04 16:30:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:50,577 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-04 16:30:50,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996114310] [2020-09-04 16:30:50,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:50,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:30:50,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197084734] [2020-09-04 16:30:50,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:30:50,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:50,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:30:50,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:30:50,785 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 8 states. [2020-09-04 16:30:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:50,888 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 16:30:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 16:30:50,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-09-04 16:30:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:50,893 INFO L225 Difference]: With dead ends: 46 [2020-09-04 16:30:50,893 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 16:30:50,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:30:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 16:30:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-04 16:30:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 16:30:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-04 16:30:50,922 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 45 [2020-09-04 16:30:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:50,923 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-04 16:30:50,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:30:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-04 16:30:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 16:30:50,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:50,926 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:50,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:30:50,928 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:50,929 INFO L82 PathProgramCache]: Analyzing trace with hash -263249715, now seen corresponding path program 4 times [2020-09-04 16:30:50,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:50,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864989677] [2020-09-04 16:30:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:50,931 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:50,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-04 16:30:51,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864989677] [2020-09-04 16:30:51,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:51,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 16:30:51,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334008955] [2020-09-04 16:30:51,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 16:30:51,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 16:30:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:30:51,165 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 9 states. [2020-09-04 16:30:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:51,255 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-09-04 16:30:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 16:30:51,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-09-04 16:30:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:51,258 INFO L225 Difference]: With dead ends: 51 [2020-09-04 16:30:51,258 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 16:30:51,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:30:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 16:30:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 16:30:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 16:30:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 16:30:51,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 54 [2020-09-04 16:30:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:51,271 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 16:30:51,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 16:30:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 16:30:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-04 16:30:51,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:51,273 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:51,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:30:51,273 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1884999187, now seen corresponding path program 5 times [2020-09-04 16:30:51,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:51,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787547184] [2020-09-04 16:30:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:51,276 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-04 16:30:51,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787547184] [2020-09-04 16:30:51,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:51,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 16:30:51,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282705551] [2020-09-04 16:30:51,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 16:30:51,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 16:30:51,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:30:51,604 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 10 states. [2020-09-04 16:30:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:51,739 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-09-04 16:30:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:30:51,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-09-04 16:30:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:51,746 INFO L225 Difference]: With dead ends: 56 [2020-09-04 16:30:51,746 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 16:30:51,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:30:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 16:30:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-04 16:30:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 16:30:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-09-04 16:30:51,778 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 63 [2020-09-04 16:30:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:51,783 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-09-04 16:30:51,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 16:30:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-09-04 16:30:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 16:30:51,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:51,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:51,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:30:51,792 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash -441437769, now seen corresponding path program 6 times [2020-09-04 16:30:51,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:51,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730611771] [2020-09-04 16:30:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:51,795 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:51,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-04 16:30:52,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730611771] [2020-09-04 16:30:52,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:52,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 16:30:52,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633857513] [2020-09-04 16:30:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 16:30:52,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:52,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 16:30:52,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:30:52,113 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-09-04 16:30:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:52,267 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-09-04 16:30:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 16:30:52,268 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-09-04 16:30:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:52,270 INFO L225 Difference]: With dead ends: 61 [2020-09-04 16:30:52,270 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 16:30:52,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:30:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 16:30:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-04 16:30:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 16:30:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-09-04 16:30:52,281 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 72 [2020-09-04 16:30:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:52,282 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-09-04 16:30:52,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 16:30:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-09-04 16:30:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 16:30:52,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:52,284 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:52,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:30:52,285 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash 999943849, now seen corresponding path program 7 times [2020-09-04 16:30:52,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:52,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331183272] [2020-09-04 16:30:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:52,287 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-09-04 16:30:52,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331183272] [2020-09-04 16:30:52,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:52,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 16:30:52,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946957708] [2020-09-04 16:30:52,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 16:30:52,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:52,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 16:30:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:30:52,625 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 12 states. [2020-09-04 16:30:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:52,775 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-09-04 16:30:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 16:30:52,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-09-04 16:30:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:52,779 INFO L225 Difference]: With dead ends: 66 [2020-09-04 16:30:52,779 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 16:30:52,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-09-04 16:30:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 16:30:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-04 16:30:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 16:30:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 16:30:52,802 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 81 [2020-09-04 16:30:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:52,804 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 16:30:52,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 16:30:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 16:30:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-04 16:30:52,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:52,807 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:52,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:30:52,808 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1356134305, now seen corresponding path program 8 times [2020-09-04 16:30:52,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:52,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496674751] [2020-09-04 16:30:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:52,816 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:52,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-09-04 16:30:53,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496674751] [2020-09-04 16:30:53,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:53,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 16:30:53,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428219901] [2020-09-04 16:30:53,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 16:30:53,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 16:30:53,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-04 16:30:53,306 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-09-04 16:30:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:53,447 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-09-04 16:30:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 16:30:53,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-09-04 16:30:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:53,449 INFO L225 Difference]: With dead ends: 71 [2020-09-04 16:30:53,449 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 16:30:53,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:30:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 16:30:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-09-04 16:30:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-04 16:30:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-09-04 16:30:53,460 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 90 [2020-09-04 16:30:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:53,461 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-09-04 16:30:53,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 16:30:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-09-04 16:30:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-04 16:30:53,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:53,462 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:53,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:30:53,463 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash -928437697, now seen corresponding path program 9 times [2020-09-04 16:30:53,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:53,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546378985] [2020-09-04 16:30:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:53,465 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:30:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 16:30:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:30:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:30:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-09-04 16:30:53,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546378985] [2020-09-04 16:30:53,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:30:53,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 16:30:53,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792060841] [2020-09-04 16:30:53,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 16:30:53,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:30:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 16:30:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:30:53,850 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 14 states. [2020-09-04 16:30:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:30:54,016 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-09-04 16:30:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 16:30:54,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-09-04 16:30:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:30:54,019 INFO L225 Difference]: With dead ends: 76 [2020-09-04 16:30:54,019 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 16:30:54,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-09-04 16:30:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 16:30:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-04 16:30:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 16:30:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-09-04 16:30:54,031 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 99 [2020-09-04 16:30:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:30:54,031 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-09-04 16:30:54,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 16:30:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-09-04 16:30:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-04 16:30:54,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:30:54,033 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:30:54,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:30:54,034 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:30:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:30:54,034 INFO L82 PathProgramCache]: Analyzing trace with hash -276966773, now seen corresponding path program 10 times [2020-09-04 16:30:54,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:30:54,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244222495] [2020-09-04 16:30:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:30:54,037 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:30:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:30:54,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:30:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:30:54,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:30:54,150 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:30:54,150 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:30:54,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:30:54,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:30:54 BoogieIcfgContainer [2020-09-04 16:30:54,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:30:54,191 INFO L168 Benchmark]: Toolchain (without parser) took 5776.80 ms. Allocated memory was 138.4 MB in the beginning and 292.0 MB in the end (delta: 153.6 MB). Free memory was 103.1 MB in the beginning and 251.4 MB in the end (delta: -148.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:54,192 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:30:54,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.88 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:54,193 INFO L168 Benchmark]: Boogie Preprocessor took 36.11 ms. Allocated memory is still 138.4 MB. Free memory was 93.5 MB in the beginning and 92.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:54,194 INFO L168 Benchmark]: RCFGBuilder took 404.89 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 168.7 MB in the end (delta: -76.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:54,195 INFO L168 Benchmark]: TraceAbstraction took 4979.45 ms. Allocated memory was 200.8 MB in the beginning and 292.0 MB in the end (delta: 91.2 MB). Free memory was 168.0 MB in the beginning and 251.4 MB in the end (delta: -83.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:30:54,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.88 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.11 ms. Allocated memory is still 138.4 MB. Free memory was 93.5 MB in the beginning and 92.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.89 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 168.7 MB in the end (delta: -76.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4979.45 ms. Allocated memory was 200.8 MB in the beginning and 292.0 MB in the end (delta: 91.2 MB). Free memory was 168.0 MB in the beginning and 251.4 MB in the end (delta: -83.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 10; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 319 SDslu, 691 SDs, 0 SdLazy, 346 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...