/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:22:29,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:22:29,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:22:29,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:22:29,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:22:29,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:22:29,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:22:29,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:22:29,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:22:29,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:22:29,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:22:29,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:22:29,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:22:29,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:22:29,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:22:29,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:22:29,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:22:29,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:22:29,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:22:29,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:22:29,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:22:29,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:22:29,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:22:29,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:22:29,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:22:29,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:22:29,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:22:29,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:22:29,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:22:29,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 17:22:29,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:22:29,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:22:29,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:22:29,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:22:29,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:22:29,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:22:29,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:22:29,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:22:29,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:22:29,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:22:29,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:22:29,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:22:29,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:22:29,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:22:29,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:22:29,764 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:22:29,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:22:29,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:22:29,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:22:29,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:22:29,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:22:29,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:22:29,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:22:29,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:22:29,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:22:29,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:22:29,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:22:29,768 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:22:29,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:22:29,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:22:29,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:22:29,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:22:29,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:22:29,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:22:29,769 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-17 17:22:30,075 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:22:30,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:22:30,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:22:30,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:22:30,098 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:22:30,099 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-07-17 17:22:30,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1282241/65c4e63fad9246a8aab7d50138f43d3e/FLAG171b2088c [2020-07-17 17:22:30,669 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:22:30,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-07-17 17:22:30,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1282241/65c4e63fad9246a8aab7d50138f43d3e/FLAG171b2088c [2020-07-17 17:22:31,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1282241/65c4e63fad9246a8aab7d50138f43d3e [2020-07-17 17:22:31,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:22:31,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:22:31,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:22:31,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:22:31,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:22:31,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614f8a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31, skipping insertion in model container [2020-07-17 17:22:31,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:22:31,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:22:31,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:22:31,283 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:22:31,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:22:31,309 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:22:31,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31 WrapperNode [2020-07-17 17:22:31,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:22:31,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:22:31,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:22:31,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:22:31,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... [2020-07-17 17:22:31,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:22:31,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:22:31,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:22:31,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:22:31,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 17:22:31,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:22:31,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:22:31,483 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-17 17:22:31,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:22:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:22:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-17 17:22:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:22:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:22:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:22:31,672 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:22:31,673 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:22:31,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:22:31 BoogieIcfgContainer [2020-07-17 17:22:31,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:22:31,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:22:31,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:22:31,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:22:31,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:22:31" (1/3) ... [2020-07-17 17:22:31,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280b37c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:22:31, skipping insertion in model container [2020-07-17 17:22:31,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:31" (2/3) ... [2020-07-17 17:22:31,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280b37c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:22:31, skipping insertion in model container [2020-07-17 17:22:31,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:22:31" (3/3) ... [2020-07-17 17:22:31,687 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-07-17 17:22:31,699 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:22:31,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:22:31,724 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:22:31,760 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:22:31,760 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:22:31,761 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:22:31,761 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:22:31,761 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:22:31,761 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:22:31,762 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:22:31,762 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:22:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-17 17:22:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 17:22:31,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:31,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:31,799 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:31,807 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-07-17 17:22:31,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:31,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325436481] [2020-07-17 17:22:31,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:22:32,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325436481] [2020-07-17 17:22:32,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:22:32,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:22:32,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316033998] [2020-07-17 17:22:32,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:22:32,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:22:32,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:22:32,127 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-17 17:22:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:32,309 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-17 17:22:32,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:22:32,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-17 17:22:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:32,333 INFO L225 Difference]: With dead ends: 39 [2020-07-17 17:22:32,334 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 17:22:32,344 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 [2020-07-17 17:22:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 17:22:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-17 17:22:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 17:22:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-17 17:22:32,393 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-07-17 17:22:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:32,394 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-17 17:22:32,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:22:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-17 17:22:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 17:22:32,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:32,397 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] [2020-07-17 17:22:32,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:22:32,398 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:32,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-07-17 17:22:32,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:32,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135448068] [2020-07-17 17:22:32,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-17 17:22:32,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135448068] [2020-07-17 17:22:32,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:32,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:22:32,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608423268] [2020-07-17 17:22:32,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:22:32,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:32,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:22:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:22:32,549 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-07-17 17:22:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:32,621 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-07-17 17:22:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:22:32,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-17 17:22:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:32,624 INFO L225 Difference]: With dead ends: 36 [2020-07-17 17:22:32,624 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 17:22:32,626 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 [2020-07-17 17:22:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 17:22:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 17:22:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 17:22:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-17 17:22:32,638 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-07-17 17:22:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:32,639 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-17 17:22:32,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:22:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-17 17:22:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 17:22:32,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:32,641 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] [2020-07-17 17:22:32,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:22:32,642 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-07-17 17:22:32,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:32,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787760394] [2020-07-17 17:22:32,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-17 17:22:32,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787760394] [2020-07-17 17:22:32,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:32,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:22:32,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198609308] [2020-07-17 17:22:32,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:22:32,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:32,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:22:32,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:22:32,820 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2020-07-17 17:22:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:32,902 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-07-17 17:22:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:22:32,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-17 17:22:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:32,905 INFO L225 Difference]: With dead ends: 41 [2020-07-17 17:22:32,905 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 17:22:32,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:22:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 17:22:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-17 17:22:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 17:22:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-17 17:22:32,918 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 36 [2020-07-17 17:22:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:32,919 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-17 17:22:32,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:22:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-17 17:22:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-17 17:22:32,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:32,922 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] [2020-07-17 17:22:32,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:22:32,922 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1021564803, now seen corresponding path program 3 times [2020-07-17 17:22:32,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:32,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279772597] [2020-07-17 17:22:32,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-17 17:22:33,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279772597] [2020-07-17 17:22:33,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:33,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:22:33,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335619258] [2020-07-17 17:22:33,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:22:33,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:33,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:22:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:22:33,164 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 8 states. [2020-07-17 17:22:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:33,263 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 17:22:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:22:33,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-07-17 17:22:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:33,266 INFO L225 Difference]: With dead ends: 46 [2020-07-17 17:22:33,266 INFO L226 Difference]: Without dead ends: 40 [2020-07-17 17:22:33,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:22:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-17 17:22:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-17 17:22:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 17:22:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-07-17 17:22:33,278 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 45 [2020-07-17 17:22:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:33,278 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-07-17 17:22:33,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:22:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-07-17 17:22:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-17 17:22:33,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:33,281 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] [2020-07-17 17:22:33,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:22:33,282 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -263249715, now seen corresponding path program 4 times [2020-07-17 17:22:33,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:33,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601271050] [2020-07-17 17:22:33,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-17 17:22:33,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601271050] [2020-07-17 17:22:33,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:33,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:22:33,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636569049] [2020-07-17 17:22:33,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:22:33,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:33,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:22:33,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:22:33,557 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 9 states. [2020-07-17 17:22:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:33,656 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-07-17 17:22:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:22:33,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-07-17 17:22:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:33,659 INFO L225 Difference]: With dead ends: 51 [2020-07-17 17:22:33,659 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 17:22:33,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:22:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 17:22:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 17:22:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 17:22:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 17:22:33,671 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 54 [2020-07-17 17:22:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:33,672 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 17:22:33,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:22:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 17:22:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-17 17:22:33,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:33,674 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] [2020-07-17 17:22:33,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:22:33,675 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1884999187, now seen corresponding path program 5 times [2020-07-17 17:22:33,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:33,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702624826] [2020-07-17 17:22:33,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-17 17:22:33,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702624826] [2020-07-17 17:22:33,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:33,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:22:33,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32621828] [2020-07-17 17:22:33,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:22:33,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:22:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:22:33,969 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 10 states. [2020-07-17 17:22:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:34,098 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-07-17 17:22:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:22:34,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-07-17 17:22:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:34,104 INFO L225 Difference]: With dead ends: 56 [2020-07-17 17:22:34,104 INFO L226 Difference]: Without dead ends: 50 [2020-07-17 17:22:34,106 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 [2020-07-17 17:22:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-17 17:22:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-17 17:22:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 17:22:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-07-17 17:22:34,131 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 63 [2020-07-17 17:22:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:34,132 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-07-17 17:22:34,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:22:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-07-17 17:22:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 17:22:34,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:34,134 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] [2020-07-17 17:22:34,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:22:34,135 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash -441437769, now seen corresponding path program 6 times [2020-07-17 17:22:34,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:34,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488518455] [2020-07-17 17:22:34,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-17 17:22:34,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488518455] [2020-07-17 17:22:34,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:34,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:22:34,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56239060] [2020-07-17 17:22:34,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:22:34,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:34,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:22:34,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:22:34,345 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-07-17 17:22:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:34,476 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-17 17:22:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:22:34,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-07-17 17:22:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:34,479 INFO L225 Difference]: With dead ends: 61 [2020-07-17 17:22:34,479 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 17:22:34,480 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 [2020-07-17 17:22:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 17:22:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-17 17:22:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 17:22:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-07-17 17:22:34,490 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 72 [2020-07-17 17:22:34,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:34,491 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-07-17 17:22:34,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:22:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-07-17 17:22:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-17 17:22:34,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:34,493 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] [2020-07-17 17:22:34,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:22:34,493 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 999943849, now seen corresponding path program 7 times [2020-07-17 17:22:34,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:34,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534055613] [2020-07-17 17:22:34,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-17 17:22:34,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534055613] [2020-07-17 17:22:34,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:34,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:22:34,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658884541] [2020-07-17 17:22:34,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:22:34,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:22:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:22:34,805 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 12 states. [2020-07-17 17:22:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:34,941 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-07-17 17:22:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:22:34,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-07-17 17:22:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:34,944 INFO L225 Difference]: With dead ends: 66 [2020-07-17 17:22:34,944 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 17:22:34,945 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 [2020-07-17 17:22:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 17:22:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-17 17:22:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 17:22:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-17 17:22:34,955 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 81 [2020-07-17 17:22:34,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:34,956 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-17 17:22:34,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:22:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-17 17:22:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-17 17:22:34,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:34,958 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] [2020-07-17 17:22:34,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:22:34,959 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1356134305, now seen corresponding path program 8 times [2020-07-17 17:22:34,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:34,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367915900] [2020-07-17 17:22:34,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-17 17:22:35,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367915900] [2020-07-17 17:22:35,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:35,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 17:22:35,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607982711] [2020-07-17 17:22:35,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 17:22:35,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 17:22:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:22:35,266 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-07-17 17:22:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:35,407 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-07-17 17:22:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 17:22:35,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-07-17 17:22:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:35,409 INFO L225 Difference]: With dead ends: 71 [2020-07-17 17:22:35,409 INFO L226 Difference]: Without dead ends: 65 [2020-07-17 17:22:35,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:22:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-17 17:22:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-07-17 17:22:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-17 17:22:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-07-17 17:22:35,420 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 90 [2020-07-17 17:22:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:35,420 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-07-17 17:22:35,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 17:22:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-07-17 17:22:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-17 17:22:35,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:35,423 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] [2020-07-17 17:22:35,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:22:35,423 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:35,424 INFO L82 PathProgramCache]: Analyzing trace with hash -928437697, now seen corresponding path program 9 times [2020-07-17 17:22:35,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:35,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496944625] [2020-07-17 17:22:35,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-17 17:22:35,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496944625] [2020-07-17 17:22:35,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:35,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:22:35,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070440437] [2020-07-17 17:22:35,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:22:35,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:22:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:22:35,775 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 14 states. [2020-07-17 17:22:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:35,964 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-17 17:22:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:22:35,965 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-07-17 17:22:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:35,966 INFO L225 Difference]: With dead ends: 76 [2020-07-17 17:22:35,967 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 17:22:35,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:22:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 17:22:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-17 17:22:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-17 17:22:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-07-17 17:22:35,978 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 99 [2020-07-17 17:22:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:35,979 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-07-17 17:22:35,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:22:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-07-17 17:22:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-17 17:22:35,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:35,980 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] [2020-07-17 17:22:35,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:22:35,981 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash -276966773, now seen corresponding path program 10 times [2020-07-17 17:22:35,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:35,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638187626] [2020-07-17 17:22:35,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-07-17 17:22:36,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638187626] [2020-07-17 17:22:36,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:36,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 17:22:36,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058179298] [2020-07-17 17:22:36,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 17:22:36,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 17:22:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-07-17 17:22:36,382 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 15 states. [2020-07-17 17:22:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:36,534 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-07-17 17:22:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 17:22:36,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-07-17 17:22:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:36,536 INFO L225 Difference]: With dead ends: 81 [2020-07-17 17:22:36,536 INFO L226 Difference]: Without dead ends: 75 [2020-07-17 17:22:36,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:22:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-17 17:22:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-17 17:22:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-17 17:22:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-17 17:22:36,548 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 108 [2020-07-17 17:22:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:36,549 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-17 17:22:36,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 17:22:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-17 17:22:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-17 17:22:36,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:36,551 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:36,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:22:36,551 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1749540651, now seen corresponding path program 11 times [2020-07-17 17:22:36,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:36,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646519658] [2020-07-17 17:22:36,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-07-17 17:22:37,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646519658] [2020-07-17 17:22:37,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:37,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 17:22:37,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984041984] [2020-07-17 17:22:37,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 17:22:37,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:37,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 17:22:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:22:37,002 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 16 states. [2020-07-17 17:22:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:37,213 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-07-17 17:22:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:22:37,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 117 [2020-07-17 17:22:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:37,215 INFO L225 Difference]: With dead ends: 86 [2020-07-17 17:22:37,216 INFO L226 Difference]: Without dead ends: 80 [2020-07-17 17:22:37,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-07-17 17:22:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-17 17:22:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-07-17 17:22:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-17 17:22:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-07-17 17:22:37,228 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 117 [2020-07-17 17:22:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:37,228 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-07-17 17:22:37,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 17:22:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-07-17 17:22:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-17 17:22:37,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:37,231 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:37,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:22:37,231 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1141580405, now seen corresponding path program 12 times [2020-07-17 17:22:37,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:37,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241633316] [2020-07-17 17:22:37,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-07-17 17:22:37,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241633316] [2020-07-17 17:22:37,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:37,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 17:22:37,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485054255] [2020-07-17 17:22:37,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 17:22:37,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:37,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 17:22:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-07-17 17:22:37,793 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 17 states. [2020-07-17 17:22:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:38,003 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-17 17:22:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 17:22:38,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 126 [2020-07-17 17:22:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:38,005 INFO L225 Difference]: With dead ends: 91 [2020-07-17 17:22:38,005 INFO L226 Difference]: Without dead ends: 85 [2020-07-17 17:22:38,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-07-17 17:22:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-17 17:22:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-17 17:22:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-17 17:22:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-07-17 17:22:38,027 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 126 [2020-07-17 17:22:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:38,028 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-07-17 17:22:38,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 17:22:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-07-17 17:22:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-17 17:22:38,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:38,030 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:38,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:22:38,031 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash 55997035, now seen corresponding path program 13 times [2020-07-17 17:22:38,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:38,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631382267] [2020-07-17 17:22:38,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-17 17:22:38,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631382267] [2020-07-17 17:22:38,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:38,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 17:22:38,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554270238] [2020-07-17 17:22:38,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 17:22:38,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:38,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 17:22:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-07-17 17:22:38,707 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 18 states. [2020-07-17 17:22:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:38,915 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-07-17 17:22:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 17:22:38,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2020-07-17 17:22:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:38,917 INFO L225 Difference]: With dead ends: 96 [2020-07-17 17:22:38,917 INFO L226 Difference]: Without dead ends: 90 [2020-07-17 17:22:38,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-07-17 17:22:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-17 17:22:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-17 17:22:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-17 17:22:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-17 17:22:38,927 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 135 [2020-07-17 17:22:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:38,928 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-17 17:22:38,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 17:22:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-17 17:22:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-07-17 17:22:38,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:38,930 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:38,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 17:22:38,930 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash 394086239, now seen corresponding path program 14 times [2020-07-17 17:22:38,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:38,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266199220] [2020-07-17 17:22:38,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-07-17 17:22:39,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266199220] [2020-07-17 17:22:39,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:39,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-17 17:22:39,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237858030] [2020-07-17 17:22:39,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 17:22:39,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 17:22:39,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-07-17 17:22:39,616 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 19 states. [2020-07-17 17:22:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:39,852 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2020-07-17 17:22:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:22:39,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 144 [2020-07-17 17:22:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:39,854 INFO L225 Difference]: With dead ends: 101 [2020-07-17 17:22:39,854 INFO L226 Difference]: Without dead ends: 95 [2020-07-17 17:22:39,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 17:22:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-17 17:22:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-07-17 17:22:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-17 17:22:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-07-17 17:22:39,864 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 144 [2020-07-17 17:22:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:39,864 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-07-17 17:22:39,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 17:22:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-07-17 17:22:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-07-17 17:22:39,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:39,866 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:39,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 17:22:39,867 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:39,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1047772929, now seen corresponding path program 15 times [2020-07-17 17:22:39,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:39,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082059119] [2020-07-17 17:22:39,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:39,954 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:22:39,955 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:22:39,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 17:22:40,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:22:40 BoogieIcfgContainer [2020-07-17 17:22:40,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:22:40,016 INFO L168 Benchmark]: Toolchain (without parser) took 8958.53 ms. Allocated memory was 138.9 MB in the beginning and 385.4 MB in the end (delta: 246.4 MB). Free memory was 103.7 MB in the beginning and 291.4 MB in the end (delta: -187.6 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:40,016 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:22:40,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.15 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:40,018 INFO L168 Benchmark]: Boogie Preprocessor took 23.63 ms. Allocated memory is still 138.9 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:40,019 INFO L168 Benchmark]: RCFGBuilder took 343.37 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.8 MB in the beginning and 170.9 MB in the end (delta: -78.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:40,023 INFO L168 Benchmark]: TraceAbstraction took 8333.40 ms. Allocated memory was 202.9 MB in the beginning and 385.4 MB in the end (delta: 182.5 MB). Free memory was 170.3 MB in the beginning and 291.4 MB in the end (delta: -121.1 MB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:40,026 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.15 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.63 ms. Allocated memory is still 138.9 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.37 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.8 MB in the beginning and 170.9 MB in the end (delta: -78.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8333.40 ms. Allocated memory was 202.9 MB in the beginning and 385.4 MB in the end (delta: 182.5 MB). Free memory was 170.3 MB in the beginning and 291.4 MB in the end (delta: -121.1 MB). Peak memory consumption was 61.4 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 = 15; VAL [a=15] [L13] int b = 0; VAL [a=15, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L4] COND TRUE n <= 0 VAL [\old(m)=15, \old(n)=0, m=15, n=0] [L5] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=14, \old(n)=1, \result=15, m=14, n=1, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=13, \old(n)=2, \result=15, m=13, n=2, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=12, \old(n)=3, \result=15, m=12, n=3, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=11, \old(n)=4, \result=15, m=11, n=4, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=10, \old(n)=5, \result=15, m=10, n=5, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=9, \old(n)=6, \result=15, m=9, n=6, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=8, \old(n)=7, \result=15, m=8, n=7, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=7, \old(n)=8, \result=15, m=7, n=8, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=6, \old(n)=9, \result=15, m=6, n=9, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=5, \old(n)=10, \result=15, m=5, n=10, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=4, \old(n)=11, \result=15, m=4, n=11, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=3, \old(n)=12, \result=15, m=3, n=12, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=2, \old(n)=13, \result=15, m=2, n=13, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=1, \old(n)=14, \result=15, m=1, n=14, sum(n - 1, m + 1)=15] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); VAL [\old(m)=0, \old(n)=15, \result=15, m=0, n=15, sum(n - 1, m + 1)=15] [L14] RET, EXPR sum(a, b) VAL [a=15, b=0, sum(a, b)=15] [L14] int result = sum(a, b); VAL [a=15, b=0, result=15, sum(a, b)=15] [L15] COND TRUE result == a + b VAL [a=15, b=0, result=15] [L16] __VERIFIER_error() VAL [a=15, b=0, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.2s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 273 SDtfs, 632 SDslu, 1188 SDs, 0 SdLazy, 558 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=15, 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, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1368 NumberOfCodeBlocks, 1368 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1200 ConstructedInterpolants, 0 QuantifiedInterpolants, 310200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 2135/4620 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...