/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/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:08:54,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:08:54,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:08:55,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:08:55,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:08:55,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:08:55,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:08:55,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:08:55,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:08:55,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:08:55,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:08:55,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:08:55,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:08:55,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:08:55,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:08:55,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:08:55,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:08:55,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:08:55,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:08:55,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:08:55,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:08:55,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:08:55,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:08:55,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:08:55,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:08:55,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:08:55,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:08:55,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:08:55,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:08:55,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:08:55,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:08:55,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:08:55,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:08:55,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:08:55,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:08:55,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:08:55,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:08:55,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:08:55,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:08:55,096 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:08:55,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:08:55,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:08:55,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:08:55,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:08:55,097 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:08:55,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:08:55,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:08:55,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:08:55,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:08:55,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:08:55,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:08:55,099 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 [2020-08-22 22:08:55,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:08:55,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:08:55,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:08:55,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:08:55,385 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:08:55,386 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-22 22:08:55,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126e8e953/c9e249b4aa1441f2ae74d3847cd4f942/FLAGfb68ab192 [2020-08-22 22:08:55,901 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:08:55,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-22 22:08:55,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126e8e953/c9e249b4aa1441f2ae74d3847cd4f942/FLAGfb68ab192 [2020-08-22 22:08:56,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126e8e953/c9e249b4aa1441f2ae74d3847cd4f942 [2020-08-22 22:08:56,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:08:56,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:08:56,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:08:56,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:08:56,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:08:56,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522d3de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56, skipping insertion in model container [2020-08-22 22:08:56,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:08:56,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:08:56,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:08:56,540 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:08:56,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:08:56,566 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:08:56,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56 WrapperNode [2020-08-22 22:08:56,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:08:56,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:08:56,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:08:56,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:08:56,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (1/1) ... [2020-08-22 22:08:56,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:08:56,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:08:56,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:08:56,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:08:56,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (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 [2020-08-22 22:08:56,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:08:56,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:08:56,756 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-22 22:08:56,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:08:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:08:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:08:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-22 22:08:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:08:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:08:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:08:56,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:08:56,931 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:08:56,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:08:56 BoogieIcfgContainer [2020-08-22 22:08:56,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:08:56,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:08:56,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:08:56,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:08:56,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:08:56" (1/3) ... [2020-08-22 22:08:56,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2ded99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:08:56, skipping insertion in model container [2020-08-22 22:08:56,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:08:56" (2/3) ... [2020-08-22 22:08:56,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2ded99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:08:56, skipping insertion in model container [2020-08-22 22:08:56,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:08:56" (3/3) ... [2020-08-22 22:08:56,943 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-08-22 22:08:56,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:08:56,961 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:08:56,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:08:56,997 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:08:56,997 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:08:56,997 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:08:56,998 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:08:56,998 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:08:56,998 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:08:56,998 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:08:56,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:08:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-08-22 22:08:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:08:57,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:57,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:57,026 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-08-22 22:08:57,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:57,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724598184] [2020-08-22 22:08:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:08:57,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724598184] [2020-08-22 22:08:57,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:08:57,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:08:57,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736138491] [2020-08-22 22:08:57,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:08:57,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:08:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:08:57,359 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-08-22 22:08:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:57,464 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-08-22 22:08:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:08:57,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:08:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:57,477 INFO L225 Difference]: With dead ends: 44 [2020-08-22 22:08:57,477 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 22:08:57,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:08:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 22:08:57,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 22:08:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 22:08:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 22:08:57,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-08-22 22:08:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:57,536 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 22:08:57,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:08:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 22:08:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 22:08:57,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:57,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:57,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:08:57,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:57,540 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-08-22 22:08:57,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:57,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338303028] [2020-08-22 22:08:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:08:57,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338303028] [2020-08-22 22:08:57,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:08:57,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:08:57,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354311648] [2020-08-22 22:08:57,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:08:57,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:57,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:08:57,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:08:57,621 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-08-22 22:08:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:57,691 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-08-22 22:08:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:08:57,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-22 22:08:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:57,694 INFO L225 Difference]: With dead ends: 36 [2020-08-22 22:08:57,694 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 22:08:57,696 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 [2020-08-22 22:08:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 22:08:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-08-22 22:08:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 22:08:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 22:08:57,708 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-08-22 22:08:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:57,709 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 22:08:57,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:08:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 22:08:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 22:08:57,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:57,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:57,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:08:57,712 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-08-22 22:08:57,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:57,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214648077] [2020-08-22 22:08:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 22:08:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 22:08:57,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214648077] [2020-08-22 22:08:57,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:57,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:08:57,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039347680] [2020-08-22 22:08:57,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:08:57,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:57,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:08:57,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:57,877 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-08-22 22:08:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:57,986 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-08-22 22:08:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:08:57,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-22 22:08:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:57,988 INFO L225 Difference]: With dead ends: 52 [2020-08-22 22:08:57,989 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 22:08:57,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 22:08:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 22:08:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 22:08:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-22 22:08:58,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33 [2020-08-22 22:08:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:58,003 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-22 22:08:58,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:08:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-22 22:08:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:08:58,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:58,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:58,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:08:58,006 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:58,007 INFO L82 PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times [2020-08-22 22:08:58,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:58,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258380771] [2020-08-22 22:08:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 22:08:58,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258380771] [2020-08-22 22:08:58,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:58,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:08:58,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820776765] [2020-08-22 22:08:58,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:08:58,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:08:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:08:58,155 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-08-22 22:08:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:58,286 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-08-22 22:08:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:08:58,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-08-22 22:08:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:58,290 INFO L225 Difference]: With dead ends: 56 [2020-08-22 22:08:58,290 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 22:08:58,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 22:08:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-08-22 22:08:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 22:08:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-08-22 22:08:58,309 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2020-08-22 22:08:58,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:58,309 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-08-22 22:08:58,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:08:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-08-22 22:08:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 22:08:58,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:58,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:58,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:08:58,313 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1274787059, now seen corresponding path program 2 times [2020-08-22 22:08:58,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:58,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995614249] [2020-08-22 22:08:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 22:08:58,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995614249] [2020-08-22 22:08:58,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:58,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:08:58,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118267092] [2020-08-22 22:08:58,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:08:58,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:58,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:08:58,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:08:58,472 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 8 states. [2020-08-22 22:08:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:58,621 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2020-08-22 22:08:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:08:58,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 22:08:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:58,624 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:08:58,624 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 22:08:58,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:08:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 22:08:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-08-22 22:08:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 22:08:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-08-22 22:08:58,644 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2020-08-22 22:08:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:58,644 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-08-22 22:08:58,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:08:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-08-22 22:08:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:08:58,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:58,647 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:58,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:08:58,648 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:58,648 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 3 times [2020-08-22 22:08:58,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:58,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873412318] [2020-08-22 22:08:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 22:08:58,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873412318] [2020-08-22 22:08:58,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:58,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:08:58,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98091426] [2020-08-22 22:08:58,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:08:58,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:08:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:08:58,808 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 7 states. [2020-08-22 22:08:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:58,918 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2020-08-22 22:08:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:08:58,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-22 22:08:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:58,921 INFO L225 Difference]: With dead ends: 89 [2020-08-22 22:08:58,922 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 22:08:58,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:08:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 22:08:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-08-22 22:08:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 22:08:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2020-08-22 22:08:58,941 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 52 [2020-08-22 22:08:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:58,942 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2020-08-22 22:08:58,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:08:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2020-08-22 22:08:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 22:08:58,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:58,946 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:58,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:08:58,946 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1883941443, now seen corresponding path program 4 times [2020-08-22 22:08:58,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:58,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807316821] [2020-08-22 22:08:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:08:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:08:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:08:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:08:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 130 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-08-22 22:08:59,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807316821] [2020-08-22 22:08:59,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:08:59,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:08:59,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219891005] [2020-08-22 22:08:59,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:08:59,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:08:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:08:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:08:59,412 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 11 states. [2020-08-22 22:08:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:08:59,779 INFO L93 Difference]: Finished difference Result 142 states and 213 transitions. [2020-08-22 22:08:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:08:59,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2020-08-22 22:08:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:08:59,783 INFO L225 Difference]: With dead ends: 142 [2020-08-22 22:08:59,783 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 22:08:59,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:08:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 22:08:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-08-22 22:08:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 22:08:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-08-22 22:08:59,800 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 123 [2020-08-22 22:08:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:08:59,801 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-08-22 22:08:59,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:08:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-08-22 22:08:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-22 22:08:59,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:08:59,804 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:08:59,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:08:59,805 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:08:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:08:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash 532445701, now seen corresponding path program 5 times [2020-08-22 22:08:59,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:08:59,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391665659] [2020-08-22 22:08:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:08:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:08:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:08:59,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:08:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:09:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:09:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:09:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:09:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 375 proven. 413 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2020-08-22 22:09:00,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391665659] [2020-08-22 22:09:00,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:00,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:09:00,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795063957] [2020-08-22 22:09:00,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:09:00,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:09:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:09:00,399 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 13 states. [2020-08-22 22:09:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:00,853 INFO L93 Difference]: Finished difference Result 149 states and 204 transitions. [2020-08-22 22:09:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:09:00,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 193 [2020-08-22 22:09:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:00,856 INFO L225 Difference]: With dead ends: 149 [2020-08-22 22:09:00,857 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 22:09:00,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:09:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 22:09:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-08-22 22:09:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 22:09:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-08-22 22:09:00,876 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 193 [2020-08-22 22:09:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:00,877 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-08-22 22:09:00,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:09:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-08-22 22:09:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 22:09:00,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:00,879 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:00,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:09:00,880 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1618484333, now seen corresponding path program 6 times [2020-08-22 22:09:00,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:00,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409583010] [2020-08-22 22:09:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:00,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:09:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:09:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:09:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2020-08-22 22:09:01,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409583010] [2020-08-22 22:09:01,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:01,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:09:01,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068705004] [2020-08-22 22:09:01,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:09:01,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:09:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:09:01,427 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 16 states. [2020-08-22 22:09:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:02,056 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-08-22 22:09:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 22:09:02,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 140 [2020-08-22 22:09:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:02,059 INFO L225 Difference]: With dead ends: 103 [2020-08-22 22:09:02,060 INFO L226 Difference]: Without dead ends: 97 [2020-08-22 22:09:02,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:09:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-22 22:09:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-08-22 22:09:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 22:09:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-08-22 22:09:02,081 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 140 [2020-08-22 22:09:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:02,081 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-08-22 22:09:02,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:09:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-08-22 22:09:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-22 22:09:02,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:02,085 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:02,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:09:02,085 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1853518064, now seen corresponding path program 7 times [2020-08-22 22:09:02,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:02,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45826283] [2020-08-22 22:09:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:09:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:09:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:09:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 22:09:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 285 proven. 207 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-08-22 22:09:02,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45826283] [2020-08-22 22:09:02,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:02,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:09:02,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807722795] [2020-08-22 22:09:02,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:09:02,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:09:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:09:02,486 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 10 states. [2020-08-22 22:09:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:02,709 INFO L93 Difference]: Finished difference Result 171 states and 210 transitions. [2020-08-22 22:09:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 22:09:02,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 175 [2020-08-22 22:09:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:02,712 INFO L225 Difference]: With dead ends: 171 [2020-08-22 22:09:02,712 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 22:09:02,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:09:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 22:09:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-08-22 22:09:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 22:09:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-08-22 22:09:02,746 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 175 [2020-08-22 22:09:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:02,748 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-08-22 22:09:02,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:09:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-08-22 22:09:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-08-22 22:09:02,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:02,754 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:02,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:09:02,755 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2080077336, now seen corresponding path program 8 times [2020-08-22 22:09:02,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:02,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053422063] [2020-08-22 22:09:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:09:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:09:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:09:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 22:09:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:09:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 22:09:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:09:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:09:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:09:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2955 backedges. 552 proven. 920 refuted. 0 times theorem prover too weak. 1483 trivial. 0 not checked. [2020-08-22 22:09:03,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053422063] [2020-08-22 22:09:03,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:03,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:09:03,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557231183] [2020-08-22 22:09:03,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:09:03,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:09:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:09:03,489 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 15 states. [2020-08-22 22:09:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:04,005 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2020-08-22 22:09:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 22:09:04,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 281 [2020-08-22 22:09:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:04,007 INFO L225 Difference]: With dead ends: 139 [2020-08-22 22:09:04,007 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:09:04,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:09:04,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:09:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:09:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:09:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:09:04,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2020-08-22 22:09:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:04,010 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:09:04,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:09:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:09:04,011 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:09:04,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:09:04,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:09:04,878 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-08-22 22:09:05,179 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-08-22 22:09:05,411 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-08-22 22:09:05,817 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-08-22 22:09:06,141 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-08-22 22:09:06,393 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-08-22 22:09:06,585 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-08-22 22:09:06,846 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-08-22 22:09:06,901 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:09:06,901 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:09:06,901 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:09:06,902 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 22:09:06,902 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 22:09:06,902 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:09:06,902 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) the Hoare annotation is: false [2020-08-22 22:09:06,902 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-08-22 22:09:06,902 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-08-22 22:09:06,903 INFO L264 CegarLoopResult]: At program point L26(lines 26 28) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0) (<= 5 main_~result~0) (<= main_~result~0 5)) [2020-08-22 22:09:06,903 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-22 22:09:06,903 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 23 30) the Hoare annotation is: (<= 5 main_~x~0) [2020-08-22 22:09:06,903 INFO L264 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0)) [2020-08-22 22:09:06,903 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 28) the Hoare annotation is: (<= 5 main_~x~0) [2020-08-22 22:09:06,903 INFO L264 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0)) [2020-08-22 22:09:06,903 INFO L264 CegarLoopResult]: At program point L25-3(line 25) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0) (<= 5 main_~result~0) (<= main_~result~0 5)) [2020-08-22 22:09:06,904 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 23 30) the Hoare annotation is: (<= 5 main_~x~0) [2020-08-22 22:09:06,904 INFO L264 CegarLoopResult]: At program point fiboEXIT(lines 5 13) the Hoare annotation is: (let ((.cse0 (<= |fibo_#in~n| 3))) (and (or (not (<= |fibo_#in~n| 4)) (and (<= |fibo_#res| 3) (<= 3 |fibo_#res|)) .cse0) (let ((.cse1 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= 5 |fibo_#res|) .cse1 (<= |fibo_#res| 5)) (and (<= fibo_~n 4) .cse1))) (or (and (<= 0 |fibo_#res|) (<= |fibo_#res| 0)) (<= 1 |fibo_#in~n|)) (or (<= |fibo_#in~n| 0) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2) (<= 3 |fibo_#in~n|)) (and (<= 1 |fibo_#res|) (<= |fibo_#res| 1) (<= |fibo_#in~n| 2)) (not .cse0)))) [2020-08-22 22:09:06,904 INFO L264 CegarLoopResult]: At program point fiboFINAL(lines 5 13) the Hoare annotation is: (let ((.cse0 (<= |fibo_#in~n| 3))) (and (or (not (<= |fibo_#in~n| 4)) (and (<= |fibo_#res| 3) (<= 3 |fibo_#res|)) .cse0) (let ((.cse1 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= 5 |fibo_#res|) .cse1 (<= |fibo_#res| 5)) (and (<= fibo_~n 4) .cse1))) (or (and (<= 0 |fibo_#res|) (<= |fibo_#res| 0)) (<= 1 |fibo_#in~n|)) (or (<= |fibo_#in~n| 0) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2) (<= 3 |fibo_#in~n|)) (and (<= 1 |fibo_#res|) (<= |fibo_#res| 1) (<= |fibo_#in~n| 2)) (not .cse0)))) [2020-08-22 22:09:06,905 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) (not (<= |fibo_#in~n| 1))) [2020-08-22 22:09:06,905 INFO L264 CegarLoopResult]: At program point L11-1(line 11) the Hoare annotation is: (let ((.cse0 (<= |fibo_#in~n| 3))) (and (or (and (<= 1 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 1)) (not .cse0)) (let ((.cse1 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= fibo_~n 4) .cse1) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) .cse1))) (not (<= |fibo_#in~n| 1)) (or (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (not (<= |fibo_#in~n| 4)) .cse0))) [2020-08-22 22:09:06,905 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (let ((.cse0 (<= |fibo_#in~n| 1))) (and (or (not (<= |fibo_#in~n| 5)) .cse0) (or (and (= fibo_~n |fibo_#in~n|) (<= 1 |fibo_#in~n|)) (not .cse0)))) [2020-08-22 22:09:06,905 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= |fibo_#in~n| 3))) (and (or (and (<= 1 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 1)) (not .cse0)) (let ((.cse1 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= fibo_~n 4) .cse1) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) .cse1))) (not (<= |fibo_#in~n| 1)) (or (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (not (<= |fibo_#in~n| 4)) .cse0))) [2020-08-22 22:09:06,906 INFO L264 CegarLoopResult]: At program point L8(lines 8 12) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) (<= 1 |fibo_#in~n|)) [2020-08-22 22:09:06,906 INFO L264 CegarLoopResult]: At program point L11-3(line 11) the Hoare annotation is: (let ((.cse4 (<= 1 |fibo_#t~ret0|)) (.cse2 (+ |fibo_#t~ret0| |fibo_#t~ret1|)) (.cse5 (<= |fibo_#t~ret0| 1)) (.cse1 (<= |fibo_#in~n| 2))) (let ((.cse0 (and .cse4 (<= 1 .cse2) (<= .cse2 1) .cse5 .cse1)) (.cse3 (<= |fibo_#in~n| 3))) (and (or .cse0 (not .cse1)) (or (not (<= |fibo_#in~n| 4)) (and (<= .cse2 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) (<= 3 .cse2)) .cse3) (or .cse0 (not .cse3) (and (<= 2 .cse2) .cse4 (<= .cse2 2) .cse5)) (let ((.cse6 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= .cse2 5) (<= |fibo_#t~ret0| 3) (<= 5 .cse2) .cse6) (and (<= fibo_~n 4) .cse6))) (not (<= |fibo_#in~n| 1))))) [2020-08-22 22:09:06,906 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 2)) (and (<= |fibo_#in~n| 0) (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (not (<= 3 |fibo_#in~n|)))) [2020-08-22 22:09:06,907 INFO L264 CegarLoopResult]: At program point L11-4(line 11) the Hoare annotation is: (let ((.cse4 (<= 1 |fibo_#t~ret0|)) (.cse2 (+ |fibo_#t~ret0| |fibo_#t~ret1|)) (.cse5 (<= |fibo_#t~ret0| 1)) (.cse1 (<= |fibo_#in~n| 2))) (let ((.cse0 (and .cse4 (<= 1 .cse2) (<= .cse2 1) .cse5 .cse1)) (.cse3 (<= |fibo_#in~n| 3))) (and (or .cse0 (not .cse1)) (or (not (<= |fibo_#in~n| 4)) (and (<= .cse2 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) (<= 3 .cse2)) .cse3) (or .cse0 (not .cse3) (and (<= 2 .cse2) .cse4 (<= .cse2 2) .cse5)) (let ((.cse6 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= .cse2 5) (<= |fibo_#t~ret0| 3) (<= 5 .cse2) .cse6) (and (<= fibo_~n 4) .cse6))) (not (<= |fibo_#in~n| 1))))) [2020-08-22 22:09:06,907 INFO L264 CegarLoopResult]: At program point L6(lines 6 12) the Hoare annotation is: (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) [2020-08-22 22:09:06,907 INFO L264 CegarLoopResult]: At program point L11-5(line 11) the Hoare annotation is: (let ((.cse1 (<= |fibo_#in~n| 3)) (.cse0 (+ |fibo_#t~ret0| |fibo_#t~ret1|))) (and (or (not (<= |fibo_#in~n| 4)) (and (<= .cse0 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#res| 3) (<= |fibo_#t~ret0| 2) (<= 3 .cse0) (<= 3 |fibo_#res|)) .cse1) (let ((.cse2 (<= 1 |fibo_#t~ret0|)) (.cse3 (<= |fibo_#t~ret0| 1))) (or (and (<= 1 |fibo_#res|) .cse2 (<= 1 .cse0) (<= .cse0 1) .cse3 (<= |fibo_#res| 1) (<= |fibo_#in~n| 2)) (and (<= 2 .cse0) .cse2 (<= 2 |fibo_#res|) (<= .cse0 2) .cse3 (<= |fibo_#res| 2) (<= 3 |fibo_#in~n|)) (not .cse1))) (let ((.cse4 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#res|) (<= .cse0 5) (<= |fibo_#t~ret0| 3) (<= 5 .cse0) .cse4 (<= |fibo_#res| 5)) (and (<= fibo_~n 4) .cse4))) (not (<= |fibo_#in~n| 1)))) [2020-08-22 22:09:06,908 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-08-22 22:09:06,908 INFO L264 CegarLoopResult]: At program point L11-6(line 11) the Hoare annotation is: (let ((.cse3 (<= 1 |fibo_#t~ret0|)) (.cse4 (<= |fibo_#t~ret0| 1)) (.cse5 (<= |fibo_#in~n| 2))) (let ((.cse0 (<= |fibo_#in~n| 3)) (.cse2 (and (<= 1 |fibo_#res|) .cse3 (<= 2 |fibo_#in~n|) .cse4 (<= |fibo_#res| 1) .cse5))) (and (or (not (<= |fibo_#in~n| 4)) (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#res| 3) (<= |fibo_#t~ret0| 2) (<= 3 |fibo_#res|)) .cse0) (let ((.cse1 (= fibo_~n |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 5)) (and (<= fibo_~n 4) .cse1) (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#res|) (<= |fibo_#t~ret0| 3) .cse1 (<= |fibo_#res| 5)))) (or .cse2 (not .cse0) (and .cse3 (<= 2 |fibo_#res|) .cse4 (<= |fibo_#res| 2))) (or (not .cse5) .cse2)))) [2020-08-22 22:09:06,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:09:06 BoogieIcfgContainer [2020-08-22 22:09:06,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:09:06,935 INFO L168 Benchmark]: Toolchain (without parser) took 10595.39 ms. Allocated memory was 140.5 MB in the beginning and 405.3 MB in the end (delta: 264.8 MB). Free memory was 103.9 MB in the beginning and 345.9 MB in the end (delta: -242.0 MB). Peak memory consumption was 273.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:06,936 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 22:09:06,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.18 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:06,937 INFO L168 Benchmark]: Boogie Preprocessor took 21.36 ms. Allocated memory is still 140.5 MB. Free memory was 94.3 MB in the beginning and 93.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:06,938 INFO L168 Benchmark]: RCFGBuilder took 345.29 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 169.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:06,939 INFO L168 Benchmark]: TraceAbstraction took 9997.15 ms. Allocated memory was 203.4 MB in the beginning and 405.3 MB in the end (delta: 201.9 MB). Free memory was 169.2 MB in the beginning and 345.9 MB in the end (delta: -176.7 MB). Peak memory consumption was 275.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:06,943 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.18 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.36 ms. Allocated memory is still 140.5 MB. Free memory was 94.3 MB in the beginning and 93.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.29 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 169.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9997.15 ms. Allocated memory was 203.4 MB in the beginning and 405.3 MB in the end (delta: 201.9 MB). Free memory was 169.2 MB in the beginning and 345.9 MB in the end (delta: -176.7 MB). Peak memory consumption was 275.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main: 5 <= x - ProcedureContractResult [Line: 5]: Procedure Contract for fibo Derived contract for procedure fibo: ((((!(\old(n) <= 4) || (\result <= 3 && 3 <= \result)) || \old(n) <= 3) && ((!(\old(n) <= 5) || ((5 <= \result && n == \old(n)) && \result <= 5)) || (n <= 4 && n == \old(n)))) && ((0 <= \result && \result <= 0) || 1 <= \old(n))) && (((\old(n) <= 0 || ((2 <= \result && \result <= 2) && 3 <= \old(n))) || ((1 <= \result && \result <= 1) && \old(n) <= 2)) || !(\old(n) <= 3)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.0s, OverallIterations: 11, TraceHistogramMax: 31, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 348 SDtfs, 527 SDslu, 1454 SDs, 0 SdLazy, 1310 SolverSat, 214 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 463 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=9, 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, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 703 PreInvPairs, 1073 NumberOfFragments, 922 HoareAnnotationTreeSize, 703 FomulaSimplifications, 5774 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 31 FomulaSimplificationsInter, 2622 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1115 NumberOfCodeBlocks, 1115 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1104 ConstructedInterpolants, 0 QuantifiedInterpolants, 381696 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 4598/6595 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...