/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:19:11,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:19:11,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:19:11,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:19:11,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:19:11,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:19:11,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:19:11,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:19:11,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:19:11,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:19:11,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:19:11,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:19:11,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:19:11,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:19:11,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:19:11,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:19:11,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:19:11,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:19:11,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:19:11,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:19:11,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:19:11,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:19:11,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:19:11,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:19:11,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:19:11,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:19:11,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:19:11,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:19:11,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:19:11,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 10:19:11,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:19:11,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:19:11,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:19:11,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:19:11,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:19:11,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:19:11,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:19:11,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:19:11,500 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:19:11,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:19:11,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:19:11,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:19:11,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:19:11,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:19:11,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:19:11,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:19:11,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:19:11,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:19:11,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:19:11,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:19:11,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:19:11,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:19:11,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:19:11,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:19:11,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:19:11,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:19:11,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:19:11,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:19:11,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:19:11,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:19:11,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:19:11,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:19:11,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:19:11,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:19:11,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:19:11,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:19:11,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:19:11,966 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:19:11,966 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:19:11,967 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-09-21 10:19:12,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b13cd14a8/d5f7f9a7633949f9b5c798ee24d85325/FLAG73a75ff5f [2020-09-21 10:19:12,557 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:19:12,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-09-21 10:19:12,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b13cd14a8/d5f7f9a7633949f9b5c798ee24d85325/FLAG73a75ff5f [2020-09-21 10:19:12,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b13cd14a8/d5f7f9a7633949f9b5c798ee24d85325 [2020-09-21 10:19:12,917 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:19:12,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:19:12,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:12,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:19:12,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:19:12,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:12" (1/1) ... [2020-09-21 10:19:12,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfcebea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:12, skipping insertion in model container [2020-09-21 10:19:12,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:12" (1/1) ... [2020-09-21 10:19:12,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:19:12,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:19:13,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:13,196 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:19:13,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:13,229 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:19:13,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13 WrapperNode [2020-09-21 10:19:13,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:13,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:19:13,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:19:13,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:19:13,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... [2020-09-21 10:19:13,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... [2020-09-21 10:19:13,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... [2020-09-21 10:19:13,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... [2020-09-21 10:19:13,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... [2020-09-21 10:19:13,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... [2020-09-21 10:19:13,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... [2020-09-21 10:19:13,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:19:13,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:19:13,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:19:13,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:19:13,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:19:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:19:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:19:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-21 10:19:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:19:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:19:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:19:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-21 10:19:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:19:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:19:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:19:13,609 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:19:13,610 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:19:13,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:13 BoogieIcfgContainer [2020-09-21 10:19:13,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:19:13,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:19:13,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:19:13,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:19:13,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:19:12" (1/3) ... [2020-09-21 10:19:13,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9d4e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:13, skipping insertion in model container [2020-09-21 10:19:13,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:13" (2/3) ... [2020-09-21 10:19:13,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9d4e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:13, skipping insertion in model container [2020-09-21 10:19:13,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:13" (3/3) ... [2020-09-21 10:19:13,629 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-09-21 10:19:13,641 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:19:13,651 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:19:13,674 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:19:13,705 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:19:13,705 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:19:13,706 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:19:13,706 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:19:13,706 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:19:13,706 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:19:13,706 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:19:13,707 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:19:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-21 10:19:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:19:13,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:13,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:13,740 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-09-21 10:19:13,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:13,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825522582] [2020-09-21 10:19:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:13,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:19:13,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825522582] [2020-09-21 10:19:13,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:13,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:19:13,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200420415] [2020-09-21 10:19:13,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:19:13,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:14,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:19:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:14,020 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-21 10:19:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:14,172 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-09-21 10:19:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:19:14,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:19:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:14,188 INFO L225 Difference]: With dead ends: 35 [2020-09-21 10:19:14,188 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:19:14,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:19:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:19:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 10:19:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:19:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-09-21 10:19:14,254 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-09-21 10:19:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:14,254 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-09-21 10:19:14,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:19:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-09-21 10:19:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:19:14,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:14,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:14,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:19:14,258 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-09-21 10:19:14,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:14,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475346468] [2020-09-21 10:19:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:19:14,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475346468] [2020-09-21 10:19:14,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:14,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:19:14,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251962706] [2020-09-21 10:19:14,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:19:14,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:19:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:14,341 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-09-21 10:19:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:14,427 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-09-21 10:19:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:19:14,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-21 10:19:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:14,429 INFO L225 Difference]: With dead ends: 27 [2020-09-21 10:19:14,429 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 10:19:14,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:19:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 10:19:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-09-21 10:19:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:19:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-09-21 10:19:14,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-09-21 10:19:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:14,440 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-09-21 10:19:14,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:19:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-09-21 10:19:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:19:14,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:14,442 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] [2020-09-21 10:19:14,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:19:14,442 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:14,443 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-09-21 10:19:14,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:14,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134196267] [2020-09-21 10:19:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:19:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 10:19:14,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134196267] [2020-09-21 10:19:14,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:14,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:19:14,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338549991] [2020-09-21 10:19:14,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:19:14,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:19:14,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:19:14,590 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-09-21 10:19:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:14,698 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-09-21 10:19:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:19:14,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-21 10:19:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:14,700 INFO L225 Difference]: With dead ends: 38 [2020-09-21 10:19:14,700 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 10:19:14,702 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 [2020-09-21 10:19:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 10:19:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-21 10:19:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 10:19:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-21 10:19:14,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-09-21 10:19:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:14,711 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-21 10:19:14,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:19:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-21 10:19:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:19:14,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:14,713 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] [2020-09-21 10:19:14,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:19:14,714 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-09-21 10:19:14,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:14,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017777490] [2020-09-21 10:19:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 10:19:14,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017777490] [2020-09-21 10:19:14,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:14,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:19:14,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535796303] [2020-09-21 10:19:14,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:19:14,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:19:14,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:19:14,909 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-09-21 10:19:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:15,044 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-09-21 10:19:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:19:15,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-09-21 10:19:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:15,047 INFO L225 Difference]: With dead ends: 41 [2020-09-21 10:19:15,047 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 10:19:15,048 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 [2020-09-21 10:19:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 10:19:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 10:19:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 10:19:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-09-21 10:19:15,060 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-09-21 10:19:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:15,061 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-09-21 10:19:15,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:19:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-09-21 10:19:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 10:19:15,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:15,064 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:15,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:19:15,064 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-09-21 10:19:15,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:15,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109098470] [2020-09-21 10:19:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-21 10:19:15,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109098470] [2020-09-21 10:19:15,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:15,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:19:15,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128473778] [2020-09-21 10:19:15,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:19:15,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:15,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:19:15,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:19:15,303 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-09-21 10:19:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:15,502 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-09-21 10:19:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:19:15,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-09-21 10:19:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:15,513 INFO L225 Difference]: With dead ends: 79 [2020-09-21 10:19:15,513 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 10:19:15,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:19:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 10:19:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-21 10:19:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:19:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-09-21 10:19:15,542 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-09-21 10:19:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:15,543 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-09-21 10:19:15,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:19:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-09-21 10:19:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:19:15,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:15,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:15,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:19:15,546 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-09-21 10:19:15,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:15,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212909351] [2020-09-21 10:19:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-21 10:19:15,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212909351] [2020-09-21 10:19:15,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:15,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:19:15,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671607938] [2020-09-21 10:19:15,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:19:15,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:19:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:19:15,752 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-09-21 10:19:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:15,880 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-09-21 10:19:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:19:15,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-09-21 10:19:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:15,883 INFO L225 Difference]: With dead ends: 65 [2020-09-21 10:19:15,883 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 10:19:15,884 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 [2020-09-21 10:19:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 10:19:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-21 10:19:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 10:19:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-09-21 10:19:15,900 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-09-21 10:19:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:15,900 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-09-21 10:19:15,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:19:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-09-21 10:19:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-21 10:19:15,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:15,904 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:15,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:19:15,905 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-09-21 10:19:15,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:15,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972715244] [2020-09-21 10:19:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:15,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:19:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 104 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-09-21 10:19:16,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972715244] [2020-09-21 10:19:16,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:16,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:19:16,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28455932] [2020-09-21 10:19:16,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:19:16,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:16,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:19:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:19:16,206 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-09-21 10:19:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:16,584 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-09-21 10:19:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:19:16,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-09-21 10:19:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:16,590 INFO L225 Difference]: With dead ends: 107 [2020-09-21 10:19:16,591 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 10:19:16,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:19:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 10:19:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-21 10:19:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 10:19:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-09-21 10:19:16,618 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-09-21 10:19:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:16,623 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-09-21 10:19:16,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:19:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-09-21 10:19:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-21 10:19:16,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:16,626 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:16,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:19:16,628 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:16,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:16,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-09-21 10:19:16,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:16,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941115504] [2020-09-21 10:19:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:19:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 10:19:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:19:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-09-21 10:19:17,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941115504] [2020-09-21 10:19:17,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:17,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:19:17,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625657715] [2020-09-21 10:19:17,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:19:17,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:19:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:19:17,275 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-09-21 10:19:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:17,732 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2020-09-21 10:19:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 10:19:17,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-09-21 10:19:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:17,735 INFO L225 Difference]: With dead ends: 114 [2020-09-21 10:19:17,735 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 10:19:17,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:19:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 10:19:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-09-21 10:19:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 10:19:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-09-21 10:19:17,748 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 136 [2020-09-21 10:19:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:17,749 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-09-21 10:19:17,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:19:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-09-21 10:19:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 10:19:17,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:17,751 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:17,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:19:17,752 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:17,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-09-21 10:19:17,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:17,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57982920] [2020-09-21 10:19:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:17,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:19:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 10:19:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-09-21 10:19:18,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57982920] [2020-09-21 10:19:18,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:18,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:19:18,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275276629] [2020-09-21 10:19:18,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:19:18,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:18,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:19:18,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:19:18,379 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 16 states. [2020-09-21 10:19:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:18,695 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-09-21 10:19:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:19:18,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-09-21 10:19:18,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:18,698 INFO L225 Difference]: With dead ends: 76 [2020-09-21 10:19:18,698 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 10:19:18,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:19:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 10:19:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-09-21 10:19:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-21 10:19:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-09-21 10:19:18,711 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 109 [2020-09-21 10:19:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:18,712 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-09-21 10:19:18,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:19:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-09-21 10:19:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-21 10:19:18,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:18,714 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:18,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:19:18,715 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:18,716 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 7 times [2020-09-21 10:19:18,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:18,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827431145] [2020-09-21 10:19:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:18,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:19:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 10:19:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:19:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:19:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:19:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:19:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 204 proven. 219 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-09-21 10:19:19,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827431145] [2020-09-21 10:19:19,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:19,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:19:19,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945435181] [2020-09-21 10:19:19,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:19:19,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:19:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:19:19,244 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 11 states. [2020-09-21 10:19:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:19,538 INFO L93 Difference]: Finished difference Result 135 states and 192 transitions. [2020-09-21 10:19:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:19:19,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-09-21 10:19:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:19,539 INFO L225 Difference]: With dead ends: 135 [2020-09-21 10:19:19,539 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:19:19,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:19:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:19:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:19:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:19:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:19:19,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-09-21 10:19:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:19,543 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:19:19,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:19:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:19:19,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:19:19,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:19:19,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:19:19,990 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-09-21 10:19:20,040 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:19:20,040 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:19:20,041 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:19:20,041 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:19:20,041 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:19:20,041 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:19:20,041 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-09-21 10:19:20,042 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-09-21 10:19:20,042 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-21 10:19:20,042 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-09-21 10:19:20,042 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-09-21 10:19:20,042 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-09-21 10:19:20,043 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-09-21 10:19:20,043 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-09-21 10:19:20,043 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-09-21 10:19:20,043 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-09-21 10:19:20,043 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-09-21 10:19:20,043 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-09-21 10:19:20,044 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-09-21 10:19:20,044 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse1 (<= 1 |fibo_#t~ret0|)) (.cse2 (<= |fibo_#t~ret0| 1)) (.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 3 |fibo_#t~ret0|) (<= 5 fibo_~n) (<= |fibo_#t~ret0| 3) .cse0) (and .cse0 (<= 6 |fibo_#in~n|)) (and .cse1 (<= 2 |fibo_#in~n|) .cse2 (<= |fibo_#in~n| 2) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)) (and .cse1 .cse2 .cse0 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)))) [2020-09-21 10:19:20,044 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-09-21 10:19:20,044 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-09-21 10:19:20,044 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-09-21 10:19:20,045 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-09-21 10:19:20,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:19:20 BoogieIcfgContainer [2020-09-21 10:19:20,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:19:20,057 INFO L168 Benchmark]: Toolchain (without parser) took 7137.18 ms. Allocated memory was 140.0 MB in the beginning and 315.1 MB in the end (delta: 175.1 MB). Free memory was 101.7 MB in the beginning and 253.4 MB in the end (delta: -151.7 MB). Peak memory consumption was 149.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:20,058 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:19:20,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.71 ms. Allocated memory is still 140.0 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:20,060 INFO L168 Benchmark]: Boogie Preprocessor took 28.86 ms. Allocated memory is still 140.0 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:20,061 INFO L168 Benchmark]: RCFGBuilder took 354.76 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 90.4 MB in the beginning and 169.8 MB in the end (delta: -79.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:20,062 INFO L168 Benchmark]: TraceAbstraction took 6437.89 ms. Allocated memory was 202.4 MB in the beginning and 315.1 MB in the end (delta: 112.7 MB). Free memory was 169.8 MB in the beginning and 253.4 MB in the end (delta: -83.6 MB). Peak memory consumption was 154.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:20,065 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.71 ms. Allocated memory is still 140.0 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.86 ms. Allocated memory is still 140.0 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.76 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 90.4 MB in the beginning and 169.8 MB in the end (delta: -79.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6437.89 ms. Allocated memory was 202.4 MB in the beginning and 315.1 MB in the end (delta: 112.7 MB). Free memory was 169.8 MB in the beginning and 253.4 MB in the end (delta: -83.6 MB). Peak memory consumption was 154.9 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 262 SDslu, 932 SDs, 0 SdLazy, 1006 SolverSat, 219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred 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, 10 MinimizatonAttempts, 25 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 137 PreInvPairs, 171 NumberOfFragments, 89 HoareAnnotationTreeSize, 137 FomulaSimplifications, 126 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 703 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 624 NumberOfCodeBlocks, 624 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 134010 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 1993/2854 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...