/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:22:25,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:22:25,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:22:25,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:22:25,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:22:25,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:22:25,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:22:25,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:22:25,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:22:25,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:22:25,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:22:25,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:22:25,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:22:25,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:22:25,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:22:25,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:22:25,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:22:25,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:22:25,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:22:25,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:22:25,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:22:25,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:22:25,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:22:25,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:22:25,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:22:25,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:22:25,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:22:25,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:22:25,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 04:22:25,391 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:22:25,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:22:25,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:22:25,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:22:25,393 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:22:25,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:22:25,393 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:22:25,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:22:25,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:22:25,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:22:25,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:22:25,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:22:25,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:22:25,395 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:22:25,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:22:25,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:22:25,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:22:25,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:22:25,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:22:25,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:22:25,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:22:25,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:22:25,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:22:25,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:22:25,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:22:25,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:22:25,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:22:25,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:22:25,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:22:25,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:22:25,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:22:25,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:22:25,776 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:22:25,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:22:25,778 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:22:25,779 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-08-19 04:22:25,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4732e8cda/dbf117350fc0495c96cc6c36987489f3/FLAG4fd558a5a [2020-08-19 04:22:26,341 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:22:26,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-08-19 04:22:26,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4732e8cda/dbf117350fc0495c96cc6c36987489f3/FLAG4fd558a5a [2020-08-19 04:22:26,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4732e8cda/dbf117350fc0495c96cc6c36987489f3 [2020-08-19 04:22:26,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:22:26,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:22:26,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:26,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:22:26,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:22:26,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:26" (1/1) ... [2020-08-19 04:22:26,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e07dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:26, skipping insertion in model container [2020-08-19 04:22:26,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:26" (1/1) ... [2020-08-19 04:22:26,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:22:26,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:22:27,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:27,010 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:22:27,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:27,039 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:22:27,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27 WrapperNode [2020-08-19 04:22:27,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:27,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:22:27,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:22:27,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:22:27,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... [2020-08-19 04:22:27,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... [2020-08-19 04:22:27,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... [2020-08-19 04:22:27,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... [2020-08-19 04:22:27,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... [2020-08-19 04:22:27,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... [2020-08-19 04:22:27,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... [2020-08-19 04:22:27,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:22:27,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:22:27,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:22:27,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:22:27,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:22:27,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:22:27,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:22:27,210 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-19 04:22:27,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:22:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:22:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:22:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-19 04:22:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:22:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:22:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:22:27,413 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:22:27,414 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 04:22:27,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:27 BoogieIcfgContainer [2020-08-19 04:22:27,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:22:27,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:22:27,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:22:27,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:22:27,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:22:26" (1/3) ... [2020-08-19 04:22:27,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4210093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:27, skipping insertion in model container [2020-08-19 04:22:27,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:27" (2/3) ... [2020-08-19 04:22:27,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4210093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:27, skipping insertion in model container [2020-08-19 04:22:27,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:27" (3/3) ... [2020-08-19 04:22:27,454 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-08-19 04:22:27,480 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:22:27,494 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:22:27,530 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:22:27,557 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:22:27,558 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:22:27,558 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:22:27,558 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:22:27,558 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:22:27,558 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:22:27,559 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:22:27,559 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:22:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-19 04:22:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 04:22:27,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:27,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:27,581 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-19 04:22:27,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:27,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695342977] [2020-08-19 04:22:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:27,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:27,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:22:27,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695342977] [2020-08-19 04:22:27,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:22:27,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:22:27,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534761634] [2020-08-19 04:22:27,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:22:27,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:22:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:22:27,826 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-19 04:22:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:27,936 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-19 04:22:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:22:27,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 04:22:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:27,948 INFO L225 Difference]: With dead ends: 35 [2020-08-19 04:22:27,949 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 04:22:27,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:22:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 04:22:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 04:22:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 04:22:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-19 04:22:28,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-19 04:22:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:28,002 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-19 04:22:28,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:22:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-19 04:22:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 04:22:28,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:28,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:28,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:22:28,006 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-19 04:22:28,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:28,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578365172] [2020-08-19 04:22:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:22:28,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578365172] [2020-08-19 04:22:28,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:22:28,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:22:28,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255152997] [2020-08-19 04:22:28,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:22:28,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:28,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:22:28,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:22:28,104 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-19 04:22:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:28,169 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-19 04:22:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:22:28,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 04:22:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:28,172 INFO L225 Difference]: With dead ends: 27 [2020-08-19 04:22:28,172 INFO L226 Difference]: Without dead ends: 23 [2020-08-19 04:22:28,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:22:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-19 04:22:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-19 04:22:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 04:22:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-19 04:22:28,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-19 04:22:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:28,183 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-19 04:22:28,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:22:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-19 04:22:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 04:22:28,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:28,185 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] [2020-08-19 04:22:28,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:22:28,186 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:28,186 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-19 04:22:28,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:28,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225197668] [2020-08-19 04:22:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 04:22:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 04:22:28,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225197668] [2020-08-19 04:22:28,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:28,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:22:28,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946217798] [2020-08-19 04:22:28,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:22:28,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:28,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:22:28,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:22:28,324 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-19 04:22:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:28,428 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-19 04:22:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:22:28,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 04:22:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:28,430 INFO L225 Difference]: With dead ends: 38 [2020-08-19 04:22:28,431 INFO L226 Difference]: Without dead ends: 23 [2020-08-19 04:22:28,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:22:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-19 04:22:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-19 04:22:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 04:22:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-19 04:22:28,441 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-19 04:22:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:28,441 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-19 04:22:28,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:22:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-19 04:22:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 04:22:28,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:28,444 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] [2020-08-19 04:22:28,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:22:28,444 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-19 04:22:28,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:28,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860977990] [2020-08-19 04:22:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:22:28,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860977990] [2020-08-19 04:22:28,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:28,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:22:28,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965344981] [2020-08-19 04:22:28,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:22:28,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:22:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:22:28,551 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-19 04:22:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:28,687 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-19 04:22:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:22:28,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-19 04:22:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:28,690 INFO L225 Difference]: With dead ends: 41 [2020-08-19 04:22:28,690 INFO L226 Difference]: Without dead ends: 37 [2020-08-19 04:22:28,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:22:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-19 04:22:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-19 04:22:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 04:22:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-19 04:22:28,703 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-19 04:22:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:28,704 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-19 04:22:28,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:22:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-19 04:22:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 04:22:28,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:28,706 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] [2020-08-19 04:22:28,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:22:28,707 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:28,707 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-19 04:22:28,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:28,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199984746] [2020-08-19 04:22:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:22:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-19 04:22:28,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199984746] [2020-08-19 04:22:28,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:28,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:22:28,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287941576] [2020-08-19 04:22:28,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:22:28,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:22:28,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:22:28,925 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-19 04:22:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:29,072 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-19 04:22:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:22:29,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 04:22:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:29,075 INFO L225 Difference]: With dead ends: 79 [2020-08-19 04:22:29,075 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 04:22:29,077 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 [2020-08-19 04:22:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 04:22:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-19 04:22:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 04:22:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-19 04:22:29,090 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-19 04:22:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:29,090 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-19 04:22:29,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:22:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-19 04:22:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 04:22:29,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:29,093 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] [2020-08-19 04:22:29,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:22:29,093 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:29,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-19 04:22:29,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:29,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580124232] [2020-08-19 04:22:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:22:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 04:22:29,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580124232] [2020-08-19 04:22:29,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:29,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:22:29,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827295970] [2020-08-19 04:22:29,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:22:29,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:22:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:22:29,207 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-19 04:22:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:29,325 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-19 04:22:29,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:22:29,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-19 04:22:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:29,328 INFO L225 Difference]: With dead ends: 65 [2020-08-19 04:22:29,328 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 04:22:29,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:22:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 04:22:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-19 04:22:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 04:22:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-19 04:22:29,344 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-19 04:22:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:29,345 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-19 04:22:29,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:22:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-19 04:22:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 04:22:29,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:29,349 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] [2020-08-19 04:22:29,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:22:29,350 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:29,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:29,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-19 04:22:29,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:29,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843539791] [2020-08-19 04:22:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:22:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:22:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:22:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 104 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-19 04:22:29,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843539791] [2020-08-19 04:22:29,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:29,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:22:29,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378343893] [2020-08-19 04:22:29,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:22:29,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:29,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:22:29,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:22:29,633 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-19 04:22:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:29,984 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-19 04:22:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 04:22:29,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-19 04:22:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:29,988 INFO L225 Difference]: With dead ends: 107 [2020-08-19 04:22:29,988 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 04:22:29,990 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 [2020-08-19 04:22:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 04:22:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 04:22:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 04:22:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-19 04:22:30,002 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-19 04:22:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:30,003 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-19 04:22:30,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:22:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-19 04:22:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-19 04:22:30,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:30,006 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] [2020-08-19 04:22:30,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:22:30,007 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:30,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-19 04:22:30,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:30,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733927143] [2020-08-19 04:22:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:22:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:22:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 04:22:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:22:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:22:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:22:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:22:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-08-19 04:22:30,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733927143] [2020-08-19 04:22:30,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:30,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:22:30,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610536033] [2020-08-19 04:22:30,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:22:30,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:22:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:22:30,434 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-19 04:22:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:30,878 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2020-08-19 04:22:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:22:30,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-19 04:22:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:30,882 INFO L225 Difference]: With dead ends: 114 [2020-08-19 04:22:30,882 INFO L226 Difference]: Without dead ends: 73 [2020-08-19 04:22:30,883 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 [2020-08-19 04:22:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-19 04:22:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-08-19 04:22:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 04:22:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-08-19 04:22:30,894 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 136 [2020-08-19 04:22:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:30,895 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-08-19 04:22:30,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:22:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-08-19 04:22:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 04:22:30,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:30,897 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] [2020-08-19 04:22:30,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:22:30,898 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:30,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-08-19 04:22:30,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:30,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971477460] [2020-08-19 04:22:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 04:22:30,916 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 04:22:30,917 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 04:22:30,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:22:30,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:22:30 BoogieIcfgContainer [2020-08-19 04:22:30,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:22:30,960 INFO L168 Benchmark]: Toolchain (without parser) took 4180.59 ms. Allocated memory was 140.0 MB in the beginning and 246.4 MB in the end (delta: 106.4 MB). Free memory was 103.4 MB in the beginning and 101.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:30,961 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 04:22:30,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.02 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:30,963 INFO L168 Benchmark]: Boogie Preprocessor took 23.75 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:30,964 INFO L168 Benchmark]: RCFGBuilder took 357.15 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 92.1 MB in the beginning and 169.3 MB in the end (delta: -77.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:30,965 INFO L168 Benchmark]: TraceAbstraction took 3524.54 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 168.7 MB in the beginning and 101.2 MB in the end (delta: 67.4 MB). Peak memory consumption was 112.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:30,968 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.02 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.75 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 357.15 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 92.1 MB in the beginning and 169.3 MB in the end (delta: -77.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3524.54 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 168.7 MB in the beginning and 101.2 MB in the end (delta: 67.4 MB). Peak memory consumption was 112.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; [L25] CALL, EXPR fibo(x) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND TRUE n < 1 [L7] return 0; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND TRUE n < 1 [L7] return 0; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND TRUE n < 1 [L7] return 0; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) [L25] int result = fibo(x); [L26] COND TRUE result == 5 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 9, TraceHistogramMax: 19, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 240 SDslu, 428 SDs, 0 SdLazy, 613 SolverSat, 186 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=8, 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, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 488 NumberOfCodeBlocks, 488 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 371 ConstructedInterpolants, 0 QuantifiedInterpolants, 55683 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 894/1351 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...