/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -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 02:45:25,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:45:25,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:45:25,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:45:25,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:45:25,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:45:25,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:45:25,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:45:25,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:45:25,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:45:25,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:45:25,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:45:25,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:45:25,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:45:25,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:45:25,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:45:25,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:45:25,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:45:25,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:45:25,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:45:25,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:45:25,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:45:25,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:45:25,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:45:25,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:45:25,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:45:25,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:45:25,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:45:25,416 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 02:45:25,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:45:25,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:45:25,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:45:25,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:45:25,467 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:45:25,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:45:25,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:45:25,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:45:25,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:45:25,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:45:25,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:45:25,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:45:25,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:45:25,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:45:25,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:45:25,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:45:25,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:45:25,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:45:25,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:45:25,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:45:25,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:45:25,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:45:25,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:45:25,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:45:25,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:45:25,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:45:25,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:45:25,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:45:25,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:45:25,473 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=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:45:25,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:45:25,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:45:25,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:45:25,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:45:25,866 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:45:25,867 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-08-19 02:45:25,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/380598c91/fca7df2bb1cb4bd3ae618b76ff950306/FLAG7216a7edc [2020-08-19 02:45:26,449 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:45:26,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-08-19 02:45:26,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/380598c91/fca7df2bb1cb4bd3ae618b76ff950306/FLAG7216a7edc [2020-08-19 02:45:26,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/380598c91/fca7df2bb1cb4bd3ae618b76ff950306 [2020-08-19 02:45:26,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:45:26,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:45:26,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:45:26,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:45:26,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:45:26,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:45:26" (1/1) ... [2020-08-19 02:45:26,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488fa6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:26, skipping insertion in model container [2020-08-19 02:45:26,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:45:26" (1/1) ... [2020-08-19 02:45:26,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:45:26,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:45:27,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:45:27,146 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:45:27,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:45:27,187 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:45:27,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27 WrapperNode [2020-08-19 02:45:27,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:45:27,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:45:27,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:45:27,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:45:27,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (1/1) ... [2020-08-19 02:45:27,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (1/1) ... [2020-08-19 02:45:27,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (1/1) ... [2020-08-19 02:45:27,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (1/1) ... [2020-08-19 02:45:27,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (1/1) ... [2020-08-19 02:45:27,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (1/1) ... [2020-08-19 02:45:27,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (1/1) ... [2020-08-19 02:45:27,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:45:27,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:45:27,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:45:27,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:45:27,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (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 02:45:27,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:45:27,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:45:27,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-19 02:45:27,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:45:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:45:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:45:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-19 02:45:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:45:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:45:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:45:27,634 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:45:27,635 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:45:27,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:45:27 BoogieIcfgContainer [2020-08-19 02:45:27,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:45:27,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:45:27,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:45:27,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:45:27,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:45:26" (1/3) ... [2020-08-19 02:45:27,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc3883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:45:27, skipping insertion in model container [2020-08-19 02:45:27,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:27" (2/3) ... [2020-08-19 02:45:27,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc3883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:45:27, skipping insertion in model container [2020-08-19 02:45:27,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:45:27" (3/3) ... [2020-08-19 02:45:27,650 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-08-19 02:45:27,663 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:45:27,671 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:45:27,689 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:45:27,719 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:45:27,720 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:45:27,720 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:45:27,720 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:45:27,721 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:45:27,721 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:45:27,722 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:45:27,722 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:45:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-19 02:45:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:45:27,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:27,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:27,753 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-19 02:45:27,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:27,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401959235] [2020-08-19 02:45:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:27,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:27,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,010 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 02:45:28,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401959235] [2020-08-19 02:45:28,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:45:28,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:45:28,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571429804] [2020-08-19 02:45:28,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:45:28,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:45:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:45:28,054 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-19 02:45:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:28,179 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-19 02:45:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:45:28,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 02:45:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:28,196 INFO L225 Difference]: With dead ends: 35 [2020-08-19 02:45:28,196 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 02:45:28,201 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 02:45:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 02:45:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 02:45:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 02:45:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-19 02:45:28,258 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-19 02:45:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:28,259 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-19 02:45:28,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:45:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-19 02:45:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 02:45:28,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:28,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:28,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:45:28,263 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:28,264 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-19 02:45:28,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:28,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319460534] [2020-08-19 02:45:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,337 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 02:45:28,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319460534] [2020-08-19 02:45:28,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:45:28,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:45:28,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252765045] [2020-08-19 02:45:28,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:45:28,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:28,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:45:28,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:45:28,343 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-19 02:45:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:28,409 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-19 02:45:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:45:28,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 02:45:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:28,412 INFO L225 Difference]: With dead ends: 27 [2020-08-19 02:45:28,412 INFO L226 Difference]: Without dead ends: 23 [2020-08-19 02:45:28,413 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 02:45:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-19 02:45:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-19 02:45:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 02:45:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-19 02:45:28,422 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-19 02:45:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:28,423 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-19 02:45:28,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:45:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-19 02:45:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:45:28,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:28,425 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 02:45:28,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:45:28,426 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-19 02:45:28,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:28,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988050797] [2020-08-19 02:45:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:45:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 02:45:28,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988050797] [2020-08-19 02:45:28,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:28,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:45:28,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588866683] [2020-08-19 02:45:28,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:45:28,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:45:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:45:28,590 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-19 02:45:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:28,715 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-19 02:45:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:45:28,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 02:45:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:28,718 INFO L225 Difference]: With dead ends: 38 [2020-08-19 02:45:28,718 INFO L226 Difference]: Without dead ends: 23 [2020-08-19 02:45:28,719 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 02:45:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-19 02:45:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-19 02:45:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 02:45:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-19 02:45:28,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-19 02:45:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:28,729 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-19 02:45:28,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:45:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-19 02:45:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 02:45:28,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:28,732 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 02:45:28,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:45:28,732 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:28,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-19 02:45:28,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:28,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751819801] [2020-08-19 02:45:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:28,841 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 02:45:28,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751819801] [2020-08-19 02:45:28,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:28,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:45:28,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448838867] [2020-08-19 02:45:28,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:45:28,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:28,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:45:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:45:28,845 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-19 02:45:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:28,972 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-19 02:45:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:45:28,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-19 02:45:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:28,975 INFO L225 Difference]: With dead ends: 41 [2020-08-19 02:45:28,976 INFO L226 Difference]: Without dead ends: 37 [2020-08-19 02:45:28,976 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 02:45:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-19 02:45:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-19 02:45:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 02:45:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-19 02:45:28,989 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-19 02:45:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:28,990 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-19 02:45:28,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:45:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-19 02:45:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 02:45:28,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:28,992 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 02:45:28,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:45:28,993 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:28,994 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-19 02:45:28,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:28,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728965603] [2020-08-19 02:45:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,202 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 02:45:29,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728965603] [2020-08-19 02:45:29,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:29,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:45:29,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365680563] [2020-08-19 02:45:29,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:45:29,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:45:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:45:29,207 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-19 02:45:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:29,409 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-19 02:45:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:45:29,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 02:45:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:29,417 INFO L225 Difference]: With dead ends: 79 [2020-08-19 02:45:29,419 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 02:45:29,421 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 02:45:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 02:45:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-19 02:45:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 02:45:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-19 02:45:29,452 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-19 02:45:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:29,452 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-19 02:45:29,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:45:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-19 02:45:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 02:45:29,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:29,461 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 02:45:29,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:45:29,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-19 02:45:29,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:29,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856458570] [2020-08-19 02:45:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,645 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 02:45:29,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856458570] [2020-08-19 02:45:29,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:29,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:45:29,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226007476] [2020-08-19 02:45:29,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:45:29,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:45:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:45:29,648 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-19 02:45:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:29,772 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-19 02:45:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:45:29,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-19 02:45:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:29,775 INFO L225 Difference]: With dead ends: 65 [2020-08-19 02:45:29,775 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 02:45:29,776 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 02:45:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 02:45:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-19 02:45:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 02:45:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-19 02:45:29,790 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-19 02:45:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:29,790 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-19 02:45:29,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:45:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-19 02:45:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 02:45:29,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:29,794 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 02:45:29,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:45:29,794 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-19 02:45:29,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:29,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889558863] [2020-08-19 02:45:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,123 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 02:45:30,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889558863] [2020-08-19 02:45:30,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:30,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:45:30,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001835519] [2020-08-19 02:45:30,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:45:30,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:45:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:45:30,142 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-19 02:45:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:30,503 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-19 02:45:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:45:30,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-19 02:45:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:30,507 INFO L225 Difference]: With dead ends: 107 [2020-08-19 02:45:30,507 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 02:45:30,509 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 02:45:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 02:45:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 02:45:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 02:45:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-19 02:45:30,520 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-19 02:45:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:30,521 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-19 02:45:30,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:45:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-19 02:45:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-19 02:45:30,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:30,524 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 02:45:30,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:45:30,524 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-19 02:45:30,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:30,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181897350] [2020-08-19 02:45:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 02:45:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:30,990 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 02:45:30,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181897350] [2020-08-19 02:45:30,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:30,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:45:30,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285754482] [2020-08-19 02:45:30,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:45:30,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:30,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:45:30,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:45:30,994 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-19 02:45:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:31,411 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2020-08-19 02:45:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 02:45:31,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-19 02:45:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:31,414 INFO L225 Difference]: With dead ends: 114 [2020-08-19 02:45:31,414 INFO L226 Difference]: Without dead ends: 73 [2020-08-19 02:45:31,415 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 02:45:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-19 02:45:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-08-19 02:45:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 02:45:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-08-19 02:45:31,426 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 136 [2020-08-19 02:45:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:31,427 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-08-19 02:45:31,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:45:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-08-19 02:45:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 02:45:31,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:31,429 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 02:45:31,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:45:31,429 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-08-19 02:45:31,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:31,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015951877] [2020-08-19 02:45:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 02:45:31,449 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 02:45:31,452 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 02:45:31,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:45:31,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:45:31 BoogieIcfgContainer [2020-08-19 02:45:31,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:45:31,501 INFO L168 Benchmark]: Toolchain (without parser) took 4649.74 ms. Allocated memory was 138.9 MB in the beginning and 249.0 MB in the end (delta: 110.1 MB). Free memory was 102.1 MB in the beginning and 113.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 98.6 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:31,503 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-19 02:45:31,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.50 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:31,505 INFO L168 Benchmark]: Boogie Preprocessor took 39.34 ms. Allocated memory is still 138.9 MB. Free memory was 92.7 MB in the beginning and 91.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:31,506 INFO L168 Benchmark]: RCFGBuilder took 409.09 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.0 MB in the beginning and 169.7 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:31,510 INFO L168 Benchmark]: TraceAbstraction took 3851.85 ms. Allocated memory was 202.4 MB in the beginning and 249.0 MB in the end (delta: 46.7 MB). Free memory was 168.7 MB in the beginning and 113.6 MB in the end (delta: 55.1 MB). Peak memory consumption was 101.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:31,522 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.50 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.34 ms. Allocated memory is still 138.9 MB. Free memory was 92.7 MB in the beginning and 91.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.09 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.0 MB in the beginning and 169.7 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3851.85 ms. Allocated memory was 202.4 MB in the beginning and 249.0 MB in the end (delta: 46.7 MB). Free memory was 168.7 MB in the beginning and 113.6 MB in the end (delta: 55.1 MB). Peak memory consumption was 101.7 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: 3.7s, OverallIterations: 9, TraceHistogramMax: 19, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 240 SDslu, 428 SDs, 0 SdLazy, 609 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, 1.4s 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...