/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=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:52:38,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:52:38,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:52:38,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:52:38,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:52:38,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:52:38,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:52:38,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:52:38,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:52:38,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:52:38,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:52:38,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:52:38,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:52:38,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:52:38,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:52:38,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:52:38,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:52:38,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:52:38,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:52:38,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:52:38,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:52:38,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:52:38,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:52:38,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:52:38,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:52:38,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:52:38,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:52:38,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:52:38,501 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 [2020-08-18 21:52:38,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:52:38,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:52:38,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:52:38,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:52:38,559 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:52:38,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:52:38,559 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:52:38,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:52:38,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:52:38,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:52:38,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:52:38,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:52:38,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:52:38,560 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:52:38,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:52:38,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:52:38,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:52:38,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:52:38,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:52:38,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:52:38,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:52:38,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:52:38,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:52:38,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:52:38,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:52:38,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:52:38,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:52:38,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:52:38,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:52:38,565 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=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:52:38,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:52:38,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:52:38,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:52:38,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:52:38,905 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:52:38,906 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-18 21:52:38,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96e78f403/75d3b2aa9eb44e2599402adcb99140a4/FLAG996f40a6b [2020-08-18 21:52:39,435 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:52:39,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-18 21:52:39,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96e78f403/75d3b2aa9eb44e2599402adcb99140a4/FLAG996f40a6b [2020-08-18 21:52:39,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96e78f403/75d3b2aa9eb44e2599402adcb99140a4 [2020-08-18 21:52:39,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:52:39,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:52:39,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:52:39,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:52:39,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:52:39,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:52:39" (1/1) ... [2020-08-18 21:52:39,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee0cdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:39, skipping insertion in model container [2020-08-18 21:52:39,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:52:39" (1/1) ... [2020-08-18 21:52:39,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:52:39,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:52:40,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:52:40,061 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:52:40,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:52:40,098 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:52:40,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40 WrapperNode [2020-08-18 21:52:40,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:52:40,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:52:40,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:52:40,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:52:40,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (1/1) ... [2020-08-18 21:52:40,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (1/1) ... [2020-08-18 21:52:40,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (1/1) ... [2020-08-18 21:52:40,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (1/1) ... [2020-08-18 21:52:40,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (1/1) ... [2020-08-18 21:52:40,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (1/1) ... [2020-08-18 21:52:40,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (1/1) ... [2020-08-18 21:52:40,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:52:40,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:52:40,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:52:40,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:52:40,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (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 [2020-08-18 21:52:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:52:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:52:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-08-18 21:52:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:52:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:52:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:52:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-08-18 21:52:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:52:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:52:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:52:40,511 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:52:40,511 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 21:52:40,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:52:40 BoogieIcfgContainer [2020-08-18 21:52:40,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:52:40,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:52:40,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:52:40,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:52:40,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:52:39" (1/3) ... [2020-08-18 21:52:40,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a189a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:52:40, skipping insertion in model container [2020-08-18 21:52:40,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:40" (2/3) ... [2020-08-18 21:52:40,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a189a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:52:40, skipping insertion in model container [2020-08-18 21:52:40,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:52:40" (3/3) ... [2020-08-18 21:52:40,524 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-08-18 21:52:40,535 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:52:40,543 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:52:40,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:52:40,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:52:40,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:52:40,600 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:52:40,600 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:52:40,600 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:52:40,600 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:52:40,601 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:52:40,601 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:52:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 21:52:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 21:52:40,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:40,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:52:40,639 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-08-18 21:52:40,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:40,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413952881] [2020-08-18 21:52:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:40,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:40,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:52:40,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413952881] [2020-08-18 21:52:40,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:52:40,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:52:40,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278933908] [2020-08-18 21:52:40,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:52:40,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:40,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:52:40,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:52:40,951 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-08-18 21:52:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:41,111 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-08-18 21:52:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:52:41,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 21:52:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:41,124 INFO L225 Difference]: With dead ends: 36 [2020-08-18 21:52:41,124 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 21:52:41,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:52:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 21:52:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-18 21:52:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 21:52:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-18 21:52:41,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-18 21:52:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:41,176 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-18 21:52:41,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:52:41,177 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-18 21:52:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:52:41,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:41,179 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] [2020-08-18 21:52:41,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:52:41,180 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-08-18 21:52:41,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:41,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531077191] [2020-08-18 21:52:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:52:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 21:52:41,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531077191] [2020-08-18 21:52:41,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:41,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:52:41,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888094327] [2020-08-18 21:52:41,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:52:41,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:52:41,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:52:41,325 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-08-18 21:52:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:41,418 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-08-18 21:52:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:52:41,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 21:52:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:41,420 INFO L225 Difference]: With dead ends: 39 [2020-08-18 21:52:41,420 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 21:52:41,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:52:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 21:52:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 21:52:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 21:52:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-18 21:52:41,430 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-08-18 21:52:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:41,431 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-18 21:52:41,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:52:41,431 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-18 21:52:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:52:41,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:41,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:52:41,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:52:41,434 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:41,434 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-08-18 21:52:41,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:41,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486084042] [2020-08-18 21:52:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 21:52:41,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486084042] [2020-08-18 21:52:41,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:41,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:52:41,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345888000] [2020-08-18 21:52:41,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:52:41,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:52:41,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:52:41,681 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-08-18 21:52:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:41,900 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-08-18 21:52:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:52:41,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-18 21:52:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:41,905 INFO L225 Difference]: With dead ends: 34 [2020-08-18 21:52:41,906 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 21:52:41,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:52:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 21:52:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 21:52:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 21:52:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-08-18 21:52:41,925 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-08-18 21:52:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:41,925 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-08-18 21:52:41,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:52:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-08-18 21:52:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 21:52:41,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:41,931 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, 1] [2020-08-18 21:52:41,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:52:41,932 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1293014720, now seen corresponding path program 2 times [2020-08-18 21:52:41,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:41,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908804299] [2020-08-18 21:52:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 21:52:42,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908804299] [2020-08-18 21:52:42,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:42,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:52:42,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259164079] [2020-08-18 21:52:42,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:52:42,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:42,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:52:42,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:52:42,110 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 6 states. [2020-08-18 21:52:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:42,226 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-18 21:52:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:52:42,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-08-18 21:52:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:42,228 INFO L225 Difference]: With dead ends: 54 [2020-08-18 21:52:42,228 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 21:52:42,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:52:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 21:52:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 21:52:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 21:52:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-08-18 21:52:42,238 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 42 [2020-08-18 21:52:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:42,238 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-08-18 21:52:42,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:52:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-08-18 21:52:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 21:52:42,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:42,241 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, 1] [2020-08-18 21:52:42,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:52:42,241 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:42,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-08-18 21:52:42,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:42,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64101636] [2020-08-18 21:52:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:52:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 21:52:42,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64101636] [2020-08-18 21:52:42,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:42,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:52:42,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283831736] [2020-08-18 21:52:42,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:52:42,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:52:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:52:42,394 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-08-18 21:52:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:42,509 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-08-18 21:52:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:52:42,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-18 21:52:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:42,513 INFO L225 Difference]: With dead ends: 55 [2020-08-18 21:52:42,513 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 21:52:42,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:52:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 21:52:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 21:52:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 21:52:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-08-18 21:52:42,530 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 41 [2020-08-18 21:52:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:42,531 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-08-18 21:52:42,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:52:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-08-18 21:52:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 21:52:42,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:42,533 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, 1] [2020-08-18 21:52:42,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:52:42,534 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:42,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-08-18 21:52:42,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:42,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622889247] [2020-08-18 21:52:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:52:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-18 21:52:42,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622889247] [2020-08-18 21:52:42,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:42,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:52:42,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187412295] [2020-08-18 21:52:42,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:52:42,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:52:42,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:52:42,808 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2020-08-18 21:52:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:43,049 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-08-18 21:52:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:52:43,050 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-08-18 21:52:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:43,051 INFO L225 Difference]: With dead ends: 41 [2020-08-18 21:52:43,052 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 21:52:43,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:52:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 21:52:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-08-18 21:52:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 21:52:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-08-18 21:52:43,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 42 [2020-08-18 21:52:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:43,062 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-08-18 21:52:43,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:52:43,062 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-08-18 21:52:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 21:52:43,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:43,064 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:52:43,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:52:43,064 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2020-08-18 21:52:43,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:43,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826588084] [2020-08-18 21:52:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:52:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-18 21:52:43,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826588084] [2020-08-18 21:52:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:43,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:52:43,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597157528] [2020-08-18 21:52:43,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:52:43,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:43,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:52:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:52:43,189 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 8 states. [2020-08-18 21:52:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:43,393 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2020-08-18 21:52:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:52:43,393 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-08-18 21:52:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:43,395 INFO L225 Difference]: With dead ends: 70 [2020-08-18 21:52:43,395 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 21:52:43,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:52:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 21:52:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-18 21:52:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 21:52:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-08-18 21:52:43,417 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 55 [2020-08-18 21:52:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:43,417 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-08-18 21:52:43,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:52:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-08-18 21:52:43,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 21:52:43,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:43,423 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:52:43,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:52:43,426 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:43,427 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2020-08-18 21:52:43,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:43,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251758138] [2020-08-18 21:52:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:52:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:52:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:52:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:52:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 151 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-08-18 21:52:43,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251758138] [2020-08-18 21:52:43,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:43,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:52:43,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638592594] [2020-08-18 21:52:43,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:52:43,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:52:43,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:52:43,728 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 10 states. [2020-08-18 21:52:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:43,997 INFO L93 Difference]: Finished difference Result 92 states and 135 transitions. [2020-08-18 21:52:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:52:43,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-08-18 21:52:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:44,002 INFO L225 Difference]: With dead ends: 92 [2020-08-18 21:52:44,002 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 21:52:44,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:52:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 21:52:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-08-18 21:52:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 21:52:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-08-18 21:52:44,022 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 97 [2020-08-18 21:52:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:44,022 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-08-18 21:52:44,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:52:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-08-18 21:52:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 21:52:44,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:44,027 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:52:44,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:52:44,027 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 7 times [2020-08-18 21:52:44,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:44,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997244575] [2020-08-18 21:52:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:52:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:52:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:52:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:52:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:52:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 8 proven. 98 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-18 21:52:44,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997244575] [2020-08-18 21:52:44,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:52:44,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:52:44,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585680928] [2020-08-18 21:52:44,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:52:44,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:52:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:52:44,264 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 14 states. [2020-08-18 21:52:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:44,471 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-08-18 21:52:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:52:44,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-08-18 21:52:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:44,473 INFO L225 Difference]: With dead ends: 52 [2020-08-18 21:52:44,473 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:52:44,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:52:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:52:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:52:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:52:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:52:44,475 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-08-18 21:52:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:44,475 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:52:44,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:52:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:52:44,475 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:52:44,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:52:44,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:52:44,711 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 16 [2020-08-18 21:52:44,716 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-08-18 21:52:44,716 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-08-18 21:52:44,716 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-08-18 21:52:44,717 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-08-18 21:52:44,717 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 2) (<= 1 |fibonacci_#t~ret0|) .cse0 (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 |fibonacci_#in~n|)))) [2020-08-18 21:52:44,717 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-08-18 21:52:44,717 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-08-18 21:52:44,717 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-08-18 21:52:44,717 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-08-18 21:52:44,717 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:52:44,718 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:52:44,718 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:52:44,718 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:52:44,718 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:52:44,718 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:52:44,718 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-08-18 21:52:44,718 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-08-18 21:52:44,718 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-08-18 21:52:44,718 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-08-18 21:52:44,718 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-18 21:52:44,718 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-08-18 21:52:44,719 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-08-18 21:52:44,719 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-08-18 21:52:44,719 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-08-18 21:52:44,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:52:44 BoogieIcfgContainer [2020-08-18 21:52:44,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:52:44,726 INFO L168 Benchmark]: Toolchain (without parser) took 4883.58 ms. Allocated memory was 140.0 MB in the beginning and 275.8 MB in the end (delta: 135.8 MB). Free memory was 103.3 MB in the beginning and 198.7 MB in the end (delta: -95.5 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:44,726 INFO L168 Benchmark]: CDTParser took 0.20 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 21:52:44,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.28 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:44,728 INFO L168 Benchmark]: Boogie Preprocessor took 152.72 ms. Allocated memory was 140.0 MB in the beginning and 206.0 MB in the end (delta: 66.1 MB). Free memory was 93.7 MB in the beginning and 185.2 MB in the end (delta: -91.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:44,729 INFO L168 Benchmark]: RCFGBuilder took 262.15 ms. Allocated memory is still 206.0 MB. Free memory was 184.8 MB in the beginning and 172.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:44,730 INFO L168 Benchmark]: TraceAbstraction took 4207.41 ms. Allocated memory was 206.0 MB in the beginning and 275.8 MB in the end (delta: 69.7 MB). Free memory was 171.7 MB in the beginning and 198.7 MB in the end (delta: -27.1 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:44,734 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.28 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.72 ms. Allocated memory was 140.0 MB in the beginning and 206.0 MB in the end (delta: 66.1 MB). Free memory was 93.7 MB in the beginning and 185.2 MB in the end (delta: -91.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 262.15 ms. Allocated memory is still 206.0 MB. Free memory was 184.8 MB in the beginning and 172.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4207.41 ms. Allocated memory was 206.0 MB in the beginning and 275.8 MB in the end (delta: 69.7 MB). Free memory was 171.7 MB in the beginning and 198.7 MB in the end (delta: -27.1 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 9, TraceHistogramMax: 13, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 158 SDtfs, 139 SDslu, 543 SDs, 0 SdLazy, 730 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred 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, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 80 PreInvPairs, 99 NumberOfFragments, 39 HoareAnnotationTreeSize, 80 FomulaSimplifications, 291 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 215 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 415 NumberOfCodeBlocks, 415 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 406 ConstructedInterpolants, 0 QuantifiedInterpolants, 50421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 550/894 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...