/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:47:59,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:47:59,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:47:59,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:47:59,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:47:59,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:47:59,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:47:59,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:47:59,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:47:59,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:47:59,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:47:59,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:47:59,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:47:59,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:47:59,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:47:59,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:47:59,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:47:59,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:47:59,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:47:59,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:47:59,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:47:59,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:47:59,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:47:59,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:47:59,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:47:59,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:47:59,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:47:59,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:47:59,148 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 06:47:59,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:47:59,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:47:59,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:47:59,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:47:59,173 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:47:59,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:47:59,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:47:59,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:47:59,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:47:59,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:47:59,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:47:59,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:47:59,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:47:59,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:47:59,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:47:59,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:47:59,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:47:59,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:47:59,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:47:59,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:47:59,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:47:59,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:47:59,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:47:59,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:47:59,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:47:59,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:47:59,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:47:59,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:47:59,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:47:59,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:47:59,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:47:59,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:47:59,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:47:59,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:47:59,521 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:47:59,522 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-19 06:47:59,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d2588ae5/f6312d1f59f6493eaa5ba2ccbd5ec2d4/FLAGa33542961 [2020-08-19 06:48:00,067 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:48:00,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-19 06:48:00,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d2588ae5/f6312d1f59f6493eaa5ba2ccbd5ec2d4/FLAGa33542961 [2020-08-19 06:48:00,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d2588ae5/f6312d1f59f6493eaa5ba2ccbd5ec2d4 [2020-08-19 06:48:00,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:48:00,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:48:00,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:48:00,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:48:00,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:48:00,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697b2ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00, skipping insertion in model container [2020-08-19 06:48:00,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:48:00,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:48:00,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:48:00,659 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:48:00,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:48:00,691 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:48:00,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00 WrapperNode [2020-08-19 06:48:00,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:48:00,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:48:00,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:48:00,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:48:00,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (1/1) ... [2020-08-19 06:48:00,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:48:00,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:48:00,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:48:00,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:48:00,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (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 06:48:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:48:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:48:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-19 06:48:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:48:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:48:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:48:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-19 06:48:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:48:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:48:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:48:01,044 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:48:01,044 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:48:01,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:48:01 BoogieIcfgContainer [2020-08-19 06:48:01,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:48:01,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:48:01,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:48:01,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:48:01,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:48:00" (1/3) ... [2020-08-19 06:48:01,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6d15e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:48:01, skipping insertion in model container [2020-08-19 06:48:01,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:00" (2/3) ... [2020-08-19 06:48:01,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6d15e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:48:01, skipping insertion in model container [2020-08-19 06:48:01,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:48:01" (3/3) ... [2020-08-19 06:48:01,059 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-08-19 06:48:01,072 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:48:01,094 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:48:01,141 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:48:01,188 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:48:01,188 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:48:01,188 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:48:01,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:48:01,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:48:01,189 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:48:01,189 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:48:01,189 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:48:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-19 06:48:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 06:48:01,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:01,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:01,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:01,226 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-19 06:48:01,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:01,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922814781] [2020-08-19 06:48:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,469 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 06:48:01,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922814781] [2020-08-19 06:48:01,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:48:01,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:48:01,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781893859] [2020-08-19 06:48:01,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:48:01,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:48:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:48:01,496 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-19 06:48:01,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:01,589 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-19 06:48:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:48:01,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 06:48:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:01,602 INFO L225 Difference]: With dead ends: 35 [2020-08-19 06:48:01,602 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 06:48:01,606 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 06:48:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 06:48:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 06:48:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 06:48:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-19 06:48:01,649 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-19 06:48:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:01,650 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-19 06:48:01,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:48:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-19 06:48:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 06:48:01,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:01,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:01,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:48:01,653 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-19 06:48:01,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:01,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593591588] [2020-08-19 06:48:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,734 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 06:48:01,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593591588] [2020-08-19 06:48:01,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:48:01,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:48:01,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173485368] [2020-08-19 06:48:01,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:48:01,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:48:01,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:48:01,740 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-19 06:48:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:01,800 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-19 06:48:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:48:01,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 06:48:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:01,803 INFO L225 Difference]: With dead ends: 27 [2020-08-19 06:48:01,803 INFO L226 Difference]: Without dead ends: 23 [2020-08-19 06:48:01,805 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 06:48:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-19 06:48:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-19 06:48:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 06:48:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-19 06:48:01,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-19 06:48:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:01,814 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-19 06:48:01,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:48:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-19 06:48:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:48:01,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:01,816 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 06:48:01,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:48:01,816 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-19 06:48:01,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:01,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014935917] [2020-08-19 06:48:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:01,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 06:48:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,027 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 06:48:02,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014935917] [2020-08-19 06:48:02,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:02,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:48:02,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883080063] [2020-08-19 06:48:02,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:48:02,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:02,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:48:02,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:48:02,031 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-19 06:48:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:02,154 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-19 06:48:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:48:02,155 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 06:48:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:02,156 INFO L225 Difference]: With dead ends: 38 [2020-08-19 06:48:02,156 INFO L226 Difference]: Without dead ends: 23 [2020-08-19 06:48:02,157 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 06:48:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-19 06:48:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-19 06:48:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 06:48:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-19 06:48:02,171 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-19 06:48:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:02,172 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-19 06:48:02,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:48:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-19 06:48:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:48:02,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:02,179 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] [2020-08-19 06:48:02,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:48:02,180 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-19 06:48:02,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:02,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277797446] [2020-08-19 06:48:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,318 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 06:48:02,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277797446] [2020-08-19 06:48:02,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:02,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:48:02,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483600017] [2020-08-19 06:48:02,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:48:02,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:02,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:48:02,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:48:02,321 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-19 06:48:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:02,440 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-19 06:48:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:48:02,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-19 06:48:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:02,444 INFO L225 Difference]: With dead ends: 41 [2020-08-19 06:48:02,444 INFO L226 Difference]: Without dead ends: 37 [2020-08-19 06:48:02,445 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 06:48:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-19 06:48:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-19 06:48:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 06:48:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-19 06:48:02,457 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-19 06:48:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:02,457 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-19 06:48:02,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:48:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-19 06:48:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 06:48:02,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:02,460 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 06:48:02,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:48:02,461 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:02,461 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-19 06:48:02,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:02,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705380139] [2020-08-19 06:48:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,641 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 06:48:02,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705380139] [2020-08-19 06:48:02,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:02,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:48:02,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293264981] [2020-08-19 06:48:02,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:48:02,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:48:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:48:02,644 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-19 06:48:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:02,771 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-19 06:48:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:48:02,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 06:48:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:02,774 INFO L225 Difference]: With dead ends: 79 [2020-08-19 06:48:02,774 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 06:48:02,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:48:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 06:48:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-19 06:48:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 06:48:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-19 06:48:02,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-19 06:48:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:02,789 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-19 06:48:02,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:48:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-19 06:48:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 06:48:02,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:02,792 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 06:48:02,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:48:02,793 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-19 06:48:02,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:02,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203005549] [2020-08-19 06:48:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:02,955 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 06:48:02,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203005549] [2020-08-19 06:48:02,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:02,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:48:02,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134934526] [2020-08-19 06:48:02,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:48:02,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:48:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:48:02,962 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-19 06:48:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:03,099 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-19 06:48:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:48:03,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-19 06:48:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:03,106 INFO L225 Difference]: With dead ends: 65 [2020-08-19 06:48:03,107 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 06:48:03,108 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 06:48:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 06:48:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-19 06:48:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 06:48:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-19 06:48:03,138 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-19 06:48:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:03,140 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-19 06:48:03,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:48:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-19 06:48:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 06:48:03,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:03,151 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 06:48:03,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:48:03,151 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-19 06:48:03,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:03,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720913966] [2020-08-19 06:48:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:48:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:03,517 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 06:48:03,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720913966] [2020-08-19 06:48:03,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:03,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:48:03,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363230085] [2020-08-19 06:48:03,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:48:03,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:03,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:48:03,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:48:03,520 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-19 06:48:03,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:03,881 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-19 06:48:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:48:03,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-19 06:48:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:03,891 INFO L225 Difference]: With dead ends: 107 [2020-08-19 06:48:03,891 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 06:48:03,897 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 06:48:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 06:48:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 06:48:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 06:48:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-19 06:48:03,921 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-19 06:48:03,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:03,922 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-19 06:48:03,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:48:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-19 06:48:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-19 06:48:03,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:03,925 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 06:48:03,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:48:03,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:03,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-19 06:48:03,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:03,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106406092] [2020-08-19 06:48:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:48:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:48:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:48:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,371 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 06:48:04,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106406092] [2020-08-19 06:48:04,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:04,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:48:04,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493890939] [2020-08-19 06:48:04,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:48:04,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:48:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:48:04,374 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-19 06:48:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:04,819 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2020-08-19 06:48:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 06:48:04,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-19 06:48:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:04,824 INFO L225 Difference]: With dead ends: 114 [2020-08-19 06:48:04,824 INFO L226 Difference]: Without dead ends: 73 [2020-08-19 06:48:04,826 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 06:48:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-19 06:48:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-08-19 06:48:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 06:48:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-08-19 06:48:04,845 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 136 [2020-08-19 06:48:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:04,845 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-08-19 06:48:04,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:48:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-08-19 06:48:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 06:48:04,852 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:04,852 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 06:48:04,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:48:04,852 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-08-19 06:48:04,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:04,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645627712] [2020-08-19 06:48:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:04,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:48:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:48:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-08-19 06:48:05,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645627712] [2020-08-19 06:48:05,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:05,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:48:05,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68457173] [2020-08-19 06:48:05,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:48:05,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:48:05,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:48:05,382 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 16 states. [2020-08-19 06:48:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:05,660 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-08-19 06:48:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:48:05,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-08-19 06:48:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:05,663 INFO L225 Difference]: With dead ends: 76 [2020-08-19 06:48:05,663 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 06:48:05,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:48:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 06:48:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-19 06:48:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 06:48:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-08-19 06:48:05,674 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 109 [2020-08-19 06:48:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:05,675 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-08-19 06:48:05,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:48:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-08-19 06:48:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-19 06:48:05,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:05,677 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 06:48:05,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:48:05,677 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 7 times [2020-08-19 06:48:05,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:05,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601824222] [2020-08-19 06:48:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:48:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:48:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:48:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:48:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:48:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:48:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 204 proven. 219 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-08-19 06:48:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601824222] [2020-08-19 06:48:05,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:05,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:48:05,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666824210] [2020-08-19 06:48:05,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:48:05,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:48:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:48:05,976 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 11 states. [2020-08-19 06:48:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:06,243 INFO L93 Difference]: Finished difference Result 135 states and 192 transitions. [2020-08-19 06:48:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:48:06,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-19 06:48:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:06,245 INFO L225 Difference]: With dead ends: 135 [2020-08-19 06:48:06,245 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:48:06,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:48:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:48:06,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:48:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:48:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:48:06,249 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-19 06:48:06,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:06,250 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:48:06,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:48:06,250 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:48:06,250 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:48:06,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:48:06,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:48:06,671 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-08-19 06:48:06,718 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:48:06,719 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:48:06,719 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:48:06,719 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:48:06,719 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:48:06,719 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:48:06,719 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-08-19 06:48:06,719 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-08-19 06:48:06,719 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-08-19 06:48:06,720 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-08-19 06:48:06,720 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-19 06:48:06,721 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse1 (<= 1 |fibo_#t~ret0|)) (.cse2 (<= |fibo_#t~ret0| 1)) (.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 3 |fibo_#t~ret0|) (<= 5 fibo_~n) (<= |fibo_#t~ret0| 3) .cse0) (and .cse0 (<= 6 |fibo_#in~n|)) (and .cse1 (<= 2 |fibo_#in~n|) .cse2 (<= |fibo_#in~n| 2) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)) (and .cse1 .cse2 .cse0 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)))) [2020-08-19 06:48:06,721 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-08-19 06:48:06,721 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-08-19 06:48:06,721 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-08-19 06:48:06,721 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-08-19 06:48:06,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:48:06 BoogieIcfgContainer [2020-08-19 06:48:06,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:48:06,731 INFO L168 Benchmark]: Toolchain (without parser) took 6279.40 ms. Allocated memory was 141.6 MB in the beginning and 303.6 MB in the end (delta: 162.0 MB). Free memory was 103.5 MB in the beginning and 201.4 MB in the end (delta: -97.9 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:06,732 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:48:06,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.74 ms. Allocated memory is still 141.6 MB. Free memory was 103.3 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:06,737 INFO L168 Benchmark]: Boogie Preprocessor took 30.50 ms. Allocated memory is still 141.6 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:06,741 INFO L168 Benchmark]: RCFGBuilder took 325.89 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 172.6 MB in the end (delta: -79.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:06,742 INFO L168 Benchmark]: TraceAbstraction took 5678.50 ms. Allocated memory was 204.5 MB in the beginning and 303.6 MB in the end (delta: 99.1 MB). Free memory was 171.9 MB in the beginning and 201.4 MB in the end (delta: -29.5 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:06,752 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.74 ms. Allocated memory is still 141.6 MB. Free memory was 103.3 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.50 ms. Allocated memory is still 141.6 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.89 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 172.6 MB in the end (delta: -79.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5678.50 ms. Allocated memory was 204.5 MB in the beginning and 303.6 MB in the end (delta: 99.1 MB). Free memory was 171.9 MB in the beginning and 201.4 MB in the end (delta: -29.5 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 262 SDslu, 932 SDs, 0 SdLazy, 999 SolverSat, 219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 25 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 137 PreInvPairs, 171 NumberOfFragments, 89 HoareAnnotationTreeSize, 137 FomulaSimplifications, 126 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 703 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 624 NumberOfCodeBlocks, 624 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 134010 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 1993/2854 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...