/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:27:29,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:27:29,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:27:29,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:27:29,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:27:29,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:27:29,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:27:29,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:27:29,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:27:29,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:27:29,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:27:29,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:27:29,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:27:29,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:27:29,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:27:29,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:27:29,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:27:29,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:27:29,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:27:29,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:27:29,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:27:29,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:27:29,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:27:29,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:27:29,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:27:29,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:27:29,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:27:29,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:27:29,882 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:27:29,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:27:29,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:27:29,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:27:29,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:27:29,921 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:27:29,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:27:29,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:27:29,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:27:29,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:27:29,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:27:29,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:27:29,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:27:29,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:27:29,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:27:29,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:27:29,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:27:29,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:27:29,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:27:29,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:27:29,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:27:29,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:27:29,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:27:29,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:27:29,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:27:29,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:27:29,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:27:29,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:27:29,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:27:29,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:27:29,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:27:30,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:27:30,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:27:30,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:27:30,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:27:30,259 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:27:30,260 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-18 15:27:30,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c2cded62/2c3e203f083147c2976496860bcc4799/FLAGb5e74c568 [2020-08-18 15:27:30,774 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:27:30,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-18 15:27:30,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c2cded62/2c3e203f083147c2976496860bcc4799/FLAGb5e74c568 [2020-08-18 15:27:31,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c2cded62/2c3e203f083147c2976496860bcc4799 [2020-08-18 15:27:31,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:27:31,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:27:31,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:27:31,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:27:31,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:27:31,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7d2fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31, skipping insertion in model container [2020-08-18 15:27:31,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:27:31,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:27:31,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:27:31,424 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:27:31,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:27:31,450 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:27:31,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31 WrapperNode [2020-08-18 15:27:31,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:27:31,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:27:31,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:27:31,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:27:31,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... [2020-08-18 15:27:31,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:27:31,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:27:31,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:27:31,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:27:31,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:27:31,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:27:31,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:27:31,606 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-18 15:27:31,606 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-18 15:27:31,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:27:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:27:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:27:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-18 15:27:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-18 15:27:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:27:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:27:31,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:27:31,792 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:27:31,793 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 15:27:31,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:27:31 BoogieIcfgContainer [2020-08-18 15:27:31,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:27:31,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:27:31,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:27:31,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:27:31,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:27:31" (1/3) ... [2020-08-18 15:27:31,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3583d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:27:31, skipping insertion in model container [2020-08-18 15:27:31,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:31" (2/3) ... [2020-08-18 15:27:31,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3583d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:27:31, skipping insertion in model container [2020-08-18 15:27:31,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:27:31" (3/3) ... [2020-08-18 15:27:31,805 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-08-18 15:27:31,815 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:27:31,822 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:27:31,835 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:27:31,859 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:27:31,859 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:27:31,859 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:27:31,859 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:27:31,859 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:27:31,860 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:27:31,860 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:27:31,860 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:27:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 15:27:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:27:31,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:31,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:31,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-18 15:27:31,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:31,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043916845] [2020-08-18 15:27:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:27:32,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043916845] [2020-08-18 15:27:32,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:27:32,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:27:32,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244003531] [2020-08-18 15:27:32,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:27:32,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:32,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:27:32,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:27:32,094 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-18 15:27:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:32,268 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-18 15:27:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:27:32,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 15:27:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:32,282 INFO L225 Difference]: With dead ends: 44 [2020-08-18 15:27:32,283 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 15:27:32,287 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 [2020-08-18 15:27:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 15:27:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 15:27:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:27:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 15:27:32,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-18 15:27:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:32,336 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 15:27:32,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:27:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 15:27:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 15:27:32,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:32,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:32,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:27:32,339 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-18 15:27:32,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:32,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14314781] [2020-08-18 15:27:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:27:32,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14314781] [2020-08-18 15:27:32,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:27:32,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:27:32,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417888418] [2020-08-18 15:27:32,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:27:32,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:27:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:27:32,411 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-18 15:27:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:32,492 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 15:27:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:27:32,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 15:27:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:32,496 INFO L225 Difference]: With dead ends: 36 [2020-08-18 15:27:32,496 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 15:27:32,498 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 [2020-08-18 15:27:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 15:27:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 15:27:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:27:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 15:27:32,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-18 15:27:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:32,523 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 15:27:32,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:27:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 15:27:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 15:27:32,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:32,527 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:32,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:27:32,528 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-18 15:27:32,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:32,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714949864] [2020-08-18 15:27:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:27:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 15:27:32,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714949864] [2020-08-18 15:27:32,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:32,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:27:32,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466038079] [2020-08-18 15:27:32,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:27:32,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:32,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:27:32,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:27:32,717 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-18 15:27:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:32,810 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-18 15:27:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:27:32,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 15:27:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:32,813 INFO L225 Difference]: With dead ends: 58 [2020-08-18 15:27:32,813 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 15:27:32,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 15:27:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 15:27:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 15:27:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-18 15:27:32,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-18 15:27:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:32,826 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-18 15:27:32,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:27:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-18 15:27:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 15:27:32,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:32,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:32,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:27:32,829 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-18 15:27:32,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:32,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210204456] [2020-08-18 15:27:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 15:27:32,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210204456] [2020-08-18 15:27:32,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:32,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:27:32,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520047012] [2020-08-18 15:27:32,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:27:32,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:27:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:27:32,958 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-18 15:27:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:33,175 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-18 15:27:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:27:33,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-18 15:27:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:33,182 INFO L225 Difference]: With dead ends: 54 [2020-08-18 15:27:33,184 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 15:27:33,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:27:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 15:27:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-18 15:27:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 15:27:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-18 15:27:33,207 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-18 15:27:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:33,208 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-18 15:27:33,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:27:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-18 15:27:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 15:27:33,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:33,211 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:33,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:27:33,211 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-18 15:27:33,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:33,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863679699] [2020-08-18 15:27:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:27:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:27:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 15:27:33,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863679699] [2020-08-18 15:27:33,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:33,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 15:27:33,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352854668] [2020-08-18 15:27:33,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:27:33,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:33,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:27:33,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:27:33,323 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-18 15:27:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:33,397 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-18 15:27:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:27:33,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-18 15:27:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:33,400 INFO L225 Difference]: With dead ends: 94 [2020-08-18 15:27:33,400 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 15:27:33,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:27:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 15:27:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-18 15:27:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 15:27:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-18 15:27:33,414 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-18 15:27:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:33,415 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-18 15:27:33,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:27:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-18 15:27:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 15:27:33,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:33,417 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:33,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:27:33,418 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:33,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-18 15:27:33,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:33,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207809106] [2020-08-18 15:27:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 15:27:33,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207809106] [2020-08-18 15:27:33,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:33,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:27:33,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564028507] [2020-08-18 15:27:33,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:27:33,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:27:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:33,576 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-18 15:27:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:33,709 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-18 15:27:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:27:33,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 15:27:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:33,713 INFO L225 Difference]: With dead ends: 103 [2020-08-18 15:27:33,713 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 15:27:33,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 15:27:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 15:27:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 15:27:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-18 15:27:33,727 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-18 15:27:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:33,728 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-18 15:27:33,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:27:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-18 15:27:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 15:27:33,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:33,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:33,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:27:33,732 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-18 15:27:33,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:33,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422250601] [2020-08-18 15:27:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 15:27:33,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422250601] [2020-08-18 15:27:33,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:33,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:27:33,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877150889] [2020-08-18 15:27:33,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:27:33,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:27:33,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:33,858 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-18 15:27:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:34,064 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-18 15:27:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:27:34,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-18 15:27:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:34,066 INFO L225 Difference]: With dead ends: 86 [2020-08-18 15:27:34,067 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 15:27:34,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:27:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 15:27:34,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 15:27:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 15:27:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-18 15:27:34,083 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-18 15:27:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:34,084 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-18 15:27:34,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:27:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-18 15:27:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 15:27:34,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:34,087 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:34,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:27:34,088 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:34,088 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-18 15:27:34,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:34,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830111012] [2020-08-18 15:27:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 15:27:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 15:27:34,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830111012] [2020-08-18 15:27:34,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:34,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:27:34,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211426232] [2020-08-18 15:27:34,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:27:34,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:34,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:27:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:34,227 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-18 15:27:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:34,356 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-18 15:27:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:27:34,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-18 15:27:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:34,359 INFO L225 Difference]: With dead ends: 167 [2020-08-18 15:27:34,359 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 15:27:34,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 15:27:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-18 15:27:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 15:27:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-18 15:27:34,381 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-18 15:27:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:34,382 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-18 15:27:34,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:27:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-18 15:27:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 15:27:34,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:34,387 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:34,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:27:34,387 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-18 15:27:34,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:34,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596492570] [2020-08-18 15:27:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 15:27:34,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596492570] [2020-08-18 15:27:34,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:34,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:27:34,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659136495] [2020-08-18 15:27:34,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:27:34,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:27:34,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:34,588 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-18 15:27:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:34,852 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-18 15:27:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:27:34,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-18 15:27:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:34,857 INFO L225 Difference]: With dead ends: 188 [2020-08-18 15:27:34,857 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 15:27:34,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:27:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 15:27:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-18 15:27:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 15:27:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-18 15:27:34,895 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-18 15:27:34,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:34,896 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-18 15:27:34,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:27:34,896 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-18 15:27:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 15:27:34,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:34,901 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:34,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:27:34,902 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-18 15:27:34,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:34,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797666619] [2020-08-18 15:27:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:34,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-18 15:27:35,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797666619] [2020-08-18 15:27:35,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:35,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 15:27:35,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446656485] [2020-08-18 15:27:35,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:27:35,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:27:35,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:27:35,212 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-18 15:27:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:35,620 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-18 15:27:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 15:27:35,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-18 15:27:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:35,624 INFO L225 Difference]: With dead ends: 199 [2020-08-18 15:27:35,625 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 15:27:35,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:27:35,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 15:27:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-18 15:27:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 15:27:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-18 15:27:35,647 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-18 15:27:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:35,648 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-18 15:27:35,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:27:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-18 15:27:35,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 15:27:35,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:35,650 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:35,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:27:35,651 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-18 15:27:35,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:35,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890831342] [2020-08-18 15:27:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 15:27:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-18 15:27:35,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890831342] [2020-08-18 15:27:35,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:35,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:27:35,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151112417] [2020-08-18 15:27:35,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:27:35,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:35,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:27:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:35,943 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-18 15:27:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:36,171 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-18 15:27:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 15:27:36,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-18 15:27:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:36,174 INFO L225 Difference]: With dead ends: 142 [2020-08-18 15:27:36,175 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 15:27:36,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:27:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 15:27:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 15:27:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 15:27:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-18 15:27:36,184 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-18 15:27:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:36,184 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-18 15:27:36,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:27:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-18 15:27:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 15:27:36,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:36,189 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:36,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:27:36,190 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-18 15:27:36,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:36,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842081555] [2020-08-18 15:27:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 15:27:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 15:27:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 15:27:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 98 proven. 322 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-08-18 15:27:36,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842081555] [2020-08-18 15:27:36,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:36,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 15:27:36,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829659878] [2020-08-18 15:27:36,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:27:36,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:27:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:27:36,638 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-08-18 15:27:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:36,977 INFO L93 Difference]: Finished difference Result 178 states and 263 transitions. [2020-08-18 15:27:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 15:27:36,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2020-08-18 15:27:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:36,980 INFO L225 Difference]: With dead ends: 178 [2020-08-18 15:27:36,980 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 15:27:36,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:27:36,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 15:27:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-08-18 15:27:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 15:27:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-08-18 15:27:36,992 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 192 [2020-08-18 15:27:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:36,992 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-08-18 15:27:36,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:27:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-08-18 15:27:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-18 15:27:36,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:36,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:36,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:27:36,995 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1677699577, now seen corresponding path program 1 times [2020-08-18 15:27:36,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:36,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122757084] [2020-08-18 15:27:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 15:27:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 77 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-18 15:27:37,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122757084] [2020-08-18 15:27:37,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:37,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:27:37,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546219358] [2020-08-18 15:27:37,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:27:37,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:27:37,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:27:37,229 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 11 states. [2020-08-18 15:27:37,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:37,484 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-08-18 15:27:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 15:27:37,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-08-18 15:27:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:37,486 INFO L225 Difference]: With dead ends: 172 [2020-08-18 15:27:37,486 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 15:27:37,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:27:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 15:27:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-08-18 15:27:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-18 15:27:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-08-18 15:27:37,502 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 96 [2020-08-18 15:27:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:37,502 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-08-18 15:27:37,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:27:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-08-18 15:27:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 15:27:37,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:37,506 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:37,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:27:37,507 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash 265701462, now seen corresponding path program 2 times [2020-08-18 15:27:37,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:37,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009228330] [2020-08-18 15:27:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 15:27:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-18 15:27:37,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009228330] [2020-08-18 15:27:37,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:37,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 15:27:37,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389671585] [2020-08-18 15:27:37,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:27:37,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:37,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:27:37,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:27:37,822 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 12 states. [2020-08-18 15:27:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:38,162 INFO L93 Difference]: Finished difference Result 185 states and 262 transitions. [2020-08-18 15:27:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 15:27:38,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-08-18 15:27:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:38,164 INFO L225 Difference]: With dead ends: 185 [2020-08-18 15:27:38,164 INFO L226 Difference]: Without dead ends: 104 [2020-08-18 15:27:38,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:27:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-18 15:27:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-08-18 15:27:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-18 15:27:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-08-18 15:27:38,175 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 110 [2020-08-18 15:27:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:38,176 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-08-18 15:27:38,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:27:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-08-18 15:27:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 15:27:38,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:38,178 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:38,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:27:38,178 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-08-18 15:27:38,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:38,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129462587] [2020-08-18 15:27:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 15:27:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-08-18 15:27:38,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129462587] [2020-08-18 15:27:38,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:38,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 15:27:38,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999215753] [2020-08-18 15:27:38,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 15:27:38,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 15:27:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:27:38,827 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand 22 states. [2020-08-18 15:27:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:39,300 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2020-08-18 15:27:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 15:27:39,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-08-18 15:27:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:39,304 INFO L225 Difference]: With dead ends: 105 [2020-08-18 15:27:39,304 INFO L226 Difference]: Without dead ends: 101 [2020-08-18 15:27:39,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-08-18 15:27:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-18 15:27:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-08-18 15:27:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 15:27:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2020-08-18 15:27:39,322 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 109 [2020-08-18 15:27:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:39,323 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2020-08-18 15:27:39,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 15:27:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2020-08-18 15:27:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 15:27:39,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:39,325 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:39,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 15:27:39,326 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:39,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1650675485, now seen corresponding path program 4 times [2020-08-18 15:27:39,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:39,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208304801] [2020-08-18 15:27:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 15:27:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 94 proven. 190 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 15:27:39,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208304801] [2020-08-18 15:27:39,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:39,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 15:27:39,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816800556] [2020-08-18 15:27:39,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 15:27:39,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:39,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 15:27:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:27:39,848 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 14 states. [2020-08-18 15:27:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:40,462 INFO L93 Difference]: Finished difference Result 208 states and 318 transitions. [2020-08-18 15:27:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 15:27:40,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-18 15:27:40,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:40,467 INFO L225 Difference]: With dead ends: 208 [2020-08-18 15:27:40,467 INFO L226 Difference]: Without dead ends: 113 [2020-08-18 15:27:40,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-18 15:27:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-18 15:27:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-08-18 15:27:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-18 15:27:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-08-18 15:27:40,479 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 150 [2020-08-18 15:27:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:40,480 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-08-18 15:27:40,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 15:27:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-08-18 15:27:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-18 15:27:40,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:40,483 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:40,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 15:27:40,483 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 215516676, now seen corresponding path program 5 times [2020-08-18 15:27:40,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:40,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017485626] [2020-08-18 15:27:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 15:27:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 15:27:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 15:27:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 119 proven. 187 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2020-08-18 15:27:40,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017485626] [2020-08-18 15:27:40,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:40,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:27:40,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360745790] [2020-08-18 15:27:40,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:27:40,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:27:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:27:40,946 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 11 states. [2020-08-18 15:27:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:41,207 INFO L93 Difference]: Finished difference Result 199 states and 275 transitions. [2020-08-18 15:27:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 15:27:41,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 190 [2020-08-18 15:27:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:41,210 INFO L225 Difference]: With dead ends: 199 [2020-08-18 15:27:41,211 INFO L226 Difference]: Without dead ends: 108 [2020-08-18 15:27:41,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:27:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-18 15:27:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-08-18 15:27:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 15:27:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2020-08-18 15:27:41,225 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 190 [2020-08-18 15:27:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:41,225 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2020-08-18 15:27:41,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:27:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2020-08-18 15:27:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 15:27:41,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:41,228 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:41,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 15:27:41,228 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 6 times [2020-08-18 15:27:41,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:41,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616236204] [2020-08-18 15:27:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 15:27:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 15:27:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 156 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-08-18 15:27:41,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616236204] [2020-08-18 15:27:41,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:41,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:27:41,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091380118] [2020-08-18 15:27:41,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:27:41,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:27:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:27:41,603 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand 11 states. [2020-08-18 15:27:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:41,851 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2020-08-18 15:27:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 15:27:41,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 150 [2020-08-18 15:27:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:41,853 INFO L225 Difference]: With dead ends: 123 [2020-08-18 15:27:41,853 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:27:41,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-08-18 15:27:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:27:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:27:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:27:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:27:41,855 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 150 [2020-08-18 15:27:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:41,856 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:27:41,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:27:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:27:41,856 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:27:41,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 15:27:41,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:27:42,896 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2020-08-18 15:27:43,305 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2020-08-18 15:27:43,310 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 15:27:43,310 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:27:43,311 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:27:43,311 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 15:27:43,311 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 15:27:43,311 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 15:27:43,311 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-18 15:27:43,311 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-18 15:27:43,311 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-18 15:27:43,312 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-18 15:27:43,312 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 15:27:43,312 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 15:27:43,312 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-18 15:27:43,312 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-18 15:27:43,312 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-18 15:27:43,312 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-18 15:27:43,314 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-18 15:27:43,314 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 15:27:43,315 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| 2))) (and (or (and .cse0 (<= 5 fibo2_~n)) (and (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 2) .cse0) .cse1) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|)) (not .cse1)))) [2020-08-18 15:27:43,316 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-18 15:27:43,316 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-18 15:27:43,316 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-18 15:27:43,317 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-18 15:27:43,317 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-18 15:27:43,317 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-18 15:27:43,317 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) [2020-08-18 15:27:43,318 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-18 15:27:43,318 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 |fibo1_#in~n|)) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#t~ret0|) .cse0 (<= |fibo1_#t~ret0| 3)) (and .cse0 (<= 6 |fibo1_#in~n|)) (and (<= fibo1_~n 4) .cse0)))) [2020-08-18 15:27:43,318 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-18 15:27:43,318 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-18 15:27:43,318 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-18 15:27:43,318 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-18 15:27:43,318 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-18 15:27:43,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:27:43 BoogieIcfgContainer [2020-08-18 15:27:43,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:27:43,331 INFO L168 Benchmark]: Toolchain (without parser) took 12156.19 ms. Allocated memory was 141.0 MB in the beginning and 403.2 MB in the end (delta: 262.1 MB). Free memory was 104.4 MB in the beginning and 337.2 MB in the end (delta: -232.8 MB). Peak memory consumption was 237.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:43,335 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-18 15:27:43,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.26 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:43,344 INFO L168 Benchmark]: Boogie Preprocessor took 97.81 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.7 MB in the beginning and 182.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:43,349 INFO L168 Benchmark]: RCFGBuilder took 247.35 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:43,350 INFO L168 Benchmark]: TraceAbstraction took 11531.60 ms. Allocated memory was 203.4 MB in the beginning and 403.2 MB in the end (delta: 199.8 MB). Free memory was 168.3 MB in the beginning and 337.2 MB in the end (delta: -168.9 MB). Peak memory consumption was 238.9 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:43,356 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.26 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.81 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.7 MB in the beginning and 182.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 247.35 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11531.60 ms. Allocated memory was 203.4 MB in the beginning and 403.2 MB in the end (delta: 199.8 MB). Free memory was 168.3 MB in the beginning and 337.2 MB in the end (delta: -168.9 MB). Peak memory consumption was 238.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.0s, OverallIterations: 18, TraceHistogramMax: 17, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 563 SDtfs, 507 SDslu, 3315 SDs, 0 SdLazy, 3083 SolverSat, 339 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 724 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 545 PreInvPairs, 724 NumberOfFragments, 111 HoareAnnotationTreeSize, 545 FomulaSimplifications, 2493 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3928 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1498 NumberOfCodeBlocks, 1498 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1480 ConstructedInterpolants, 0 QuantifiedInterpolants, 311578 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 3047/4287 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...