/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:17:04,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:17:04,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:17:04,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:17:04,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:17:04,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:17:04,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:17:04,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:17:04,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:17:04,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:17:04,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:17:04,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:17:04,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:17:04,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:17:04,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:17:04,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:17:04,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:17:04,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:17:04,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:17:04,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:17:04,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:17:04,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:17:04,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:17:04,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:17:04,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:17:04,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:17:04,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:17:04,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:17:04,940 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 20:17:04,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:17:04,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:17:05,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:17:05,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:17:05,001 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:17:05,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:17:05,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:17:05,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:17:05,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:17:05,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:17:05,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:17:05,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:17:05,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:17:05,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:17:05,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:17:05,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:17:05,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:17:05,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:17:05,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:17:05,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:17:05,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:17:05,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:17:05,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:17:05,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:17:05,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:17:05,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:17:05,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:17:05,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:17:05,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:17:05,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:17:05,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:17:05,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:17:05,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:17:05,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:17:05,353 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:17:05,353 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-18 20:17:05,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ee245b0d/92e4ea183187498f9f2500b2792637b6/FLAG8b83c93cd [2020-08-18 20:17:05,886 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:17:05,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-18 20:17:05,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ee245b0d/92e4ea183187498f9f2500b2792637b6/FLAG8b83c93cd [2020-08-18 20:17:06,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ee245b0d/92e4ea183187498f9f2500b2792637b6 [2020-08-18 20:17:06,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:17:06,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:17:06,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:17:06,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:17:06,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:17:06,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc40f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06, skipping insertion in model container [2020-08-18 20:17:06,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:17:06,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:17:06,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:17:06,550 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:17:06,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:17:06,579 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:17:06,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06 WrapperNode [2020-08-18 20:17:06,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:17:06,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:17:06,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:17:06,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:17:06,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (1/1) ... [2020-08-18 20:17:06,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:17:06,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:17:06,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:17:06,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:17:06,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (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 20:17:06,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:17:06,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:17:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-18 20:17:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-18 20:17:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:17:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:17:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:17:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-18 20:17:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-18 20:17:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:17:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:17:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:17:06,956 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:17:06,956 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 20:17:06,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:17:06 BoogieIcfgContainer [2020-08-18 20:17:06,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:17:06,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:17:06,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:17:06,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:17:06,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:17:06" (1/3) ... [2020-08-18 20:17:06,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75437766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:17:06, skipping insertion in model container [2020-08-18 20:17:06,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:06" (2/3) ... [2020-08-18 20:17:06,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75437766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:17:06, skipping insertion in model container [2020-08-18 20:17:06,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:17:06" (3/3) ... [2020-08-18 20:17:06,968 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-08-18 20:17:06,980 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:17:06,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:17:07,009 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:17:07,074 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:17:07,074 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:17:07,075 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:17:07,075 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:17:07,075 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:17:07,076 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:17:07,076 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:17:07,076 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:17:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 20:17:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 20:17:07,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:07,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:17:07,125 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-18 20:17:07,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:07,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145520547] [2020-08-18 20:17:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,344 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 20:17:07,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145520547] [2020-08-18 20:17:07,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:17:07,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:17:07,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719451562] [2020-08-18 20:17:07,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:17:07,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:17:07,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:17:07,373 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-18 20:17:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:07,473 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-18 20:17:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:17:07,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 20:17:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:07,485 INFO L225 Difference]: With dead ends: 44 [2020-08-18 20:17:07,486 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 20:17:07,489 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 20:17:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 20:17:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 20:17:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 20:17:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 20:17:07,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-18 20:17:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:07,537 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 20:17:07,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:17:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 20:17:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 20:17:07,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:07,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:17:07,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:17:07,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-18 20:17:07,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:07,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718196449] [2020-08-18 20:17:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,609 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 20:17:07,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718196449] [2020-08-18 20:17:07,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:17:07,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:17:07,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85041449] [2020-08-18 20:17:07,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:17:07,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:07,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:17:07,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:17:07,614 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-18 20:17:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:07,678 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 20:17:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:17:07,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 20:17:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:07,680 INFO L225 Difference]: With dead ends: 36 [2020-08-18 20:17:07,681 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 20:17:07,682 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 20:17:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 20:17:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 20:17:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 20:17:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 20:17:07,692 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-18 20:17:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:07,693 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 20:17:07,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:17:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 20:17:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:17:07,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:07,696 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 20:17:07,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:17:07,697 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-18 20:17:07,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:07,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546710561] [2020-08-18 20:17:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:17:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:07,843 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 20:17:07,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546710561] [2020-08-18 20:17:07,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:07,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:17:07,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441362400] [2020-08-18 20:17:07,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:17:07,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:17:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:17:07,846 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-18 20:17:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:07,940 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-18 20:17:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:17:07,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 20:17:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:07,943 INFO L225 Difference]: With dead ends: 58 [2020-08-18 20:17:07,944 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 20:17:07,945 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 20:17:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 20:17:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 20:17:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 20:17:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-18 20:17:07,956 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-18 20:17:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:07,956 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-18 20:17:07,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:17:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-18 20:17:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 20:17:07,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:07,959 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 20:17:07,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:17:07,959 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-18 20:17:07,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:07,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079841503] [2020-08-18 20:17:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,126 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 20:17:08,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079841503] [2020-08-18 20:17:08,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:08,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:17:08,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236097137] [2020-08-18 20:17:08,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:17:08,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:08,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:17:08,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:17:08,130 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-18 20:17:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:08,337 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-18 20:17:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:17:08,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-18 20:17:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:08,342 INFO L225 Difference]: With dead ends: 54 [2020-08-18 20:17:08,342 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 20:17:08,343 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 20:17:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 20:17:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-18 20:17:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 20:17:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-18 20:17:08,357 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-18 20:17:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:08,358 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-18 20:17:08,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:17:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-18 20:17:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 20:17:08,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:08,360 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 20:17:08,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:17:08,361 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-18 20:17:08,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:08,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100044779] [2020-08-18 20:17:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:17:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:17:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,498 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 20:17:08,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100044779] [2020-08-18 20:17:08,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:08,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:17:08,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744587404] [2020-08-18 20:17:08,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:17:08,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:17:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:17:08,502 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-18 20:17:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:08,575 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-18 20:17:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:17:08,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-18 20:17:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:08,578 INFO L225 Difference]: With dead ends: 94 [2020-08-18 20:17:08,578 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 20:17:08,580 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 20:17:08,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 20:17:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-18 20:17:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 20:17:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-18 20:17:08,592 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-18 20:17:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:08,593 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-18 20:17:08,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:17:08,593 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-18 20:17:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 20:17:08,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:08,595 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 20:17:08,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:17:08,596 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-18 20:17:08,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:08,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860087760] [2020-08-18 20:17:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,756 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 20:17:08,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860087760] [2020-08-18 20:17:08,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:08,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:17:08,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646909626] [2020-08-18 20:17:08,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:17:08,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:17:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:17:08,759 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-18 20:17:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:08,871 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-18 20:17:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:17:08,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 20:17:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:08,874 INFO L225 Difference]: With dead ends: 103 [2020-08-18 20:17:08,874 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 20:17:08,875 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 20:17:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 20:17:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 20:17:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 20:17:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-18 20:17:08,887 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-18 20:17:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:08,888 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-18 20:17:08,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:17:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-18 20:17:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 20:17:08,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:08,890 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 20:17:08,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:17:08,891 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:08,891 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-18 20:17:08,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:08,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184050805] [2020-08-18 20:17:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:08,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,049 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 20:17:09,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184050805] [2020-08-18 20:17:09,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:09,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:17:09,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81845834] [2020-08-18 20:17:09,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:17:09,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:17:09,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:17:09,052 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-18 20:17:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:09,246 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-18 20:17:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:17:09,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-18 20:17:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:09,249 INFO L225 Difference]: With dead ends: 86 [2020-08-18 20:17:09,249 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 20:17:09,250 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 20:17:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 20:17:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 20:17:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 20:17:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-18 20:17:09,268 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-18 20:17:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:09,268 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-18 20:17:09,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:17:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-18 20:17:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 20:17:09,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:09,272 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 20:17:09,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:17:09,272 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-18 20:17:09,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:09,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62322187] [2020-08-18 20:17:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 20:17:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,440 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 20:17:09,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62322187] [2020-08-18 20:17:09,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:09,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:17:09,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376481710] [2020-08-18 20:17:09,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:17:09,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:17:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:17:09,443 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-18 20:17:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:09,566 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-18 20:17:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:17:09,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-18 20:17:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:09,568 INFO L225 Difference]: With dead ends: 167 [2020-08-18 20:17:09,569 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 20:17:09,570 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 20:17:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 20:17:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-18 20:17:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 20:17:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-18 20:17:09,586 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-18 20:17:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:09,587 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-18 20:17:09,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:17:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-18 20:17:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 20:17:09,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:09,590 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 20:17:09,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:17:09,590 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-18 20:17:09,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:09,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859411432] [2020-08-18 20:17:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:09,746 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 20:17:09,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859411432] [2020-08-18 20:17:09,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:09,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:17:09,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383710434] [2020-08-18 20:17:09,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:17:09,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:17:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:17:09,749 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-18 20:17:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:09,955 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-18 20:17:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:17:09,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-18 20:17:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:09,957 INFO L225 Difference]: With dead ends: 188 [2020-08-18 20:17:09,958 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 20:17:09,959 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 20:17:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 20:17:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-18 20:17:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 20:17:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-18 20:17:09,975 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-18 20:17:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:09,975 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-18 20:17:09,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:17:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-18 20:17:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 20:17:09,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:09,978 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 20:17:09,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:17:09,979 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-18 20:17:09,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:09,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262578257] [2020-08-18 20:17:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,216 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 20:17:10,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262578257] [2020-08-18 20:17:10,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:10,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 20:17:10,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668557038] [2020-08-18 20:17:10,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 20:17:10,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 20:17:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:17:10,220 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-18 20:17:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:10,693 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-18 20:17:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 20:17:10,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-18 20:17:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:10,697 INFO L225 Difference]: With dead ends: 199 [2020-08-18 20:17:10,697 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 20:17:10,699 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 20:17:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 20:17:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-18 20:17:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 20:17:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-18 20:17:10,711 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-18 20:17:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:10,712 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-18 20:17:10,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 20:17:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-18 20:17:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 20:17:10,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:10,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:17:10,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:17:10,714 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-18 20:17:10,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:10,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670009420] [2020-08-18 20:17:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:10,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-18 20:17:11,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670009420] [2020-08-18 20:17:11,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:11,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 20:17:11,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27194850] [2020-08-18 20:17:11,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 20:17:11,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:11,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 20:17:11,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 20:17:11,091 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 17 states. [2020-08-18 20:17:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:11,307 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2020-08-18 20:17:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 20:17:11,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-08-18 20:17:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:11,310 INFO L225 Difference]: With dead ends: 96 [2020-08-18 20:17:11,310 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 20:17:11,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-18 20:17:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 20:17:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-08-18 20:17:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 20:17:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-08-18 20:17:11,330 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 68 [2020-08-18 20:17:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:11,331 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-08-18 20:17:11,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 20:17:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-08-18 20:17:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 20:17:11,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:11,333 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:17:11,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:17:11,334 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 2 times [2020-08-18 20:17:11,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:11,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480640624] [2020-08-18 20:17:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 20:17:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:17:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-18 20:17:11,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480640624] [2020-08-18 20:17:11,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:11,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:17:11,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900189604] [2020-08-18 20:17:11,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:17:11,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:11,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:17:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:17:11,478 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 7 states. [2020-08-18 20:17:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:11,568 INFO L93 Difference]: Finished difference Result 143 states and 199 transitions. [2020-08-18 20:17:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:17:11,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-18 20:17:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:11,573 INFO L225 Difference]: With dead ends: 143 [2020-08-18 20:17:11,573 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 20:17:11,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:17:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 20:17:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-18 20:17:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 20:17:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-08-18 20:17:11,581 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 69 [2020-08-18 20:17:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:11,581 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-08-18 20:17:11,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:17:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-08-18 20:17:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 20:17:11,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:11,583 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 20:17:11,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 20:17:11,583 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 3 times [2020-08-18 20:17:11,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:11,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660645052] [2020-08-18 20:17:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 20:17:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:11,797 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 20:17:11,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660645052] [2020-08-18 20:17:11,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:11,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:17:11,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545445712] [2020-08-18 20:17:11,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:17:11,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:11,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:17:11,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:17:11,800 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 10 states. [2020-08-18 20:17:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:12,005 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2020-08-18 20:17:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:17:12,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-18 20:17:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:12,007 INFO L225 Difference]: With dead ends: 131 [2020-08-18 20:17:12,007 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 20:17:12,009 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 20:17:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 20:17:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-18 20:17:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 20:17:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-08-18 20:17:12,023 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 110 [2020-08-18 20:17:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:12,025 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-08-18 20:17:12,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:17:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-08-18 20:17:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 20:17:12,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:12,028 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:17:12,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 20:17:12,028 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:12,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 2 times [2020-08-18 20:17:12,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:12,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253678307] [2020-08-18 20:17:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 20:17:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 40 proven. 124 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-08-18 20:17:12,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253678307] [2020-08-18 20:17:12,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:12,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:17:12,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431236117] [2020-08-18 20:17:12,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:17:12,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:17:12,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:17:12,454 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 10 states. [2020-08-18 20:17:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:12,629 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-08-18 20:17:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:17:12,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2020-08-18 20:17:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:12,633 INFO L225 Difference]: With dead ends: 77 [2020-08-18 20:17:12,633 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:17:12,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:17:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:17:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:17:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:17:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:17:12,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-18 20:17:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:12,635 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:17:12,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:17:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:17:12,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:17:12,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 20:17:12,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:17:13,111 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2020-08-18 20:17:13,329 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-08-18 20:17:13,333 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 20:17:13,334 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:17:13,334 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:17:13,334 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:17:13,334 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:17:13,334 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:17:13,334 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-18 20:17:13,335 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-18 20:17:13,335 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-18 20:17:13,335 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-18 20:17:13,335 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 20:17:13,335 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 20:17:13,335 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-08-18 20:17:13,336 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-18 20:17:13,336 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-18 20:17:13,336 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-18 20:17:13,336 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 20:17:13,336 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 20:17:13,338 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|) (<= |fibo2_#in~n| 2)) (and (<= 4 fibo2_~n) .cse0))) [2020-08-18 20:17:13,338 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-18 20:17:13,338 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-18 20:17:13,338 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-18 20:17:13,339 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-18 20:17:13,339 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-18 20:17:13,339 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-18 20:17:13,339 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-18 20:17:13,339 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-18 20:17:13,340 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 3) .cse0) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 fibo1_~n))) [2020-08-18 20:17:13,340 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-18 20:17:13,340 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-18 20:17:13,340 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-18 20:17:13,341 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-18 20:17:13,341 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-18 20:17:13,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:17:13 BoogieIcfgContainer [2020-08-18 20:17:13,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:17:13,354 INFO L168 Benchmark]: Toolchain (without parser) took 7091.79 ms. Allocated memory was 144.2 MB in the beginning and 331.9 MB in the end (delta: 187.7 MB). Free memory was 100.5 MB in the beginning and 239.4 MB in the end (delta: -138.9 MB). Peak memory consumption was 167.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:13,355 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 20:17:13,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.27 ms. Allocated memory is still 144.2 MB. Free memory was 100.3 MB in the beginning and 90.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:13,362 INFO L168 Benchmark]: Boogie Preprocessor took 114.86 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 90.7 MB in the beginning and 179.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:13,367 INFO L168 Benchmark]: RCFGBuilder took 264.39 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 165.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:13,370 INFO L168 Benchmark]: TraceAbstraction took 6389.28 ms. Allocated memory was 200.8 MB in the beginning and 331.9 MB in the end (delta: 131.1 MB). Free memory was 164.9 MB in the beginning and 239.4 MB in the end (delta: -74.5 MB). Peak memory consumption was 175.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:13,377 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.27 ms. Allocated memory is still 144.2 MB. Free memory was 100.3 MB in the beginning and 90.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.86 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 90.7 MB in the beginning and 179.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 264.39 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 165.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6389.28 ms. Allocated memory was 200.8 MB in the beginning and 331.9 MB in the end (delta: 131.1 MB). Free memory was 164.9 MB in the beginning and 239.4 MB in the end (delta: -74.5 MB). Peak memory consumption was 175.4 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: 5.5s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 436 SDtfs, 293 SDslu, 2109 SDs, 0 SdLazy, 1568 SolverSat, 150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 48 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 344 PreInvPairs, 398 NumberOfFragments, 94 HoareAnnotationTreeSize, 344 FomulaSimplifications, 448 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 770 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 774 NumberOfCodeBlocks, 774 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 760 ConstructedInterpolants, 0 QuantifiedInterpolants, 103564 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1159 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...