/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:56:09,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:56:09,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:56:09,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:56:09,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:56:09,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:56:09,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:56:09,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:56:09,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:56:09,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:56:09,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:56:09,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:56:09,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:56:09,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:56:09,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:56:09,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:56:10,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:56:10,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:56:10,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:56:10,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:56:10,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:56:10,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:56:10,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:56:10,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:56:10,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:56:10,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:56:10,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:56:10,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:56:10,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:56:10,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 14:56:10,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:56:10,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:56:10,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:56:10,052 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 [2020-09-24 14:56:10,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:56:10,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:56:10,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:56:10,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:56:10,112 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:56:10,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:56:10,113 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:56:10,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:56:10,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:56:10,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:56:10,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:56:10,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:56:10,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:56:10,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:56:10,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:56:10,115 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:56:10,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:56:10,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:56:10,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:56:10,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:56:10,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:56:10,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:56:10,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:56:10,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:56:10,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:56:10,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:56:10,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:56:10,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:56:10,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:56:10,118 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:56:10,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:56:10,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:56:10,612 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:56:10,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:56:10,614 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:56:10,615 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-09-24 14:56:10,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8e02917d/890a61c37eae4cc39d30dd17b002928d/FLAGcbc19d029 [2020-09-24 14:56:11,246 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:56:11,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-09-24 14:56:11,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8e02917d/890a61c37eae4cc39d30dd17b002928d/FLAGcbc19d029 [2020-09-24 14:56:11,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8e02917d/890a61c37eae4cc39d30dd17b002928d [2020-09-24 14:56:11,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:56:11,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:56:11,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:56:11,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:56:11,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:56:11,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:11,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4fe80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11, skipping insertion in model container [2020-09-24 14:56:11,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:11,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:56:11,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:56:11,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:56:11,865 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:56:11,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:56:11,905 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:56:11,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11 WrapperNode [2020-09-24 14:56:11,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:56:11,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:56:11,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:56:11,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:56:11,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:11,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:11,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:11,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:12,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:12,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:12,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (1/1) ... [2020-09-24 14:56:12,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:56:12,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:56:12,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:56:12,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:56:12,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (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 [2020-09-24 14:56:12,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:56:12,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:56:12,108 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-24 14:56:12,108 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-24 14:56:12,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:56:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:56:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:56:12,109 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-24 14:56:12,109 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-24 14:56:12,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:56:12,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:56:12,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:56:12,371 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:56:12,372 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 14:56:12,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:56:12 BoogieIcfgContainer [2020-09-24 14:56:12,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:56:12,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:56:12,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:56:12,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:56:12,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:56:11" (1/3) ... [2020-09-24 14:56:12,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537751d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:56:12, skipping insertion in model container [2020-09-24 14:56:12,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:56:11" (2/3) ... [2020-09-24 14:56:12,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537751d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:56:12, skipping insertion in model container [2020-09-24 14:56:12,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:56:12" (3/3) ... [2020-09-24 14:56:12,415 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-09-24 14:56:12,428 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:56:12,439 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:56:12,462 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:56:12,506 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:56:12,506 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:56:12,507 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:56:12,507 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:56:12,507 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:56:12,507 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:56:12,508 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:56:12,508 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:56:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-24 14:56:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 14:56:12,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:12,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:12,548 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-24 14:56:12,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:12,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60706156] [2020-09-24 14:56:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:12,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:12,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:56:12,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60706156] [2020-09-24 14:56:12,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:56:12,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:56:12,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949625800] [2020-09-24 14:56:12,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:56:12,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:56:12,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:56:12,832 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-24 14:56:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:12,969 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-24 14:56:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:56:12,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 14:56:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:12,986 INFO L225 Difference]: With dead ends: 58 [2020-09-24 14:56:12,986 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 14:56:12,991 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 [2020-09-24 14:56:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 14:56:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-24 14:56:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 14:56:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 14:56:13,050 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-24 14:56:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:13,050 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 14:56:13,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:56:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 14:56:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 14:56:13,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:13,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:13,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:56:13,054 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:13,055 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-24 14:56:13,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:13,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320716394] [2020-09-24 14:56:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:56:13,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320716394] [2020-09-24 14:56:13,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:56:13,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:56:13,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451945810] [2020-09-24 14:56:13,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:56:13,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:13,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:56:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:56:13,138 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-24 14:56:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:13,225 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-24 14:56:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:56:13,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 14:56:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:13,228 INFO L225 Difference]: With dead ends: 50 [2020-09-24 14:56:13,229 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 14:56:13,232 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 [2020-09-24 14:56:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 14:56:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 14:56:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 14:56:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 14:56:13,255 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-24 14:56:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:13,256 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 14:56:13,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:56:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 14:56:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 14:56:13,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:13,262 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 14:56:13,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:56:13,264 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-24 14:56:13,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:13,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515092773] [2020-09-24 14:56:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 14:56:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:56:13,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515092773] [2020-09-24 14:56:13,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:13,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:56:13,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615812927] [2020-09-24 14:56:13,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:56:13,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:56:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:56:13,443 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-09-24 14:56:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:13,544 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-09-24 14:56:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:56:13,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 14:56:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:13,547 INFO L225 Difference]: With dead ends: 82 [2020-09-24 14:56:13,547 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 14:56:13,549 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 [2020-09-24 14:56:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 14:56:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-24 14:56:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 14:56:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-09-24 14:56:13,561 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-09-24 14:56:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:13,561 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-09-24 14:56:13,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:56:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-09-24 14:56:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 14:56:13,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:13,564 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:13,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:56:13,565 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-09-24 14:56:13,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:13,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82221602] [2020-09-24 14:56:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:56:13,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82221602] [2020-09-24 14:56:13,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:13,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:56:13,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600223163] [2020-09-24 14:56:13,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:56:13,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:13,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:56:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:56:13,719 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-09-24 14:56:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:13,918 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-09-24 14:56:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:56:13,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-24 14:56:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:13,922 INFO L225 Difference]: With dead ends: 74 [2020-09-24 14:56:13,922 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 14:56:13,923 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 [2020-09-24 14:56:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 14:56:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-09-24 14:56:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 14:56:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-09-24 14:56:13,938 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 34 [2020-09-24 14:56:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:13,938 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-09-24 14:56:13,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:56:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-09-24 14:56:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 14:56:13,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:13,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:13,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:56:13,942 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:13,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-09-24 14:56:13,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:13,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028995887] [2020-09-24 14:56:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:13,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 14:56:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 14:56:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 14:56:14,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028995887] [2020-09-24 14:56:14,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:14,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 14:56:14,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936948422] [2020-09-24 14:56:14,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:56:14,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:14,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:56:14,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:56:14,127 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 6 states. [2020-09-24 14:56:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:14,214 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2020-09-24 14:56:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:56:14,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-09-24 14:56:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:14,217 INFO L225 Difference]: With dead ends: 130 [2020-09-24 14:56:14,217 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 14:56:14,219 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 [2020-09-24 14:56:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 14:56:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-24 14:56:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 14:56:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-09-24 14:56:14,233 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 50 [2020-09-24 14:56:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:14,234 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-09-24 14:56:14,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:56:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-09-24 14:56:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 14:56:14,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:14,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:14,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:56:14,238 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-09-24 14:56:14,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:14,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452799897] [2020-09-24 14:56:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:56:14,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452799897] [2020-09-24 14:56:14,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:14,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:56:14,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027473550] [2020-09-24 14:56:14,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:56:14,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:56:14,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:56:14,396 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 8 states. [2020-09-24 14:56:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:14,531 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2020-09-24 14:56:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:56:14,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-24 14:56:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:14,535 INFO L225 Difference]: With dead ends: 142 [2020-09-24 14:56:14,535 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 14:56:14,537 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 [2020-09-24 14:56:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 14:56:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-09-24 14:56:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 14:56:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-09-24 14:56:14,562 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2020-09-24 14:56:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:14,565 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-09-24 14:56:14,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:56:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-09-24 14:56:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 14:56:14,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:14,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:14,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:56:14,573 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1703786405, now seen corresponding path program 1 times [2020-09-24 14:56:14,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:14,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133003138] [2020-09-24 14:56:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 14:56:14,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133003138] [2020-09-24 14:56:14,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:14,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:56:14,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961163458] [2020-09-24 14:56:14,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:56:14,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:14,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:56:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:56:14,819 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 8 states. [2020-09-24 14:56:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:15,020 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2020-09-24 14:56:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:56:15,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-09-24 14:56:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:15,027 INFO L225 Difference]: With dead ends: 118 [2020-09-24 14:56:15,027 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 14:56:15,028 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 [2020-09-24 14:56:15,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 14:56:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-09-24 14:56:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-24 14:56:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2020-09-24 14:56:15,069 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 52 [2020-09-24 14:56:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:15,069 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2020-09-24 14:56:15,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:56:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2020-09-24 14:56:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 14:56:15,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:15,078 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:15,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:56:15,078 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash -521446491, now seen corresponding path program 1 times [2020-09-24 14:56:15,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:15,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766770324] [2020-09-24 14:56:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 14:56:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-24 14:56:15,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766770324] [2020-09-24 14:56:15,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:15,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:56:15,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420898473] [2020-09-24 14:56:15,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:56:15,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:15,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:56:15,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:56:15,278 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand 8 states. [2020-09-24 14:56:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:15,415 INFO L93 Difference]: Finished difference Result 227 states and 348 transitions. [2020-09-24 14:56:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:56:15,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-09-24 14:56:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:15,418 INFO L225 Difference]: With dead ends: 227 [2020-09-24 14:56:15,418 INFO L226 Difference]: Without dead ends: 127 [2020-09-24 14:56:15,420 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 [2020-09-24 14:56:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-24 14:56:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2020-09-24 14:56:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-24 14:56:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2020-09-24 14:56:15,439 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 69 [2020-09-24 14:56:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:15,439 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2020-09-24 14:56:15,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:56:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2020-09-24 14:56:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 14:56:15,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:15,442 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:15,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:56:15,443 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:15,443 INFO L82 PathProgramCache]: Analyzing trace with hash -439633211, now seen corresponding path program 1 times [2020-09-24 14:56:15,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:15,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223394605] [2020-09-24 14:56:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 14:56:15,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223394605] [2020-09-24 14:56:15,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:15,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:56:15,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042541847] [2020-09-24 14:56:15,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:56:15,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:15,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:56:15,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:56:15,633 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand 10 states. [2020-09-24 14:56:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:15,902 INFO L93 Difference]: Finished difference Result 257 states and 400 transitions. [2020-09-24 14:56:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:56:15,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-09-24 14:56:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:15,907 INFO L225 Difference]: With dead ends: 257 [2020-09-24 14:56:15,907 INFO L226 Difference]: Without dead ends: 151 [2020-09-24 14:56:15,909 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 [2020-09-24 14:56:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-24 14:56:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2020-09-24 14:56:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-24 14:56:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions. [2020-09-24 14:56:15,930 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 70 [2020-09-24 14:56:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:15,931 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 191 transitions. [2020-09-24 14:56:15,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:56:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions. [2020-09-24 14:56:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 14:56:15,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:15,935 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2020-09-24 14:56:15,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:56:15,935 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:15,936 INFO L82 PathProgramCache]: Analyzing trace with hash 307755032, now seen corresponding path program 2 times [2020-09-24 14:56:15,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:15,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595417789] [2020-09-24 14:56:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:15,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-09-24 14:56:16,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595417789] [2020-09-24 14:56:16,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:16,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:56:16,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238527664] [2020-09-24 14:56:16,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:56:16,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:56:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:56:16,227 INFO L87 Difference]: Start difference. First operand 133 states and 191 transitions. Second operand 12 states. [2020-09-24 14:56:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:16,689 INFO L93 Difference]: Finished difference Result 265 states and 420 transitions. [2020-09-24 14:56:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:56:16,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 105 [2020-09-24 14:56:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:16,697 INFO L225 Difference]: With dead ends: 265 [2020-09-24 14:56:16,697 INFO L226 Difference]: Without dead ends: 116 [2020-09-24 14:56:16,699 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 [2020-09-24 14:56:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-24 14:56:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-09-24 14:56:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 14:56:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-09-24 14:56:16,719 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 105 [2020-09-24 14:56:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:16,722 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-09-24 14:56:16,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:56:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-09-24 14:56:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 14:56:16,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:16,724 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2020-09-24 14:56:16,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:56:16,725 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1352793328, now seen corresponding path program 2 times [2020-09-24 14:56:16,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:16,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069822221] [2020-09-24 14:56:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-24 14:56:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-09-24 14:56:16,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069822221] [2020-09-24 14:56:16,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:16,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:56:16,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610947201] [2020-09-24 14:56:16,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:56:16,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:56:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:56:16,974 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 10 states. [2020-09-24 14:56:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:17,215 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2020-09-24 14:56:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:56:17,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 105 [2020-09-24 14:56:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:17,219 INFO L225 Difference]: With dead ends: 193 [2020-09-24 14:56:17,220 INFO L226 Difference]: Without dead ends: 105 [2020-09-24 14:56:17,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:56:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-24 14:56:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-09-24 14:56:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 14:56:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-09-24 14:56:17,232 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 105 [2020-09-24 14:56:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:17,234 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-09-24 14:56:17,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:56:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-09-24 14:56:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-24 14:56:17,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:17,237 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:17,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:56:17,237 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1260071360, now seen corresponding path program 1 times [2020-09-24 14:56:17,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:17,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849156192] [2020-09-24 14:56:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 26 proven. 126 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-09-24 14:56:17,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849156192] [2020-09-24 14:56:17,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:17,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:56:17,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881166169] [2020-09-24 14:56:17,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:56:17,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:17,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:56:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:56:17,603 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 10 states. [2020-09-24 14:56:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:17,859 INFO L93 Difference]: Finished difference Result 214 states and 288 transitions. [2020-09-24 14:56:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 14:56:17,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2020-09-24 14:56:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:17,862 INFO L225 Difference]: With dead ends: 214 [2020-09-24 14:56:17,863 INFO L226 Difference]: Without dead ends: 208 [2020-09-24 14:56:17,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:56:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-24 14:56:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2020-09-24 14:56:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-09-24 14:56:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 256 transitions. [2020-09-24 14:56:17,879 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 256 transitions. Word has length 140 [2020-09-24 14:56:17,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:17,880 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 256 transitions. [2020-09-24 14:56:17,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:56:17,880 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 256 transitions. [2020-09-24 14:56:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-24 14:56:17,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:17,884 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:17,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:56:17,884 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:17,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:17,885 INFO L82 PathProgramCache]: Analyzing trace with hash 239143290, now seen corresponding path program 2 times [2020-09-24 14:56:17,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:17,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458644953] [2020-09-24 14:56:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:17,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 14:56:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-24 14:56:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 201 proven. 189 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-09-24 14:56:18,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458644953] [2020-09-24 14:56:18,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:18,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:56:18,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537447166] [2020-09-24 14:56:18,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:56:18,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:56:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:56:18,427 INFO L87 Difference]: Start difference. First operand 189 states and 256 transitions. Second operand 14 states. [2020-09-24 14:56:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:18,966 INFO L93 Difference]: Finished difference Result 441 states and 670 transitions. [2020-09-24 14:56:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:56:18,966 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 211 [2020-09-24 14:56:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:18,969 INFO L225 Difference]: With dead ends: 441 [2020-09-24 14:56:18,969 INFO L226 Difference]: Without dead ends: 265 [2020-09-24 14:56:18,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:56:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-24 14:56:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 244. [2020-09-24 14:56:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-09-24 14:56:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 335 transitions. [2020-09-24 14:56:18,991 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 335 transitions. Word has length 211 [2020-09-24 14:56:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:18,991 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 335 transitions. [2020-09-24 14:56:18,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:56:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 335 transitions. [2020-09-24 14:56:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-09-24 14:56:18,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:18,999 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 19, 16, 16, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:18,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:56:19,000 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash 718103414, now seen corresponding path program 3 times [2020-09-24 14:56:19,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:19,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232709352] [2020-09-24 14:56:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 14:56:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-24 14:56:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 14:56:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 14:56:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 213 proven. 696 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2020-09-24 14:56:19,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232709352] [2020-09-24 14:56:19,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:19,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:56:19,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500934669] [2020-09-24 14:56:19,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:56:19,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:56:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:56:19,856 INFO L87 Difference]: Start difference. First operand 244 states and 335 transitions. Second operand 15 states. [2020-09-24 14:56:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:20,485 INFO L93 Difference]: Finished difference Result 558 states and 885 transitions. [2020-09-24 14:56:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:56:20,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 353 [2020-09-24 14:56:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:20,491 INFO L225 Difference]: With dead ends: 558 [2020-09-24 14:56:20,491 INFO L226 Difference]: Without dead ends: 322 [2020-09-24 14:56:20,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-09-24 14:56:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-24 14:56:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 304. [2020-09-24 14:56:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-09-24 14:56:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 426 transitions. [2020-09-24 14:56:20,527 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 426 transitions. Word has length 353 [2020-09-24 14:56:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:20,528 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 426 transitions. [2020-09-24 14:56:20,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:56:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 426 transitions. [2020-09-24 14:56:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-09-24 14:56:20,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:20,534 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:20,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:56:20,535 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:20,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2113087688, now seen corresponding path program 4 times [2020-09-24 14:56:20,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:20,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170835365] [2020-09-24 14:56:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:20,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 14:56:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1423 backedges. 261 proven. 446 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-09-24 14:56:21,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170835365] [2020-09-24 14:56:21,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:21,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:56:21,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601235197] [2020-09-24 14:56:21,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:56:21,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:56:21,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:56:21,391 INFO L87 Difference]: Start difference. First operand 304 states and 426 transitions. Second operand 16 states. [2020-09-24 14:56:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:22,291 INFO L93 Difference]: Finished difference Result 571 states and 855 transitions. [2020-09-24 14:56:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 14:56:22,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 281 [2020-09-24 14:56:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:22,309 INFO L225 Difference]: With dead ends: 571 [2020-09-24 14:56:22,309 INFO L226 Difference]: Without dead ends: 230 [2020-09-24 14:56:22,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:56:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-24 14:56:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 182. [2020-09-24 14:56:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-09-24 14:56:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 239 transitions. [2020-09-24 14:56:22,328 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 239 transitions. Word has length 281 [2020-09-24 14:56:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:22,330 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 239 transitions. [2020-09-24 14:56:22,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:56:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 239 transitions. [2020-09-24 14:56:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-09-24 14:56:22,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:22,334 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:22,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:56:22,335 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:22,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1117162661, now seen corresponding path program 5 times [2020-09-24 14:56:22,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:22,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507236964] [2020-09-24 14:56:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:22,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:22,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:22,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:22,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:22,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:22,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 14:56:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-09-24 14:56:23,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507236964] [2020-09-24 14:56:23,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:23,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 14:56:23,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304076264] [2020-09-24 14:56:23,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 14:56:23,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 14:56:23,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:56:23,672 INFO L87 Difference]: Start difference. First operand 182 states and 239 transitions. Second operand 28 states. [2020-09-24 14:56:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:25,058 INFO L93 Difference]: Finished difference Result 204 states and 266 transitions. [2020-09-24 14:56:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 14:56:25,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 228 [2020-09-24 14:56:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:25,062 INFO L225 Difference]: With dead ends: 204 [2020-09-24 14:56:25,062 INFO L226 Difference]: Without dead ends: 198 [2020-09-24 14:56:25,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=177, Invalid=2579, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 14:56:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-24 14:56:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2020-09-24 14:56:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-24 14:56:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 248 transitions. [2020-09-24 14:56:25,077 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 248 transitions. Word has length 228 [2020-09-24 14:56:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:25,079 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 248 transitions. [2020-09-24 14:56:25,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 14:56:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 248 transitions. [2020-09-24 14:56:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-09-24 14:56:25,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:25,084 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:25,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:56:25,084 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412883, now seen corresponding path program 6 times [2020-09-24 14:56:25,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:25,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724846739] [2020-09-24 14:56:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 14:56:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 332 proven. 297 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2020-09-24 14:56:25,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724846739] [2020-09-24 14:56:25,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:25,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:56:25,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949090694] [2020-09-24 14:56:25,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:56:25,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:56:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:56:25,971 INFO L87 Difference]: Start difference. First operand 188 states and 248 transitions. Second operand 18 states. [2020-09-24 14:56:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:26,855 INFO L93 Difference]: Finished difference Result 408 states and 591 transitions. [2020-09-24 14:56:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-24 14:56:26,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 246 [2020-09-24 14:56:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:26,860 INFO L225 Difference]: With dead ends: 408 [2020-09-24 14:56:26,860 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 14:56:26,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:56:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 14:56:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 194. [2020-09-24 14:56:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-24 14:56:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2020-09-24 14:56:26,876 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 246 [2020-09-24 14:56:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:26,876 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2020-09-24 14:56:26,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:56:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2020-09-24 14:56:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-09-24 14:56:26,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:26,886 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 25, 22, 21, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 7, 7, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:26,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 14:56:26,886 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -882421913, now seen corresponding path program 7 times [2020-09-24 14:56:26,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:26,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027802750] [2020-09-24 14:56:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 14:56:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2020-09-24 14:56:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 14:56:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:27,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4339 backedges. 391 proven. 1149 refuted. 0 times theorem prover too weak. 2799 trivial. 0 not checked. [2020-09-24 14:56:28,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027802750] [2020-09-24 14:56:28,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:28,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:56:28,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191352452] [2020-09-24 14:56:28,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:56:28,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:56:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:56:28,225 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 16 states. [2020-09-24 14:56:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:29,071 INFO L93 Difference]: Finished difference Result 426 states and 622 transitions. [2020-09-24 14:56:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 14:56:29,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 475 [2020-09-24 14:56:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:29,075 INFO L225 Difference]: With dead ends: 426 [2020-09-24 14:56:29,075 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 14:56:29,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:56:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 14:56:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 186. [2020-09-24 14:56:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-24 14:56:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 236 transitions. [2020-09-24 14:56:29,092 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 236 transitions. Word has length 475 [2020-09-24 14:56:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:29,092 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 236 transitions. [2020-09-24 14:56:29,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:56:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 236 transitions. [2020-09-24 14:56:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 14:56:29,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:29,102 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 15, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:29,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 14:56:29,102 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash 689403166, now seen corresponding path program 8 times [2020-09-24 14:56:29,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:29,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710600398] [2020-09-24 14:56:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 14:56:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 14:56:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 268 proven. 558 refuted. 0 times theorem prover too weak. 1223 trivial. 0 not checked. [2020-09-24 14:56:29,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710600398] [2020-09-24 14:56:29,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:29,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:56:29,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332059472] [2020-09-24 14:56:29,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:56:29,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:56:29,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:56:29,808 INFO L87 Difference]: Start difference. First operand 186 states and 236 transitions. Second operand 14 states. [2020-09-24 14:56:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:30,315 INFO L93 Difference]: Finished difference Result 357 states and 469 transitions. [2020-09-24 14:56:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:56:30,316 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 334 [2020-09-24 14:56:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:30,318 INFO L225 Difference]: With dead ends: 357 [2020-09-24 14:56:30,318 INFO L226 Difference]: Without dead ends: 184 [2020-09-24 14:56:30,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:56:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-24 14:56:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 174. [2020-09-24 14:56:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-24 14:56:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2020-09-24 14:56:30,330 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 334 [2020-09-24 14:56:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:30,331 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2020-09-24 14:56:30,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:56:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2020-09-24 14:56:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-09-24 14:56:30,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:56:30,337 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 14, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:56:30,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 14:56:30,338 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:56:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:56:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1910459706, now seen corresponding path program 9 times [2020-09-24 14:56:30,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:56:30,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266008283] [2020-09-24 14:56:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:56:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:56:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 14:56:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:56:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 14:56:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-24 14:56:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:56:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:56:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:56:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:30,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:56:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:56:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 174 proven. 436 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-09-24 14:56:31,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266008283] [2020-09-24 14:56:31,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:56:31,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:56:31,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996712725] [2020-09-24 14:56:31,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:56:31,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:56:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:56:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:56:31,128 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand 12 states. [2020-09-24 14:56:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:56:31,500 INFO L93 Difference]: Finished difference Result 197 states and 244 transitions. [2020-09-24 14:56:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:56:31,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 316 [2020-09-24 14:56:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:56:31,502 INFO L225 Difference]: With dead ends: 197 [2020-09-24 14:56:31,502 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 14:56:31,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:56:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 14:56:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 14:56:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 14:56:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 14:56:31,505 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 316 [2020-09-24 14:56:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:56:31,505 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 14:56:31,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:56:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 14:56:31,506 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 14:56:31,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 14:56:31,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 14:56:34,533 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 24 [2020-09-24 14:56:34,664 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 7 [2020-09-24 14:56:35,176 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 24 [2020-09-24 14:56:35,181 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 14:56:35,181 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:56:35,181 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:56:35,182 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 14:56:35,182 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 14:56:35,182 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 14:56:35,182 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-09-24 14:56:35,182 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-09-24 14:56:35,182 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-09-24 14:56:35,183 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-09-24 14:56:35,183 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-24 14:56:35,183 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-09-24 14:56:35,183 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 6 main_~x~0) (<= main_~x~0 6)) [2020-09-24 14:56:35,184 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-09-24 14:56:35,184 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-09-24 14:56:35,184 INFO L268 CegarLoopResult]: For program point L37-2(line 37) no Hoare annotation was computed. [2020-09-24 14:56:35,184 INFO L268 CegarLoopResult]: For program point L37-3(line 37) no Hoare annotation was computed. [2020-09-24 14:56:35,184 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-09-24 14:56:35,184 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2020-09-24 14:56:35,184 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-24 14:56:35,185 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-24 14:56:35,185 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3) .cse0) (and (<= |fibo2_#in~n| 3) (<= 3 fibo2_~n) .cse0) (and .cse0 (<= 6 |fibo2_#in~n|)))) (or (not (<= |fibo2_#in~n| 4)) (and (<= |fibo2_#t~ret2| 1) (<= 1 |fibo2_#t~ret2|)))) [2020-09-24 14:56:35,185 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-09-24 14:56:35,185 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-24 14:56:35,185 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 14:56:35,185 INFO L268 CegarLoopResult]: For program point L23-4(line 23) no Hoare annotation was computed. [2020-09-24 14:56:35,186 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-09-24 14:56:35,186 INFO L268 CegarLoopResult]: For program point L23-5(line 23) no Hoare annotation was computed. [2020-09-24 14:56:35,186 INFO L268 CegarLoopResult]: For program point L23-6(line 23) no Hoare annotation was computed. [2020-09-24 14:56:35,186 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-09-24 14:56:35,186 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-09-24 14:56:35,186 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-09-24 14:56:35,186 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-09-24 14:56:35,187 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-24 14:56:35,187 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-09-24 14:56:35,187 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 5 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 5) .cse0) (and (<= |fibo1_#in~n| 5) .cse0) (and (<= 7 |fibo1_#in~n|) .cse0))) (or (not (<= |fibo1_#in~n| 4)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 |fibo1_#in~n|)))) [2020-09-24 14:56:35,187 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-09-24 14:56:35,187 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-09-24 14:56:35,187 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-09-24 14:56:35,188 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-24 14:56:35,188 INFO L268 CegarLoopResult]: For program point L13-4(line 13) no Hoare annotation was computed. [2020-09-24 14:56:35,188 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-09-24 14:56:35,188 INFO L268 CegarLoopResult]: For program point L13-5(line 13) no Hoare annotation was computed. [2020-09-24 14:56:35,188 INFO L268 CegarLoopResult]: For program point L13-6(line 13) no Hoare annotation was computed. [2020-09-24 14:56:35,188 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-09-24 14:56:35,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:56:35 BoogieIcfgContainer [2020-09-24 14:56:35,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:56:35,198 INFO L168 Benchmark]: Toolchain (without parser) took 23614.17 ms. Allocated memory was 142.6 MB in the beginning and 617.6 MB in the end (delta: 475.0 MB). Free memory was 106.3 MB in the beginning and 310.1 MB in the end (delta: -203.8 MB). Peak memory consumption was 456.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:56:35,198 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-24 14:56:35,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.40 ms. Allocated memory is still 142.6 MB. Free memory was 105.5 MB in the beginning and 96.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:56:35,199 INFO L168 Benchmark]: Boogie Preprocessor took 118.38 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 96.0 MB in the beginning and 183.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:56:35,200 INFO L168 Benchmark]: RCFGBuilder took 356.49 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 169.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:56:35,201 INFO L168 Benchmark]: TraceAbstraction took 22800.85 ms. Allocated memory was 204.5 MB in the beginning and 617.6 MB in the end (delta: 413.1 MB). Free memory was 168.6 MB in the beginning and 310.1 MB in the end (delta: -141.5 MB). Peak memory consumption was 456.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:56:35,203 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.40 ms. Allocated memory is still 142.6 MB. Free memory was 105.5 MB in the beginning and 96.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.38 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 96.0 MB in the beginning and 183.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 356.49 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 169.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22800.85 ms. Allocated memory was 204.5 MB in the beginning and 617.6 MB in the end (delta: 413.1 MB). Free memory was 168.6 MB in the beginning and 310.1 MB in the end (delta: -141.5 MB). Peak memory consumption was 456.5 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, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.0s, OverallIterations: 20, TraceHistogramMax: 28, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1014 SDtfs, 1313 SDslu, 7056 SDs, 0 SdLazy, 5370 SolverSat, 569 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1147 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=304occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 279 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 914 PreInvPairs, 1296 NumberOfFragments, 111 HoareAnnotationTreeSize, 914 FomulaSimplifications, 8348 FormulaSimplificationTreeSizeReduction, 2.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 13571 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 3186 NumberOfCodeBlocks, 3186 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 3166 ConstructedInterpolants, 0 QuantifiedInterpolants, 1468794 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 11132/15515 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...