/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:43:30,923 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 15:43:30,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:43:30,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:43:30,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:43:30,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:43:30,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:43:30,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:43:30,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:43:30,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:43:30,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:43:30,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:43:31,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:43:31,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:43:31,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:43:31,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:43:31,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:43:31,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:43:31,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:43:31,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:43:31,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:43:31,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:43:31,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:43:31,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:43:31,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:43:31,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:43:31,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:43:31,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:43:31,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:43:31,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:43:31,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:43:31,094 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:43:31,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:43:31,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:43:31,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:43:31,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:43:31,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:43:31,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:43:31,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:43:31,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:43:31,098 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:43:31,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:43:31,098 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:43:31,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:43:31,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:43:31,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:43:31,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:43:31,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:43:31,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:43:31,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:43:31,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:43:31,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:43:31,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:43:31,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:43:31,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:43:31,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:43:31,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:43:31,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:43:31,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:43:31,410 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:43:31,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:43:31,412 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:43:31,413 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-21 15:43:31,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/980eaa9fc/aa2f0eb50759419eaf95372f0a180071/FLAG155143494 [2020-08-21 15:43:31,984 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:43:31,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-21 15:43:31,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/980eaa9fc/aa2f0eb50759419eaf95372f0a180071/FLAG155143494 [2020-08-21 15:43:32,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/980eaa9fc/aa2f0eb50759419eaf95372f0a180071 [2020-08-21 15:43:32,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:43:32,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:43:32,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:43:32,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:43:32,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:43:32,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e622eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32, skipping insertion in model container [2020-08-21 15:43:32,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:43:32,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:43:32,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:43:32,613 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:43:32,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:43:32,639 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:43:32,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32 WrapperNode [2020-08-21 15:43:32,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:43:32,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:43:32,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:43:32,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:43:32,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... [2020-08-21 15:43:32,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:43:32,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:43:32,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:43:32,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:43:32,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:43:32,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:43:32,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:43:32,806 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 15:43:32,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:43:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 15:43:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:43:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 15:43:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:43:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:43:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:43:32,966 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:43:32,966 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:43:32,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:43:32 BoogieIcfgContainer [2020-08-21 15:43:32,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:43:32,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:43:32,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:43:32,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:43:32,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:43:32" (1/3) ... [2020-08-21 15:43:32,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180e7218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:43:32, skipping insertion in model container [2020-08-21 15:43:32,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:32" (2/3) ... [2020-08-21 15:43:32,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180e7218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:43:32, skipping insertion in model container [2020-08-21 15:43:32,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:43:32" (3/3) ... [2020-08-21 15:43:32,978 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-08-21 15:43:32,987 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:43:32,993 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:43:33,007 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:43:33,032 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:43:33,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:43:33,033 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:43:33,033 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:43:33,033 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:43:33,034 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:43:33,034 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:43:33,034 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:43:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 15:43:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 15:43:33,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:33,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:33,059 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 15:43:33,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:33,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177395837] [2020-08-21 15:43:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,352 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-08-21 15:43:33,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:43:33,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177395837] [2020-08-21 15:43:33,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:43:33,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:43:33,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608586469] [2020-08-21 15:43:33,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:43:33,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:33,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:43:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:43:33,465 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 15:43:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:33,521 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 15:43:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:43:33,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 15:43:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:33,536 INFO L225 Difference]: With dead ends: 32 [2020-08-21 15:43:33,537 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 15:43:33,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:43:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 15:43:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 15:43:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 15:43:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 15:43:33,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 15:43:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:33,588 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 15:43:33,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:43:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 15:43:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 15:43:33,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:33,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:33,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:43:33,592 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 15:43:33,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:33,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398498147] [2020-08-21 15:43:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 15:43:33,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398498147] [2020-08-21 15:43:33,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:33,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:43:33,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031087406] [2020-08-21 15:43:33,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:43:33,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:43:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:43:33,821 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-21 15:43:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:33,853 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 15:43:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:43:33,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-21 15:43:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:33,855 INFO L225 Difference]: With dead ends: 25 [2020-08-21 15:43:33,855 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 15:43:33,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:43:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 15:43:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 15:43:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 15:43:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 15:43:33,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 15:43:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:33,864 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 15:43:33,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:43:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 15:43:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:43:33,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:33,866 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:33,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:43:33,867 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:33,867 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 15:43:33,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:33,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150099472] [2020-08-21 15:43:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:33,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 15:43:34,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150099472] [2020-08-21 15:43:34,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:34,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:43:34,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488877201] [2020-08-21 15:43:34,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:43:34,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:43:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:43:34,165 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-21 15:43:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:34,208 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 15:43:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:43:34,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-21 15:43:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:34,210 INFO L225 Difference]: With dead ends: 28 [2020-08-21 15:43:34,211 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 15:43:34,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:43:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 15:43:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 15:43:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 15:43:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 15:43:34,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 15:43:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:34,220 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 15:43:34,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:43:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 15:43:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 15:43:34,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:34,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:34,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:43:34,222 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 15:43:34,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:34,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008192480] [2020-08-21 15:43:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 15:43:34,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008192480] [2020-08-21 15:43:34,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:34,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 15:43:34,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155035829] [2020-08-21 15:43:34,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:43:34,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:43:34,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:43:34,496 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-21 15:43:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:34,551 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 15:43:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:43:34,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-21 15:43:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:34,553 INFO L225 Difference]: With dead ends: 31 [2020-08-21 15:43:34,553 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 15:43:34,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:43:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 15:43:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 15:43:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 15:43:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 15:43:34,561 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 15:43:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:34,562 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 15:43:34,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:43:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 15:43:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 15:43:34,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:34,564 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:34,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:43:34,564 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 15:43:34,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:34,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303258615] [2020-08-21 15:43:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 15:43:34,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303258615] [2020-08-21 15:43:34,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:34,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 15:43:34,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343642117] [2020-08-21 15:43:34,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 15:43:34,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 15:43:34,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:43:34,912 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-21 15:43:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:35,000 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 15:43:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 15:43:35,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-21 15:43:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:35,003 INFO L225 Difference]: With dead ends: 34 [2020-08-21 15:43:35,003 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 15:43:35,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:43:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 15:43:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 15:43:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 15:43:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 15:43:35,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 15:43:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:35,017 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 15:43:35,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 15:43:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 15:43:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 15:43:35,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:35,024 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:35,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:43:35,025 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 15:43:35,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:35,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52483137] [2020-08-21 15:43:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 15:43:35,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52483137] [2020-08-21 15:43:35,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:35,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 15:43:35,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145587781] [2020-08-21 15:43:35,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 15:43:35,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:35,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 15:43:35,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:43:35,453 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-21 15:43:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:35,558 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 15:43:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 15:43:35,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-21 15:43:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:35,560 INFO L225 Difference]: With dead ends: 37 [2020-08-21 15:43:35,560 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 15:43:35,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:43:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 15:43:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 15:43:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 15:43:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 15:43:35,567 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 15:43:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:35,567 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 15:43:35,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 15:43:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 15:43:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 15:43:35,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:35,569 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:35,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:43:35,569 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 15:43:35,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:35,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988150364] [2020-08-21 15:43:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 15:43:35,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988150364] [2020-08-21 15:43:35,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:35,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 15:43:35,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880721006] [2020-08-21 15:43:35,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 15:43:35,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 15:43:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 15:43:35,935 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-21 15:43:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:36,053 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 15:43:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 15:43:36,053 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-21 15:43:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:36,055 INFO L225 Difference]: With dead ends: 40 [2020-08-21 15:43:36,055 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 15:43:36,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 15:43:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 15:43:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 15:43:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 15:43:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 15:43:36,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 15:43:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:36,063 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 15:43:36,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 15:43:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 15:43:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 15:43:36,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:36,065 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:36,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:43:36,065 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 15:43:36,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:36,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551731246] [2020-08-21 15:43:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 15:43:36,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551731246] [2020-08-21 15:43:36,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:36,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 15:43:36,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352330108] [2020-08-21 15:43:36,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 15:43:36,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:36,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 15:43:36,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-21 15:43:36,521 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-21 15:43:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:36,660 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 15:43:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 15:43:36,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-21 15:43:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:36,662 INFO L225 Difference]: With dead ends: 43 [2020-08-21 15:43:36,662 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 15:43:36,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-21 15:43:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 15:43:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 15:43:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 15:43:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 15:43:36,669 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 15:43:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:36,670 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 15:43:36,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 15:43:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 15:43:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 15:43:36,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:36,671 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:36,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:43:36,672 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:36,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 15:43:36,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:36,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762816126] [2020-08-21 15:43:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:36,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 15:43:37,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762816126] [2020-08-21 15:43:37,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:37,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 15:43:37,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739437173] [2020-08-21 15:43:37,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 15:43:37,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 15:43:37,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 15:43:37,204 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-21 15:43:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:37,396 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 15:43:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 15:43:37,396 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-21 15:43:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:37,398 INFO L225 Difference]: With dead ends: 46 [2020-08-21 15:43:37,398 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 15:43:37,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 15:43:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 15:43:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 15:43:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 15:43:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 15:43:37,405 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 15:43:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:37,405 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 15:43:37,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 15:43:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 15:43:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 15:43:37,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:37,407 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:37,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:43:37,407 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 15:43:37,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:37,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430474294] [2020-08-21 15:43:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:37,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 15:43:38,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430474294] [2020-08-21 15:43:38,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:38,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 15:43:38,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909897861] [2020-08-21 15:43:38,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 15:43:38,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:38,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 15:43:38,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-21 15:43:38,008 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-21 15:43:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:38,240 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 15:43:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 15:43:38,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-21 15:43:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:38,242 INFO L225 Difference]: With dead ends: 49 [2020-08-21 15:43:38,244 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 15:43:38,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-21 15:43:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 15:43:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 15:43:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 15:43:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 15:43:38,257 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 15:43:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:38,258 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 15:43:38,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 15:43:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 15:43:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 15:43:38,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:38,259 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:38,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:43:38,260 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:38,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 15:43:38,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:38,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044226610] [2020-08-21 15:43:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 15:43:38,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044226610] [2020-08-21 15:43:38,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:38,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 15:43:38,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309490293] [2020-08-21 15:43:38,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 15:43:38,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:38,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 15:43:38,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-21 15:43:38,946 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-21 15:43:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:39,205 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 15:43:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 15:43:39,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 15:43:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:39,207 INFO L225 Difference]: With dead ends: 52 [2020-08-21 15:43:39,207 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 15:43:39,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-21 15:43:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 15:43:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 15:43:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 15:43:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 15:43:39,214 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 15:43:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:39,215 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 15:43:39,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 15:43:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 15:43:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 15:43:39,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:39,216 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:39,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:43:39,217 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 15:43:39,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:39,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029815069] [2020-08-21 15:43:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:39,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 15:43:40,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029815069] [2020-08-21 15:43:40,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:40,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 15:43:40,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423307089] [2020-08-21 15:43:40,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 15:43:40,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:40,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 15:43:40,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-21 15:43:40,134 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-21 15:43:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:40,523 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 15:43:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 15:43:40,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-21 15:43:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:40,525 INFO L225 Difference]: With dead ends: 55 [2020-08-21 15:43:40,525 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 15:43:40,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-21 15:43:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 15:43:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 15:43:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 15:43:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 15:43:40,545 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 15:43:40,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:40,547 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 15:43:40,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 15:43:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 15:43:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 15:43:40,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:40,551 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:40,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:43:40,552 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 15:43:40,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:40,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911963728] [2020-08-21 15:43:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:40,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 15:43:41,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911963728] [2020-08-21 15:43:41,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:41,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 15:43:41,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541857122] [2020-08-21 15:43:41,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 15:43:41,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 15:43:41,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-21 15:43:41,533 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-21 15:43:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:41,860 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 15:43:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 15:43:41,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-21 15:43:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:41,862 INFO L225 Difference]: With dead ends: 58 [2020-08-21 15:43:41,862 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 15:43:41,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-21 15:43:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 15:43:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 15:43:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 15:43:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 15:43:41,877 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 15:43:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:41,877 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 15:43:41,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 15:43:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 15:43:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 15:43:41,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:41,879 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:41,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:43:41,881 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 15:43:41,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:41,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088233214] [2020-08-21 15:43:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:41,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:42,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 15:43:43,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088233214] [2020-08-21 15:43:43,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:43,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 15:43:43,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507976901] [2020-08-21 15:43:43,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 15:43:43,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 15:43:43,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-21 15:43:43,009 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-21 15:43:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:43,372 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 15:43:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 15:43:43,373 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-21 15:43:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:43,374 INFO L225 Difference]: With dead ends: 61 [2020-08-21 15:43:43,374 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 15:43:43,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-21 15:43:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 15:43:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 15:43:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 15:43:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 15:43:43,392 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 15:43:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:43,392 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 15:43:43,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 15:43:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 15:43:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 15:43:43,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:43,394 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:43,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:43:43,394 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 15:43:43,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:43,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346135481] [2020-08-21 15:43:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 15:43:44,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346135481] [2020-08-21 15:43:44,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:44,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-21 15:43:44,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864190073] [2020-08-21 15:43:44,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-21 15:43:44,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-21 15:43:44,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 15:43:44,650 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-21 15:43:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:45,085 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 15:43:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 15:43:45,085 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-21 15:43:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:45,086 INFO L225 Difference]: With dead ends: 64 [2020-08-21 15:43:45,086 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 15:43:45,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 15:43:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 15:43:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 15:43:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 15:43:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 15:43:45,094 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 15:43:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:45,094 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 15:43:45,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-21 15:43:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 15:43:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 15:43:45,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:45,096 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:45,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 15:43:45,096 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 15:43:45,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:45,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461034764] [2020-08-21 15:43:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:45,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:46,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:46,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:46,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 15:43:46,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461034764] [2020-08-21 15:43:46,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:46,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-21 15:43:46,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464133328] [2020-08-21 15:43:46,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-21 15:43:46,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:46,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-21 15:43:46,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 15:43:46,394 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-21 15:43:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:46,876 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 15:43:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-21 15:43:46,877 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-21 15:43:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:46,878 INFO L225 Difference]: With dead ends: 67 [2020-08-21 15:43:46,878 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 15:43:46,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 15:43:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 15:43:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 15:43:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 15:43:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 15:43:46,893 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 15:43:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:46,894 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 15:43:46,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-21 15:43:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 15:43:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 15:43:46,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:46,896 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:46,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 15:43:46,897 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 15:43:46,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:46,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33115333] [2020-08-21 15:43:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:46,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:46,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:47,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 15:43:48,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33115333] [2020-08-21 15:43:48,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:48,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-21 15:43:48,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419406753] [2020-08-21 15:43:48,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-21 15:43:48,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-21 15:43:48,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 15:43:48,220 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-21 15:43:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:48,808 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 15:43:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 15:43:48,811 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-21 15:43:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:48,813 INFO L225 Difference]: With dead ends: 70 [2020-08-21 15:43:48,813 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 15:43:48,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 15:43:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 15:43:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 15:43:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 15:43:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 15:43:48,823 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 15:43:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:48,824 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 15:43:48,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-21 15:43:48,824 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 15:43:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 15:43:48,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:48,827 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:48,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 15:43:48,828 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-21 15:43:48,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:48,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030922615] [2020-08-21 15:43:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:48,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:48,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:48,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:49,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:50,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:50,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:50,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 15:43:50,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030922615] [2020-08-21 15:43:50,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:50,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-21 15:43:50,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137007332] [2020-08-21 15:43:50,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-21 15:43:50,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-21 15:43:50,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 15:43:50,343 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-21 15:43:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:51,013 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 15:43:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-21 15:43:51,013 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-21 15:43:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:51,014 INFO L225 Difference]: With dead ends: 73 [2020-08-21 15:43:51,014 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 15:43:51,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 15:43:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 15:43:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 15:43:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 15:43:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 15:43:51,019 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 15:43:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:51,020 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 15:43:51,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-21 15:43:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 15:43:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 15:43:51,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:51,021 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:51,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 15:43:51,022 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-21 15:43:51,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:51,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261549851] [2020-08-21 15:43:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:51,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 15:43:52,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261549851] [2020-08-21 15:43:52,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:52,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-21 15:43:52,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646104250] [2020-08-21 15:43:52,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-21 15:43:52,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-21 15:43:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 15:43:52,806 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-21 15:43:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:53,523 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 15:43:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-21 15:43:53,524 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-21 15:43:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:53,525 INFO L225 Difference]: With dead ends: 76 [2020-08-21 15:43:53,525 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 15:43:53,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 15:43:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 15:43:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 15:43:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 15:43:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 15:43:53,532 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 15:43:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:53,532 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 15:43:53,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-21 15:43:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 15:43:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 15:43:53,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:53,534 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:53,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 15:43:53,534 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:53,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-21 15:43:53,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:53,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446534158] [2020-08-21 15:43:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:53,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:53,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:53,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:53,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:53,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:54,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:55,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:55,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 15:43:55,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446534158] [2020-08-21 15:43:55,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:55,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-21 15:43:55,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524783931] [2020-08-21 15:43:55,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-21 15:43:55,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-21 15:43:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 15:43:55,429 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-21 15:43:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:56,194 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 15:43:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-21 15:43:56,195 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-21 15:43:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:56,197 INFO L225 Difference]: With dead ends: 79 [2020-08-21 15:43:56,197 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 15:43:56,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 15:43:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 15:43:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 15:43:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 15:43:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 15:43:56,203 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 15:43:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:56,204 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 15:43:56,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-21 15:43:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 15:43:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 15:43:56,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:56,205 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:56,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 15:43:56,206 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:56,206 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-21 15:43:56,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:56,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399194606] [2020-08-21 15:43:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:56,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:57,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:58,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 15:43:58,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399194606] [2020-08-21 15:43:58,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:58,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-21 15:43:58,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8246181] [2020-08-21 15:43:58,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-21 15:43:58,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-21 15:43:58,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 15:43:58,188 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-21 15:43:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:59,085 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 15:43:59,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-21 15:43:59,086 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-21 15:43:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:59,088 INFO L225 Difference]: With dead ends: 82 [2020-08-21 15:43:59,088 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 15:43:59,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 15:43:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 15:43:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 15:43:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 15:43:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 15:43:59,094 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 15:43:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:59,095 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 15:43:59,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-21 15:43:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 15:43:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 15:43:59,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:59,096 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:59,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 15:43:59,097 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-21 15:43:59,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:59,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732102865] [2020-08-21 15:43:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:01,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 15:44:01,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732102865] [2020-08-21 15:44:01,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:44:01,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-21 15:44:01,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630630042] [2020-08-21 15:44:01,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-21 15:44:01,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-21 15:44:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 15:44:01,256 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-08-21 15:44:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:02,214 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-21 15:44:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-21 15:44:02,217 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-08-21 15:44:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:02,218 INFO L225 Difference]: With dead ends: 85 [2020-08-21 15:44:02,218 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 15:44:02,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 15:44:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 15:44:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 15:44:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 15:44:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-21 15:44:02,224 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-21 15:44:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:02,224 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-21 15:44:02,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-21 15:44:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-21 15:44:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 15:44:02,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:02,232 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:02,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 15:44:02,232 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-21 15:44:02,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:02,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71909536] [2020-08-21 15:44:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 15:44:04,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71909536] [2020-08-21 15:44:04,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:44:04,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-21 15:44:04,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384672702] [2020-08-21 15:44:04,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-21 15:44:04,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:04,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-21 15:44:04,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-21 15:44:04,534 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-08-21 15:44:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:05,537 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-21 15:44:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-21 15:44:05,538 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-08-21 15:44:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:05,540 INFO L225 Difference]: With dead ends: 88 [2020-08-21 15:44:05,540 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 15:44:05,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-21 15:44:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 15:44:05,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 15:44:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 15:44:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-21 15:44:05,547 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-21 15:44:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:05,547 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-21 15:44:05,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-21 15:44:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-21 15:44:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 15:44:05,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:05,549 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:05,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 15:44:05,549 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-21 15:44:05,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:05,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236425612] [2020-08-21 15:44:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-21 15:44:08,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236425612] [2020-08-21 15:44:08,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:44:08,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-21 15:44:08,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650485035] [2020-08-21 15:44:08,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-21 15:44:08,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:08,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-21 15:44:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 15:44:08,348 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-08-21 15:44:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:09,511 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-21 15:44:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-21 15:44:09,512 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-08-21 15:44:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:09,514 INFO L225 Difference]: With dead ends: 91 [2020-08-21 15:44:09,514 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 15:44:09,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 15:44:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 15:44:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 15:44:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 15:44:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-21 15:44:09,521 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-21 15:44:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:09,521 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-21 15:44:09,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-21 15:44:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-21 15:44:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 15:44:09,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:09,523 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:09,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 15:44:09,523 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-21 15:44:09,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:09,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234577582] [2020-08-21 15:44:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-21 15:44:12,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234577582] [2020-08-21 15:44:12,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:44:12,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-21 15:44:12,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714267502] [2020-08-21 15:44:12,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-21 15:44:12,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:12,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-21 15:44:12,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-21 15:44:12,195 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-08-21 15:44:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:13,487 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-21 15:44:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-21 15:44:13,489 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-08-21 15:44:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:13,490 INFO L225 Difference]: With dead ends: 94 [2020-08-21 15:44:13,491 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 15:44:13,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-21 15:44:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 15:44:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 15:44:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 15:44:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-21 15:44:13,497 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-21 15:44:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:13,501 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-21 15:44:13,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-21 15:44:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-21 15:44:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-21 15:44:13,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:13,503 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:13,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 15:44:13,503 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:13,503 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-21 15:44:13,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:13,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929166704] [2020-08-21 15:44:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-21 15:44:16,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929166704] [2020-08-21 15:44:16,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:44:16,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-21 15:44:16,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114746210] [2020-08-21 15:44:16,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-21 15:44:16,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-21 15:44:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 15:44:16,334 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-21 15:44:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:17,699 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-21 15:44:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-21 15:44:17,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-21 15:44:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:17,701 INFO L225 Difference]: With dead ends: 97 [2020-08-21 15:44:17,701 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 15:44:17,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 15:44:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 15:44:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-21 15:44:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 15:44:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-21 15:44:17,708 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-21 15:44:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:17,709 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-21 15:44:17,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-21 15:44:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-21 15:44:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-21 15:44:17,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:17,710 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:17,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 15:44:17,710 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-21 15:44:17,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:17,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232942236] [2020-08-21 15:44:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-21 15:44:20,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232942236] [2020-08-21 15:44:20,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:44:20,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-21 15:44:20,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624656667] [2020-08-21 15:44:20,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-21 15:44:20,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-21 15:44:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-21 15:44:20,770 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 57 states. [2020-08-21 15:44:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,231 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-21 15:44:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-21 15:44:22,232 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-08-21 15:44:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,234 INFO L225 Difference]: With dead ends: 100 [2020-08-21 15:44:22,234 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 15:44:22,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-21 15:44:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 15:44:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-21 15:44:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 15:44:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-21 15:44:22,242 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2020-08-21 15:44:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,242 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-21 15:44:22,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-21 15:44:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-21 15:44:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-21 15:44:22,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:22,243 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:22,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 15:44:22,243 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2020-08-21 15:44:22,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:22,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504924854] [2020-08-21 15:44:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:25,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:25,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-08-21 15:44:25,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504924854] [2020-08-21 15:44:25,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:44:25,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-21 15:44:25,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907411264] [2020-08-21 15:44:25,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-21 15:44:25,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-21 15:44:25,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-21 15:44:25,582 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 59 states. [2020-08-21 15:44:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:27,191 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-08-21 15:44:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-21 15:44:27,192 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2020-08-21 15:44:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:27,193 INFO L225 Difference]: With dead ends: 103 [2020-08-21 15:44:27,194 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 15:44:27,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-21 15:44:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 15:44:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-21 15:44:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 15:44:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-21 15:44:27,199 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 175 [2020-08-21 15:44:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:27,200 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-21 15:44:27,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-21 15:44:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-21 15:44:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-21 15:44:27,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:27,202 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:27,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 15:44:27,202 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:27,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1463833859, now seen corresponding path program 28 times [2020-08-21 15:44:27,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:27,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979163955] [2020-08-21 15:44:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:27,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:27,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:27,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:27,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:27,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2