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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:56:44,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:56:44,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:56:44,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:56:44,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:56:44,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:56:44,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:56:44,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:56:44,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:56:44,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:56:44,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:56:44,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:56:44,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:56:44,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:56:44,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:56:44,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:56:44,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:56:44,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:56:45,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:56:45,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:56:45,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:56:45,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:56:45,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:56:45,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:56:45,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:56:45,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:56:45,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:56:45,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:56:45,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:56:45,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:56:45,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:56:45,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:56:45,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:56:45,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:56:45,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:56:45,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:56:45,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:56:45,043 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:56:45,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:56:45,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:56:45,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:56:45,045 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:56:45,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:56:45,046 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:56:45,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:56:45,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:56:45,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:56:45,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:56:45,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:56:45,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:56:45,047 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:56:45,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:56:45,048 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:56:45,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:56:45,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:56:45,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:56:45,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:56:45,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:56:45,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:56:45,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:56:45,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:56:45,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:56:45,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:56:45,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:56:45,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:56:45,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:56:45,343 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:56:45,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:56:45,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:56:45,371 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:56:45,372 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:56:45,372 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-10-14 21:56:45,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ac15fc7/09ea13dc7a43444d8b1175239cefdc9a/FLAG5a84085c5 [2019-10-14 21:56:45,993 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:56:45,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-10-14 21:56:46,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ac15fc7/09ea13dc7a43444d8b1175239cefdc9a/FLAG5a84085c5 [2019-10-14 21:56:46,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ac15fc7/09ea13dc7a43444d8b1175239cefdc9a [2019-10-14 21:56:46,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:56:46,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:56:46,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:46,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:56:46,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:56:46,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:46" (1/1) ... [2019-10-14 21:56:46,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:46, skipping insertion in model container [2019-10-14 21:56:46,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:46" (1/1) ... [2019-10-14 21:56:46,302 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:56:46,349 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:56:46,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:46,901 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:56:47,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:47,053 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:56:47,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47 WrapperNode [2019-10-14 21:56:47,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:47,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:56:47,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:56:47,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:56:47,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:56:47,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:56:47,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:56:47,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:56:47,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-14 21:56:47,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:56:47,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:56:47,235 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:56:47,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:56:47,236 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:56:47,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:56:47,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:56:47,236 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:56:47,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:56:47,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:56:47,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:56:48,501 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:56:48,502 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:56:48,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:48 BoogieIcfgContainer [2019-10-14 21:56:48,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:56:48,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:56:48,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:56:48,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:56:48,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:56:46" (1/3) ... [2019-10-14 21:56:48,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:48, skipping insertion in model container [2019-10-14 21:56:48,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47" (2/3) ... [2019-10-14 21:56:48,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:48, skipping insertion in model container [2019-10-14 21:56:48,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:48" (3/3) ... [2019-10-14 21:56:48,511 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label12.c [2019-10-14 21:56:48,521 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:56:48,529 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:56:48,541 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:56:48,581 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:56:48,582 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:56:48,582 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:56:48,582 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:56:48,582 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:56:48,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:56:48,583 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:56:48,583 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:56:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:56:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:56:48,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:48,626 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:48,628 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash 242271255, now seen corresponding path program 1 times [2019-10-14 21:56:48,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:48,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637226830] [2019-10-14 21:56:48,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:48,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:48,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:49,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637226830] [2019-10-14 21:56:49,009 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:56:49,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:56:49,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721296413] [2019-10-14 21:56:49,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:56:49,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:56:49,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:56:49,037 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:56:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:51,131 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-10-14 21:56:51,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:56:51,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 21:56:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:51,151 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:56:51,151 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:56:51,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:56:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:56:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-14 21:56:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-14 21:56:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 615 transitions. [2019-10-14 21:56:51,257 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 615 transitions. Word has length 18 [2019-10-14 21:56:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:51,258 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 615 transitions. [2019-10-14 21:56:51,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:56:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 615 transitions. [2019-10-14 21:56:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:56:51,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:51,264 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:51,264 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash -138419591, now seen corresponding path program 1 times [2019-10-14 21:56:51,265 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:51,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344844619] [2019-10-14 21:56:51,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:51,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:51,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:56:51,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344844619] [2019-10-14 21:56:51,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998663135] [2019-10-14 21:56:51,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:51,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:56:51,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:56:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:51,815 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:56:51,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-14 21:56:51,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055037317] [2019-10-14 21:56:51,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:56:51,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:56:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:56:51,818 INFO L87 Difference]: Start difference. First operand 443 states and 615 transitions. Second operand 3 states. [2019-10-14 21:56:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:52,475 INFO L93 Difference]: Finished difference Result 880 states and 1241 transitions. [2019-10-14 21:56:52,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:56:52,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-14 21:56:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:52,486 INFO L225 Difference]: With dead ends: 880 [2019-10-14 21:56:52,486 INFO L226 Difference]: Without dead ends: 878 [2019-10-14 21:56:52,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:56:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2019-10-14 21:56:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2019-10-14 21:56:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-10-14 21:56:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1065 transitions. [2019-10-14 21:56:52,543 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1065 transitions. Word has length 95 [2019-10-14 21:56:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:52,543 INFO L462 AbstractCegarLoop]: Abstraction has 733 states and 1065 transitions. [2019-10-14 21:56:52,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:56:52,544 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1065 transitions. [2019-10-14 21:56:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-14 21:56:52,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:52,552 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:52,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:52,756 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash -427365918, now seen corresponding path program 1 times [2019-10-14 21:56:52,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:52,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146318648] [2019-10-14 21:56:52,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:52,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:52,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:56:53,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146318648] [2019-10-14 21:56:53,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896635830] [2019-10-14 21:56:53,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:56:53,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:56:53,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:56:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:53,714 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:56:53,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-10-14 21:56:53,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446811203] [2019-10-14 21:56:53,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:56:53,716 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:56:53,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:56:53,717 INFO L87 Difference]: Start difference. First operand 733 states and 1065 transitions. Second operand 15 states. [2019-10-14 21:56:57,886 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2019-10-14 21:56:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:59,052 INFO L93 Difference]: Finished difference Result 2231 states and 3367 transitions. [2019-10-14 21:56:59,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:56:59,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 207 [2019-10-14 21:56:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:59,070 INFO L225 Difference]: With dead ends: 2231 [2019-10-14 21:56:59,070 INFO L226 Difference]: Without dead ends: 1504 [2019-10-14 21:56:59,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 21:56:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2019-10-14 21:56:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1345. [2019-10-14 21:56:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-10-14 21:56:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1887 transitions. [2019-10-14 21:56:59,150 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1887 transitions. Word has length 207 [2019-10-14 21:56:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:59,151 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1887 transitions. [2019-10-14 21:56:59,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:56:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1887 transitions. [2019-10-14 21:56:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-14 21:56:59,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:59,167 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:59,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:59,372 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1883183011, now seen corresponding path program 1 times [2019-10-14 21:56:59,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:59,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304870482] [2019-10-14 21:56:59,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:59,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:59,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:00,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304870482] [2019-10-14 21:57:00,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26833205] [2019-10-14 21:57:00,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:57:00,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:57:00,722 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:00,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-14 21:57:00,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265840366] [2019-10-14 21:57:00,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:00,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:57:00,724 INFO L87 Difference]: Start difference. First operand 1345 states and 1887 transitions. Second operand 5 states. [2019-10-14 21:57:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:01,632 INFO L93 Difference]: Finished difference Result 2845 states and 3996 transitions. [2019-10-14 21:57:01,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:01,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-10-14 21:57:01,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:01,641 INFO L225 Difference]: With dead ends: 2845 [2019-10-14 21:57:01,642 INFO L226 Difference]: Without dead ends: 1510 [2019-10-14 21:57:01,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:57:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2019-10-14 21:57:01,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1492. [2019-10-14 21:57:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1492 states. [2019-10-14 21:57:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2061 transitions. [2019-10-14 21:57:01,700 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2061 transitions. Word has length 214 [2019-10-14 21:57:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:01,700 INFO L462 AbstractCegarLoop]: Abstraction has 1492 states and 2061 transitions. [2019-10-14 21:57:01,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2061 transitions. [2019-10-14 21:57:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-14 21:57:01,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:01,705 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:01,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:01,915 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:01,916 INFO L82 PathProgramCache]: Analyzing trace with hash 360281511, now seen corresponding path program 1 times [2019-10-14 21:57:01,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:01,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488424578] [2019-10-14 21:57:01,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:01,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:01,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 22 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:57:02,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488424578] [2019-10-14 21:57:02,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112163051] [2019-10-14 21:57:02,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:57:02,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:57:02,446 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:02,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:57:02,448 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332330967] [2019-10-14 21:57:02,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:02,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:02,451 INFO L87 Difference]: Start difference. First operand 1492 states and 2061 transitions. Second operand 5 states. [2019-10-14 21:57:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:03,465 INFO L93 Difference]: Finished difference Result 3469 states and 5113 transitions. [2019-10-14 21:57:03,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:03,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 232 [2019-10-14 21:57:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:03,482 INFO L225 Difference]: With dead ends: 3469 [2019-10-14 21:57:03,483 INFO L226 Difference]: Without dead ends: 2126 [2019-10-14 21:57:03,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2019-10-14 21:57:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1941. [2019-10-14 21:57:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2019-10-14 21:57:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2509 transitions. [2019-10-14 21:57:03,599 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2509 transitions. Word has length 232 [2019-10-14 21:57:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:03,599 INFO L462 AbstractCegarLoop]: Abstraction has 1941 states and 2509 transitions. [2019-10-14 21:57:03,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2509 transitions. [2019-10-14 21:57:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-10-14 21:57:03,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:03,617 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:03,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:03,822 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1709592415, now seen corresponding path program 1 times [2019-10-14 21:57:03,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:03,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469854786] [2019-10-14 21:57:03,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:03,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:03,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 108 proven. 79 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 21:57:04,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469854786] [2019-10-14 21:57:04,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542192648] [2019-10-14 21:57:04,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:04,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 252 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:57:04,528 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:04,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-14 21:57:04,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318031592] [2019-10-14 21:57:04,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:57:04,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:04,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:57:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:57:04,532 INFO L87 Difference]: Start difference. First operand 1941 states and 2509 transitions. Second operand 13 states. [2019-10-14 21:57:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:08,100 INFO L93 Difference]: Finished difference Result 4470 states and 5830 transitions. [2019-10-14 21:57:08,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:57:08,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 293 [2019-10-14 21:57:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:08,114 INFO L225 Difference]: With dead ends: 4470 [2019-10-14 21:57:08,115 INFO L226 Difference]: Without dead ends: 1782 [2019-10-14 21:57:08,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:57:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2019-10-14 21:57:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1345. [2019-10-14 21:57:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-10-14 21:57:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1537 transitions. [2019-10-14 21:57:08,163 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1537 transitions. Word has length 293 [2019-10-14 21:57:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:08,164 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1537 transitions. [2019-10-14 21:57:08,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:57:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1537 transitions. [2019-10-14 21:57:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2019-10-14 21:57:08,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:08,172 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:08,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:08,378 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:08,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash 483637657, now seen corresponding path program 1 times [2019-10-14 21:57:08,379 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:08,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674361879] [2019-10-14 21:57:08,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:08,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:08,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 225 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 21:57:09,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674361879] [2019-10-14 21:57:09,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403486315] [2019-10-14 21:57:09,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:57:09,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:09,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:09,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:09,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:09,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:09,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:09,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:09,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:09,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:20,885 WARN L191 SmtUtils]: Spent 11.29 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-10-14 21:57:20,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:57:21,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:57:21,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:21,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 21:57:21,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97863131] [2019-10-14 21:57:21,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:57:21,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:21,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:57:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:57:21,207 INFO L87 Difference]: Start difference. First operand 1345 states and 1537 transitions. Second operand 21 states.