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-f4eb214f-m [2019-10-13 17:57:46,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:57:46,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:57:46,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:57:46,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:57:46,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:57:46,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:57:46,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:57:46,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:57:46,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:57:46,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:57:46,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:57:46,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:57:46,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:57:46,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:57:46,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:57:46,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:57:46,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:57:46,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:57:46,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:57:46,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:57:46,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:57:46,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:57:46,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:57:46,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:57:46,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:57:46,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:57:46,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:57:46,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:57:46,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:57:46,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:57:46,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:57:46,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:57:46,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:57:46,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:57:46,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:57:46,216 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 [2019-10-13 17:57:46,231 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:57:46,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:57:46,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:57:46,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:57:46,233 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:57:46,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:57:46,233 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:57:46,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:57:46,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:57:46,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:57:46,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:57:46,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:57:46,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:57:46,235 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:57:46,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:57:46,235 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:57:46,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:57:46,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:57:46,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:57:46,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:57:46,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:57:46,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:57:46,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:57:46,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:57:46,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:57:46,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:57:46,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:57:46,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:57:46,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:57:46,549 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:57:46,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:57:46,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:57:46,567 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:57:46,568 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:57:46,568 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-10-13 17:57:46,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cbf5b9ea/7ed9258246724d3ba5468b7626b2c6ae/FLAG26be4f12a [2019-10-13 17:57:47,245 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:57:47,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-10-13 17:57:47,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cbf5b9ea/7ed9258246724d3ba5468b7626b2c6ae/FLAG26be4f12a [2019-10-13 17:57:47,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cbf5b9ea/7ed9258246724d3ba5468b7626b2c6ae [2019-10-13 17:57:47,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:57:47,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:57:47,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:57:47,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:57:47,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:57:47,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:47" (1/1) ... [2019-10-13 17:57:47,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676b36a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:47, skipping insertion in model container [2019-10-13 17:57:47,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:47" (1/1) ... [2019-10-13 17:57:47,516 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:57:47,565 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:57:48,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:57:48,115 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:57:48,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:57:48,275 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:57:48,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48 WrapperNode [2019-10-13 17:57:48,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:57:48,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:57:48,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:57:48,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:57:48,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (1/1) ... [2019-10-13 17:57:48,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (1/1) ... [2019-10-13 17:57:48,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (1/1) ... [2019-10-13 17:57:48,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (1/1) ... [2019-10-13 17:57:48,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (1/1) ... [2019-10-13 17:57:48,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (1/1) ... [2019-10-13 17:57:48,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (1/1) ... [2019-10-13 17:57:48,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:57:48,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:57:48,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:57:48,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:57:48,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (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 [2019-10-13 17:57:48,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:57:48,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:57:48,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:57:48,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:57:48,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:57:48,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:57:48,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:57:48,486 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:57:48,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:57:48,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:57:48,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:57:49,966 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:57:49,967 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:57:49,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:57:49 BoogieIcfgContainer [2019-10-13 17:57:49,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:57:49,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:57:49,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:57:49,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:57:49,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:57:47" (1/3) ... [2019-10-13 17:57:49,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661cb620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:57:49, skipping insertion in model container [2019-10-13 17:57:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:48" (2/3) ... [2019-10-13 17:57:49,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661cb620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:57:49, skipping insertion in model container [2019-10-13 17:57:49,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:57:49" (3/3) ... [2019-10-13 17:57:49,988 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label12.c [2019-10-13 17:57:50,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:57:50,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:57:50,018 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:57:50,046 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:57:50,046 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:57:50,046 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:57:50,046 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:57:50,047 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:57:50,047 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:57:50,047 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:57:50,047 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:57:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 17:57:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:57:50,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:57:50,080 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:57:50,082 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:57:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:57:50,088 INFO L82 PathProgramCache]: Analyzing trace with hash 242271255, now seen corresponding path program 1 times [2019-10-13 17:57:50,097 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:57:50,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753754563] [2019-10-13 17:57:50,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:50,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:50,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:57:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:57:50,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753754563] [2019-10-13 17:57:50,381 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:57:50,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:57:50,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140580717] [2019-10-13 17:57:50,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:57:50,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:57:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:57:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:57:50,410 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-13 17:57:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:57:52,630 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-10-13 17:57:52,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:57:52,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-13 17:57:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:57:52,651 INFO L225 Difference]: With dead ends: 730 [2019-10-13 17:57:52,651 INFO L226 Difference]: Without dead ends: 447 [2019-10-13 17:57:52,659 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 [2019-10-13 17:57:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-13 17:57:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-13 17:57:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-13 17:57:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 615 transitions. [2019-10-13 17:57:52,749 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 615 transitions. Word has length 18 [2019-10-13 17:57:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:57:52,749 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 615 transitions. [2019-10-13 17:57:52,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:57:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 615 transitions. [2019-10-13 17:57:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 17:57:52,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:57:52,755 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] [2019-10-13 17:57:52,756 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:57:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:57:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash -138419591, now seen corresponding path program 1 times [2019-10-13 17:57:52,757 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:57:52,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630138852] [2019-10-13 17:57:52,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:52,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:52,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:57:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:57:53,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630138852] [2019-10-13 17:57:53,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256418525] [2019-10-13 17:57:53,167 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 [2019-10-13 17:57:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:53,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:57:53,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:57:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:57:53,303 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:57:53,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 17:57:53,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805692039] [2019-10-13 17:57:53,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:57:53,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:57:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:57:53,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:57:53,307 INFO L87 Difference]: Start difference. First operand 443 states and 615 transitions. Second operand 3 states. [2019-10-13 17:57:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:57:53,924 INFO L93 Difference]: Finished difference Result 880 states and 1241 transitions. [2019-10-13 17:57:53,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:57:53,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-13 17:57:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:57:53,933 INFO L225 Difference]: With dead ends: 880 [2019-10-13 17:57:53,934 INFO L226 Difference]: Without dead ends: 878 [2019-10-13 17:57:53,935 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 [2019-10-13 17:57:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2019-10-13 17:57:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2019-10-13 17:57:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-10-13 17:57:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1065 transitions. [2019-10-13 17:57:53,990 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1065 transitions. Word has length 95 [2019-10-13 17:57:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:57:53,991 INFO L462 AbstractCegarLoop]: Abstraction has 733 states and 1065 transitions. [2019-10-13 17:57:53,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:57:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1065 transitions. [2019-10-13 17:57:54,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-13 17:57:54,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:57:54,006 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] [2019-10-13 17:57:54,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:57:54,212 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:57:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:57:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash -427365918, now seen corresponding path program 1 times [2019-10-13 17:57:54,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:57:54,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254824488] [2019-10-13 17:57:54,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:54,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:54,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:57:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:57:55,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254824488] [2019-10-13 17:57:55,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433450224] [2019-10-13 17:57:55,091 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 [2019-10-13 17:57:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:57:55,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:57:55,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:57:55,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:57:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:57:55,393 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:57:55,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-10-13 17:57:55,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144458130] [2019-10-13 17:57:55,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:57:55,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:57:55,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:57:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:57:55,399 INFO L87 Difference]: Start difference. First operand 733 states and 1065 transitions. Second operand 15 states. [2019-10-13 17:58:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:00,596 INFO L93 Difference]: Finished difference Result 2231 states and 3367 transitions. [2019-10-13 17:58:00,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 17:58:00,597 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 207 [2019-10-13 17:58:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:00,611 INFO L225 Difference]: With dead ends: 2231 [2019-10-13 17:58:00,612 INFO L226 Difference]: Without dead ends: 1504 [2019-10-13 17:58:00,616 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 [2019-10-13 17:58:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2019-10-13 17:58:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1345. [2019-10-13 17:58:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-10-13 17:58:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1887 transitions. [2019-10-13 17:58:00,688 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1887 transitions. Word has length 207 [2019-10-13 17:58:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:00,689 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1887 transitions. [2019-10-13 17:58:00,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:58:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1887 transitions. [2019-10-13 17:58:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-13 17:58:00,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:00,700 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] [2019-10-13 17:58:00,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:00,904 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:00,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1883183011, now seen corresponding path program 1 times [2019-10-13 17:58:00,906 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:00,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395554035] [2019-10-13 17:58:00,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:00,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:00,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:01,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395554035] [2019-10-13 17:58:01,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225369788] [2019-10-13 17:58:01,977 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 [2019-10-13 17:58:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:02,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:58:02,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:58:02,157 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:02,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-13 17:58:02,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665296772] [2019-10-13 17:58:02,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:02,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:02,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:58:02,159 INFO L87 Difference]: Start difference. First operand 1345 states and 1887 transitions. Second operand 5 states. [2019-10-13 17:58:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:03,042 INFO L93 Difference]: Finished difference Result 2845 states and 3996 transitions. [2019-10-13 17:58:03,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:03,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-10-13 17:58:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:03,055 INFO L225 Difference]: With dead ends: 2845 [2019-10-13 17:58:03,055 INFO L226 Difference]: Without dead ends: 1510 [2019-10-13 17:58:03,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:58:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2019-10-13 17:58:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1492. [2019-10-13 17:58:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1492 states. [2019-10-13 17:58:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2061 transitions. [2019-10-13 17:58:03,134 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2061 transitions. Word has length 214 [2019-10-13 17:58:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:03,134 INFO L462 AbstractCegarLoop]: Abstraction has 1492 states and 2061 transitions. [2019-10-13 17:58:03,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2061 transitions. [2019-10-13 17:58:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-13 17:58:03,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:03,143 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] [2019-10-13 17:58:03,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:03,356 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash 360281511, now seen corresponding path program 1 times [2019-10-13 17:58:03,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:03,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194228125] [2019-10-13 17:58:03,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:03,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:03,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 22 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:58:03,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194228125] [2019-10-13 17:58:03,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502435529] [2019-10-13 17:58:03,678 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 [2019-10-13 17:58:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:03,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:58:03,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:58:03,995 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:03,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 17:58:03,996 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831653715] [2019-10-13 17:58:03,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:03,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:03,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:03,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:58:03,997 INFO L87 Difference]: Start difference. First operand 1492 states and 2061 transitions. Second operand 5 states. [2019-10-13 17:58:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:04,870 INFO L93 Difference]: Finished difference Result 3469 states and 5113 transitions. [2019-10-13 17:58:04,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:04,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 232 [2019-10-13 17:58:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:04,891 INFO L225 Difference]: With dead ends: 3469 [2019-10-13 17:58:04,891 INFO L226 Difference]: Without dead ends: 2126 [2019-10-13 17:58:04,897 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 [2019-10-13 17:58:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2019-10-13 17:58:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1941. [2019-10-13 17:58:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2019-10-13 17:58:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2509 transitions. [2019-10-13 17:58:04,976 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2509 transitions. Word has length 232 [2019-10-13 17:58:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:04,977 INFO L462 AbstractCegarLoop]: Abstraction has 1941 states and 2509 transitions. [2019-10-13 17:58:04,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2509 transitions. [2019-10-13 17:58:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-10-13 17:58:04,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:04,985 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] [2019-10-13 17:58:05,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:05,189 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1709592415, now seen corresponding path program 1 times [2019-10-13 17:58:05,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:05,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595581849] [2019-10-13 17:58:05,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:05,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:05,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 108 proven. 79 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 17:58:05,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595581849] [2019-10-13 17:58:05,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411424250] [2019-10-13 17:58:05,522 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 [2019-10-13 17:58:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:05,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 252 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:58:05,725 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:05,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-13 17:58:05,725 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639234546] [2019-10-13 17:58:05,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:58:05,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:05,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:58:05,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:58:05,727 INFO L87 Difference]: Start difference. First operand 1941 states and 2509 transitions. Second operand 13 states. [2019-10-13 17:58:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:09,287 INFO L93 Difference]: Finished difference Result 4470 states and 5830 transitions. [2019-10-13 17:58:09,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:58:09,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 293 [2019-10-13 17:58:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:09,298 INFO L225 Difference]: With dead ends: 4470 [2019-10-13 17:58:09,298 INFO L226 Difference]: Without dead ends: 1782 [2019-10-13 17:58:09,306 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 [2019-10-13 17:58:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2019-10-13 17:58:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1345. [2019-10-13 17:58:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-10-13 17:58:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1537 transitions. [2019-10-13 17:58:09,346 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1537 transitions. Word has length 293 [2019-10-13 17:58:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:09,346 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1537 transitions. [2019-10-13 17:58:09,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:58:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1537 transitions. [2019-10-13 17:58:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2019-10-13 17:58:09,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:09,353 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] [2019-10-13 17:58:09,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:09,558 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash 483637657, now seen corresponding path program 1 times [2019-10-13 17:58:09,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:09,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601086860] [2019-10-13 17:58:09,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:09,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:09,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 225 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 17:58:10,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601086860] [2019-10-13 17:58:10,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666958251] [2019-10-13 17:58:10,613 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 [2019-10-13 17:58:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:10,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:58:10,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:10,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:10,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:10,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:10,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:10,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:10,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:10,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:10,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,034 WARN L191 SmtUtils]: Spent 11.18 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-10-13 17:58:22,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:58:22,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:58:22,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:22,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-13 17:58:22,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338674326] [2019-10-13 17:58:22,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:58:22,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:58:22,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:58:22,354 INFO L87 Difference]: Start difference. First operand 1345 states and 1537 transitions. Second operand 21 states.