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/Problem14_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:55,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:55,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:55,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:55,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:55,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:55,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:55,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:55,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:55,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:55,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:55,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:55,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:55,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:55,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:55,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:55,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:55,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:55,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:55,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:55,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:55,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:55,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:55,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:55,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:55,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:55,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:55,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:55,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:55,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:55,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:55,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:55,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:55,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:55,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:55,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:55,697 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 18:02:55,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:55,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:55,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:55,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:55,714 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:55,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:55,714 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:55,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:55,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:55,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:55,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:55,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:55,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:55,715 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:55,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:55,716 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:55,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:55,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:55,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:55,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:55,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:55,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:55,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:55,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:55,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:55,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:55,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:55,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:55,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:56,006 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:56,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:56,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:56,025 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:56,026 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:56,026 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-10-13 18:02:56,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc43c750/e00fdf0b6a2747328f8755da228ca1ad/FLAGd984adcac [2019-10-13 18:02:56,687 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:56,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-10-13 18:02:56,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc43c750/e00fdf0b6a2747328f8755da228ca1ad/FLAGd984adcac [2019-10-13 18:02:56,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc43c750/e00fdf0b6a2747328f8755da228ca1ad [2019-10-13 18:02:56,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:56,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:56,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:56,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:56,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:56,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:56" (1/1) ... [2019-10-13 18:02:56,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a73aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:56, skipping insertion in model container [2019-10-13 18:02:56,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:56" (1/1) ... [2019-10-13 18:02:56,999 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:57,056 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:57,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:57,631 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:57,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:57,838 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:57,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57 WrapperNode [2019-10-13 18:02:57,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:57,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:57,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:57,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:57,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (1/1) ... [2019-10-13 18:02:57,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (1/1) ... [2019-10-13 18:02:57,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (1/1) ... [2019-10-13 18:02:57,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (1/1) ... [2019-10-13 18:02:57,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (1/1) ... [2019-10-13 18:02:57,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (1/1) ... [2019-10-13 18:02:57,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (1/1) ... [2019-10-13 18:02:57,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:57,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:57,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:57,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:57,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (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 18:02:58,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:58,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:58,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:58,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:58,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:58,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:58,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:58,097 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:58,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:58,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:58,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:59,723 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:59,724 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:59,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:59 BoogieIcfgContainer [2019-10-13 18:02:59,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:59,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:59,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:59,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:59,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:56" (1/3) ... [2019-10-13 18:02:59,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755d4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:59, skipping insertion in model container [2019-10-13 18:02:59,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:57" (2/3) ... [2019-10-13 18:02:59,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755d4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:59, skipping insertion in model container [2019-10-13 18:02:59,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:59" (3/3) ... [2019-10-13 18:02:59,734 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label32.c [2019-10-13 18:02:59,744 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:59,752 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:59,764 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:59,792 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:59,792 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:59,792 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:59,792 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:59,793 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:59,793 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:59,793 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:59,793 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 18:02:59,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:59,841 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:59,843 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1416126934, now seen corresponding path program 1 times [2019-10-13 18:02:59,861 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:59,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172810615] [2019-10-13 18:02:59,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:59,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:59,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,366 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 18:03:00,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172810615] [2019-10-13 18:03:00,368 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:00,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:00,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134263025] [2019-10-13 18:03:00,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:00,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:00,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:00,391 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:03,273 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-13 18:03:03,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:03,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-13 18:03:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:03,296 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:03:03,296 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:03,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-13 18:03:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-13 18:03:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-10-13 18:03:03,458 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 61 [2019-10-13 18:03:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:03,459 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-10-13 18:03:03,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-10-13 18:03:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 18:03:03,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:03,478 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:03,479 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:03,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1588363546, now seen corresponding path program 1 times [2019-10-13 18:03:03,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:03,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089925466] [2019-10-13 18:03:03,484 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:03,484 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:03,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:03,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089925466] [2019-10-13 18:03:03,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860070110] [2019-10-13 18:03:03,914 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 18:03:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:04,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:04,161 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:04,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:04,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872611383] [2019-10-13 18:03:04,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:04,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:04,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:04,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:04,167 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-10-13 18:03:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:05,091 INFO L93 Difference]: Finished difference Result 1666 states and 2356 transitions. [2019-10-13 18:03:05,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:05,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-13 18:03:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:05,102 INFO L225 Difference]: With dead ends: 1666 [2019-10-13 18:03:05,102 INFO L226 Difference]: Without dead ends: 1112 [2019-10-13 18:03:05,106 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-13 18:03:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-13 18:03:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-13 18:03:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1475 transitions. [2019-10-13 18:03:05,152 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1475 transitions. Word has length 173 [2019-10-13 18:03:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:05,153 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1475 transitions. [2019-10-13 18:03:05,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1475 transitions. [2019-10-13 18:03:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-13 18:03:05,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:05,157 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 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 18:03:05,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:05,363 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash -718358079, now seen corresponding path program 1 times [2019-10-13 18:03:05,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:05,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076643647] [2019-10-13 18:03:05,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:05,366 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:05,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:05,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076643647] [2019-10-13 18:03:05,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928850728] [2019-10-13 18:03:05,663 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 18:03:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:05,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:05,828 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:05,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:05,829 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213940589] [2019-10-13 18:03:05,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:05,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:05,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:05,830 INFO L87 Difference]: Start difference. First operand 1112 states and 1475 transitions. Second operand 3 states. [2019-10-13 18:03:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:06,757 INFO L93 Difference]: Finished difference Result 3138 states and 4245 transitions. [2019-10-13 18:03:06,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:06,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2019-10-13 18:03:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:06,770 INFO L225 Difference]: With dead ends: 3138 [2019-10-13 18:03:06,770 INFO L226 Difference]: Without dead ends: 2032 [2019-10-13 18:03:06,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-10-13 18:03:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2019-10-13 18:03:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2019-10-13 18:03:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2596 transitions. [2019-10-13 18:03:06,838 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2596 transitions. Word has length 194 [2019-10-13 18:03:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:06,840 INFO L462 AbstractCegarLoop]: Abstraction has 2032 states and 2596 transitions. [2019-10-13 18:03:06,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2596 transitions. [2019-10-13 18:03:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-13 18:03:06,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:06,846 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:07,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:07,053 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:07,054 INFO L82 PathProgramCache]: Analyzing trace with hash -340998247, now seen corresponding path program 1 times [2019-10-13 18:03:07,055 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:07,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449168336] [2019-10-13 18:03:07,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:07,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:07,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 18:03:07,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449168336] [2019-10-13 18:03:07,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803434864] [2019-10-13 18:03:07,485 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 18:03:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:07,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:03:07,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:07,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-10-13 18:03:07,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620831325] [2019-10-13 18:03:07,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:07,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:07,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:07,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:07,703 INFO L87 Difference]: Start difference. First operand 2032 states and 2596 transitions. Second operand 3 states. [2019-10-13 18:03:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:08,724 INFO L93 Difference]: Finished difference Result 4794 states and 6291 transitions. [2019-10-13 18:03:08,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:08,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2019-10-13 18:03:08,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:08,744 INFO L225 Difference]: With dead ends: 4794 [2019-10-13 18:03:08,744 INFO L226 Difference]: Without dead ends: 2768 [2019-10-13 18:03:08,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2019-10-13 18:03:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2586. [2019-10-13 18:03:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2586 states. [2019-10-13 18:03:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 3315 transitions. [2019-10-13 18:03:08,859 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 3315 transitions. Word has length 246 [2019-10-13 18:03:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:08,860 INFO L462 AbstractCegarLoop]: Abstraction has 2586 states and 3315 transitions. [2019-10-13 18:03:08,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 3315 transitions. [2019-10-13 18:03:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-13 18:03:08,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:08,867 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:09,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:09,071 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1720173374, now seen corresponding path program 1 times [2019-10-13 18:03:09,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:09,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526132978] [2019-10-13 18:03:09,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:09,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:09,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:09,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526132978] [2019-10-13 18:03:09,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488377908] [2019-10-13 18:03:09,358 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 18:03:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:09,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:09,574 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:09,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:03:09,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319403253] [2019-10-13 18:03:09,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:03:09,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:09,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:03:09,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:03:09,577 INFO L87 Difference]: Start difference. First operand 2586 states and 3315 transitions. Second operand 11 states. [2019-10-13 18:03:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:14,563 INFO L93 Difference]: Finished difference Result 8486 states and 11872 transitions. [2019-10-13 18:03:14,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:03:14,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 255 [2019-10-13 18:03:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:14,613 INFO L225 Difference]: With dead ends: 8486 [2019-10-13 18:03:14,613 INFO L226 Difference]: Without dead ends: 5340 [2019-10-13 18:03:14,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:03:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2019-10-13 18:03:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 4322. [2019-10-13 18:03:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4322 states. [2019-10-13 18:03:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5567 transitions. [2019-10-13 18:03:14,856 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5567 transitions. Word has length 255 [2019-10-13 18:03:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:14,857 INFO L462 AbstractCegarLoop]: Abstraction has 4322 states and 5567 transitions. [2019-10-13 18:03:14,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:03:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5567 transitions. [2019-10-13 18:03:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-10-13 18:03:14,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:14,874 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:15,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:15,083 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1461339654, now seen corresponding path program 1 times [2019-10-13 18:03:15,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:15,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507075733] [2019-10-13 18:03:15,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:15,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507075733] [2019-10-13 18:03:15,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38501791] [2019-10-13 18:03:15,856 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 18:03:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:15,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:03:16,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:16,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2019-10-13 18:03:16,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546079720] [2019-10-13 18:03:16,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:16,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:16,101 INFO L87 Difference]: Start difference. First operand 4322 states and 5567 transitions. Second operand 3 states. [2019-10-13 18:03:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:17,032 INFO L93 Difference]: Finished difference Result 9408 states and 12511 transitions. [2019-10-13 18:03:17,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:17,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 267 [2019-10-13 18:03:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:17,059 INFO L225 Difference]: With dead ends: 9408 [2019-10-13 18:03:17,060 INFO L226 Difference]: Without dead ends: 5458 [2019-10-13 18:03:17,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 271 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2019-10-13 18:03:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5082. [2019-10-13 18:03:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5082 states. [2019-10-13 18:03:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 6803 transitions. [2019-10-13 18:03:17,246 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 6803 transitions. Word has length 267 [2019-10-13 18:03:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:17,247 INFO L462 AbstractCegarLoop]: Abstraction has 5082 states and 6803 transitions. [2019-10-13 18:03:17,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 6803 transitions. [2019-10-13 18:03:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-10-13 18:03:17,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:17,260 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:17,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:17,475 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1459182395, now seen corresponding path program 1 times [2019-10-13 18:03:17,475 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:17,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695698166] [2019-10-13 18:03:17,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:17,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:17,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 18:03:17,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695698166] [2019-10-13 18:03:17,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145892473] [2019-10-13 18:03:17,725 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 18:03:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:17,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 18:03:17,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:17,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:17,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659007735] [2019-10-13 18:03:17,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:17,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:17,945 INFO L87 Difference]: Start difference. First operand 5082 states and 6803 transitions. Second operand 3 states. [2019-10-13 18:03:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:18,660 INFO L93 Difference]: Finished difference Result 5084 states and 6804 transitions. [2019-10-13 18:03:18,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:18,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 284 [2019-10-13 18:03:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:18,688 INFO L225 Difference]: With dead ends: 5084 [2019-10-13 18:03:18,689 INFO L226 Difference]: Without dead ends: 5082 [2019-10-13 18:03:18,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2019-10-13 18:03:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5082. [2019-10-13 18:03:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5082 states. [2019-10-13 18:03:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 6802 transitions. [2019-10-13 18:03:18,845 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 6802 transitions. Word has length 284 [2019-10-13 18:03:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:18,846 INFO L462 AbstractCegarLoop]: Abstraction has 5082 states and 6802 transitions. [2019-10-13 18:03:18,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 6802 transitions. [2019-10-13 18:03:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-13 18:03:18,861 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:18,862 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:19,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:19,066 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash 754436966, now seen corresponding path program 1 times [2019-10-13 18:03:19,067 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:19,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106935960] [2019-10-13 18:03:19,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 161 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:20,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106935960] [2019-10-13 18:03:20,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001943998] [2019-10-13 18:03:20,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:20,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:20,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 18:03:20,351 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:20,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-13 18:03:20,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903710193] [2019-10-13 18:03:20,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:20,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:20,353 INFO L87 Difference]: Start difference. First operand 5082 states and 6802 transitions. Second operand 5 states. [2019-10-13 18:03:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:21,673 INFO L93 Difference]: Finished difference Result 9824 states and 13302 transitions. [2019-10-13 18:03:21,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:21,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2019-10-13 18:03:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:21,706 INFO L225 Difference]: With dead ends: 9824 [2019-10-13 18:03:21,706 INFO L226 Difference]: Without dead ends: 5106 [2019-10-13 18:03:21,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:03:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5106 states. [2019-10-13 18:03:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5106 to 5098. [2019-10-13 18:03:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5098 states. [2019-10-13 18:03:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 6773 transitions. [2019-10-13 18:03:21,856 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 6773 transitions. Word has length 315 [2019-10-13 18:03:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:21,857 INFO L462 AbstractCegarLoop]: Abstraction has 5098 states and 6773 transitions. [2019-10-13 18:03:21,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 6773 transitions. [2019-10-13 18:03:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2019-10-13 18:03:21,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:21,880 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:22,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:22,095 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:22,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1624153950, now seen corresponding path program 1 times [2019-10-13 18:03:22,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:22,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310307693] [2019-10-13 18:03:22,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:22,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:22,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 162 proven. 130 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-13 18:03:22,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310307693] [2019-10-13 18:03:22,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134560106] [2019-10-13 18:03:22,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:22,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-13 18:03:22,875 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:22,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-13 18:03:22,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505602598] [2019-10-13 18:03:22,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:22,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:22,884 INFO L87 Difference]: Start difference. First operand 5098 states and 6773 transitions. Second operand 5 states. [2019-10-13 18:03:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:24,131 INFO L93 Difference]: Finished difference Result 8518 states and 11450 transitions. [2019-10-13 18:03:24,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:24,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 385 [2019-10-13 18:03:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:24,146 INFO L225 Difference]: With dead ends: 8518 [2019-10-13 18:03:24,147 INFO L226 Difference]: Without dead ends: 3792 [2019-10-13 18:03:24,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 387 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2019-10-13 18:03:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 3726. [2019-10-13 18:03:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3726 states. [2019-10-13 18:03:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 4417 transitions. [2019-10-13 18:03:24,232 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 4417 transitions. Word has length 385 [2019-10-13 18:03:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:24,232 INFO L462 AbstractCegarLoop]: Abstraction has 3726 states and 4417 transitions. [2019-10-13 18:03:24,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 4417 transitions. [2019-10-13 18:03:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-10-13 18:03:24,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:24,245 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2019-10-13 18:03:24,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:24,453 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:24,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1426525150, now seen corresponding path program 1 times [2019-10-13 18:03:24,454 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:24,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434829613] [2019-10-13 18:03:24,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:24,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:24,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 172 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:26,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434829613] [2019-10-13 18:03:26,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277882137] [2019-10-13 18:03:26,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:26,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:26,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 334 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 18:03:27,001 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:27,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:27,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837722372] [2019-10-13 18:03:27,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:27,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:27,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:27,004 INFO L87 Difference]: Start difference. First operand 3726 states and 4417 transitions. Second operand 16 states.