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/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:17:24,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:17:24,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:17:24,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 03:17:24,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 03:17:24,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 03:17:24,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 03:17:24,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 03:17:24,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 03:17:24,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 03:17:24,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 03:17:24,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 03:17:24,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 03:17:24,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 03:17:24,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 03:17:24,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 03:17:24,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 03:17:24,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 03:17:24,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 03:17:24,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 03:17:24,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 03:17:24,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 03:17:24,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 03:17:24,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 03:17:24,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-08 03:17:24,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-08 03:17:24,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-08 03:17:24,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-08 03:17:24,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-08 03:17:24,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-08 03:17:24,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-08 03:17:24,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-08 03:17:24,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-08 03:17:24,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-08 03:17:24,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-08 03:17:24,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-08 03:17:24,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-08 03:17:24,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-08 03:17:24,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:17:24,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:17:24,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:17:24,059 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 [2019-09-08 03:17:24,073 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:17:24,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:17:24,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:17:24,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:17:24,075 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:17:24,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:17:24,075 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:17:24,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:17:24,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:17:24,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:17:24,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:17:24,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:17:24,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:17:24,076 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:17:24,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:17:24,077 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:17:24,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:17:24,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:17:24,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:17:24,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:17:24,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:17:24,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:17:24,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:17:24,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:17:24,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:17:24,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:17:24,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:17:24,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:17:24,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:17:24,107 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:17:24,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:17:24,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:17:24,124 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:17:24,125 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:17:24,125 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2019-09-08 03:17:24,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb4ea742/24a73229249c40538efa395d43d2808c/FLAGbc1d4a7ad [2019-09-08 03:17:24,615 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:17:24,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2019-09-08 03:17:24,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb4ea742/24a73229249c40538efa395d43d2808c/FLAGbc1d4a7ad [2019-09-08 03:17:25,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb4ea742/24a73229249c40538efa395d43d2808c [2019-09-08 03:17:25,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:17:25,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:17:25,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:17:25,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:17:25,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:17:25,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7326b1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25, skipping insertion in model container [2019-09-08 03:17:25,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,040 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:17:25,055 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:17:25,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:17:25,219 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:17:25,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:17:25,257 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:17:25,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25 WrapperNode [2019-09-08 03:17:25,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:17:25,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:17:25,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:17:25,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:17:25,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (1/1) ... [2019-09-08 03:17:25,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:17:25,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:17:25,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:17:25,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:17:25,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (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 [2019-09-08 03:17:25,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:17:25,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:17:25,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 03:17:25,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:17:25,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:17:25,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:17:25,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:17:25,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:17:25,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:17:25,586 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:17:25,586 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 03:17:25,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:17:25 BoogieIcfgContainer [2019-09-08 03:17:25,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:17:25,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:17:25,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:17:25,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:17:25,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:17:25" (1/3) ... [2019-09-08 03:17:25,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ece26af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:17:25, skipping insertion in model container [2019-09-08 03:17:25,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:17:25" (2/3) ... [2019-09-08 03:17:25,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ece26af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:17:25, skipping insertion in model container [2019-09-08 03:17:25,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:17:25" (3/3) ... [2019-09-08 03:17:25,596 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2019-09-08 03:17:25,605 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:17:25,613 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:17:25,630 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:17:25,703 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:17:25,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:17:25,704 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:17:25,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:17:25,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:17:25,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:17:25,705 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:17:25,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:17:25,706 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:17:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-08 03:17:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:17:25,731 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:25,732 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:25,735 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2019-09-08 03:17:25,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:25,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:25,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:25,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:25,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:25,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:17:25,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-08 03:17:25,852 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-08 03:17:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-08 03:17:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:17:25,868 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-08 03:17:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:25,887 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-08 03:17:25,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-08 03:17:25,888 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-08 03:17:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:25,897 INFO L225 Difference]: With dead ends: 32 [2019-09-08 03:17:25,897 INFO L226 Difference]: Without dead ends: 13 [2019-09-08 03:17:25,901 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:17:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-08 03:17:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-08 03:17:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-08 03:17:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-08 03:17:25,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-08 03:17:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:25,940 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-08 03:17:25,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-08 03:17:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-08 03:17:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:17:25,942 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:25,942 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:25,942 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:25,943 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2019-09-08 03:17:25,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:25,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:25,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:25,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:25,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:26,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:17:26,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 03:17:26,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 03:17:26,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 03:17:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:17:26,080 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-09-08 03:17:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:26,108 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-08 03:17:26,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 03:17:26,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-08 03:17:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:26,110 INFO L225 Difference]: With dead ends: 21 [2019-09-08 03:17:26,110 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 03:17:26,111 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:17:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 03:17:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-09-08 03:17:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-08 03:17:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-08 03:17:26,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-08 03:17:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:26,116 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-08 03:17:26,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 03:17:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-08 03:17:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 03:17:26,117 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:26,117 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:26,117 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2019-09-08 03:17:26,118 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:26,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:26,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:26,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:26,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:17:26,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 03:17:26,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 03:17:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 03:17:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:17:26,219 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-09-08 03:17:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:26,240 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-09-08 03:17:26,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 03:17:26,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-08 03:17:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:26,242 INFO L225 Difference]: With dead ends: 24 [2019-09-08 03:17:26,242 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 03:17:26,243 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:17:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 03:17:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-08 03:17:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-08 03:17:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-08 03:17:26,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-09-08 03:17:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:26,249 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-08 03:17:26,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 03:17:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-08 03:17:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 03:17:26,250 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:26,250 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:26,250 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2019-09-08 03:17:26,251 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:26,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:26,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:26,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:26,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:26,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:26,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:26,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-08 03:17:26,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:26,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:26,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-08 03:17:26,506 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 03:17:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 03:17:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:17:26,507 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2019-09-08 03:17:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:26,549 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-08 03:17:26,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-08 03:17:26,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-08 03:17:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:26,551 INFO L225 Difference]: With dead ends: 27 [2019-09-08 03:17:26,551 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 03:17:26,551 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:17:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 03:17:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-09-08 03:17:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 03:17:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-08 03:17:26,556 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-08 03:17:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:26,557 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-08 03:17:26,557 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 03:17:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-08 03:17:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-08 03:17:26,558 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:26,558 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:26,558 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:26,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2019-09-08 03:17:26,559 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:26,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:26,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:26,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:26,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:26,745 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:26,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:17:26,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-08 03:17:26,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:26,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-08 03:17:26,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:26,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:17:26,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:26,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2019-09-08 03:17:26,880 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:17:26,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:17:26,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:17:26,881 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2019-09-08 03:17:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:27,109 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-09-08 03:17:27,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:17:27,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-09-08 03:17:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:27,111 INFO L225 Difference]: With dead ends: 36 [2019-09-08 03:17:27,111 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 03:17:27,112 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:17:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 03:17:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-08 03:17:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 03:17:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-08 03:17:27,120 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2019-09-08 03:17:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:27,121 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-08 03:17:27,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:17:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-08 03:17:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-08 03:17:27,123 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:27,124 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:27,124 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:27,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1682133644, now seen corresponding path program 1 times [2019-09-08 03:17:27,125 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:27,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:27,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:27,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:27,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:27,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:27,275 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:27,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:27,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-08 03:17:27,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:27,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:27,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-08 03:17:27,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 03:17:27,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 03:17:27,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:17:27,342 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-09-08 03:17:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:27,418 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-09-08 03:17:27,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 03:17:27,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-09-08 03:17:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:27,421 INFO L225 Difference]: With dead ends: 36 [2019-09-08 03:17:27,421 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 03:17:27,422 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:17:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 03:17:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-08 03:17:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 03:17:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-09-08 03:17:27,427 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2019-09-08 03:17:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:27,428 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-09-08 03:17:27,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 03:17:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-09-08 03:17:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 03:17:27,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:27,429 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:27,429 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1785237675, now seen corresponding path program 2 times [2019-09-08 03:17:27,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:27,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:27,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:27,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:27,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:27,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:27,538 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:27,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:17:27,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:17:27,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:27,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-08 03:17:27,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:27,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:27,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-08 03:17:27,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 03:17:27,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 03:17:27,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:17:27,606 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2019-09-08 03:17:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:27,709 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-09-08 03:17:27,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 03:17:27,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-09-08 03:17:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:27,711 INFO L225 Difference]: With dead ends: 39 [2019-09-08 03:17:27,711 INFO L226 Difference]: Without dead ends: 31 [2019-09-08 03:17:27,712 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:17:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-08 03:17:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-08 03:17:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 03:17:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-08 03:17:27,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-09-08 03:17:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:27,718 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-08 03:17:27,718 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 03:17:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-08 03:17:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 03:17:27,719 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:27,719 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:27,720 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1839158740, now seen corresponding path program 3 times [2019-09-08 03:17:27,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:27,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:27,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:27,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:27,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:27,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:27,841 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:17:27,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:27,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-08 03:17:27,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:27,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 03:17:27,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:27,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 03:17:27,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:27,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-08 03:17:27,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 03:17:27,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 03:17:27,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:17:27,990 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2019-09-08 03:17:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:28,338 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-09-08 03:17:28,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 03:17:28,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-09-08 03:17:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:28,339 INFO L225 Difference]: With dead ends: 48 [2019-09-08 03:17:28,339 INFO L226 Difference]: Without dead ends: 37 [2019-09-08 03:17:28,340 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:17:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-08 03:17:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-09-08 03:17:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 03:17:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-09-08 03:17:28,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2019-09-08 03:17:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:28,352 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-09-08 03:17:28,352 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 03:17:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-09-08 03:17:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-08 03:17:28,353 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:28,353 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:28,354 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:28,354 INFO L82 PathProgramCache]: Analyzing trace with hash -760785930, now seen corresponding path program 4 times [2019-09-08 03:17:28,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:28,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:28,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:28,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:28,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:28,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:28,536 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:17:28,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:28,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:17:28,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:28,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:17:28,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:28,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:28,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-08 03:17:28,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:17:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:17:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:17:28,606 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2019-09-08 03:17:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:28,742 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-09-08 03:17:28,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:17:28,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-09-08 03:17:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:28,744 INFO L225 Difference]: With dead ends: 51 [2019-09-08 03:17:28,744 INFO L226 Difference]: Without dead ends: 40 [2019-09-08 03:17:28,745 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:17:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-08 03:17:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-08 03:17:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 03:17:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-09-08 03:17:28,760 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2019-09-08 03:17:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:28,761 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-09-08 03:17:28,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:17:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-09-08 03:17:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 03:17:28,762 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:28,762 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:28,762 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:28,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1049709655, now seen corresponding path program 5 times [2019-09-08 03:17:28,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:28,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:28,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:28,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:28,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:28,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:28,895 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:17:28,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:28,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-08 03:17:28,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:28,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-08 03:17:28,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:29,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:29,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-08 03:17:29,019 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:17:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:17:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:17:29,019 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 11 states. [2019-09-08 03:17:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:29,182 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-09-08 03:17:29,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 03:17:29,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-09-08 03:17:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:29,184 INFO L225 Difference]: With dead ends: 54 [2019-09-08 03:17:29,184 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 03:17:29,184 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:17:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 03:17:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-08 03:17:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 03:17:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-09-08 03:17:29,195 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 37 [2019-09-08 03:17:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:29,195 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-09-08 03:17:29,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:17:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-09-08 03:17:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 03:17:29,197 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:29,197 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:29,197 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1324379222, now seen corresponding path program 6 times [2019-09-08 03:17:29,197 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:29,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:29,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:29,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:29,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:29,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:29,397 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:29,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:17:29,453 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 03:17:29,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:29,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:17:29,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:29,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-08 03:17:29,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:29,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-09-08 03:17:29,584 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 03:17:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 03:17:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:17:29,584 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 17 states. [2019-09-08 03:17:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:30,111 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-09-08 03:17:30,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:17:30,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-09-08 03:17:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:30,112 INFO L225 Difference]: With dead ends: 63 [2019-09-08 03:17:30,112 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 03:17:30,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:17:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 03:17:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-08 03:17:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 03:17:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-08 03:17:30,120 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 40 [2019-09-08 03:17:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:30,120 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-08 03:17:30,120 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 03:17:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-08 03:17:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-08 03:17:30,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:30,121 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:30,121 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1062711220, now seen corresponding path program 7 times [2019-09-08 03:17:30,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:30,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:30,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:30,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:30,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:30,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:30,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:17:30,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:30,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 03:17:30,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 03:17:30,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:30,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-09-08 03:17:30,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 03:17:30,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 03:17:30,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:17:30,383 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 13 states. [2019-09-08 03:17:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:30,633 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2019-09-08 03:17:30,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 03:17:30,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-09-08 03:17:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:30,639 INFO L225 Difference]: With dead ends: 69 [2019-09-08 03:17:30,639 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 03:17:30,640 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:17:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 03:17:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-08 03:17:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 03:17:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-09-08 03:17:30,647 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 46 [2019-09-08 03:17:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:30,648 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-09-08 03:17:30,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 03:17:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-09-08 03:17:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-08 03:17:30,649 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:30,649 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:30,649 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1340028948, now seen corresponding path program 8 times [2019-09-08 03:17:30,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:30,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:30,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:30,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:30,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:30,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:30,871 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:30,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:17:30,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:17:30,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:30,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-08 03:17:30,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 03:17:30,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:30,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-09-08 03:17:30,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 03:17:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 03:17:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:17:30,929 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 15 states. [2019-09-08 03:17:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:31,317 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2019-09-08 03:17:31,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 03:17:31,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-09-08 03:17:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:31,318 INFO L225 Difference]: With dead ends: 75 [2019-09-08 03:17:31,318 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 03:17:31,319 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:17:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 03:17:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-09-08 03:17:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 03:17:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-09-08 03:17:31,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 52 [2019-09-08 03:17:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:31,327 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-09-08 03:17:31,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 03:17:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-09-08 03:17:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-08 03:17:31,328 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:31,328 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:31,328 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:31,329 INFO L82 PathProgramCache]: Analyzing trace with hash -990447500, now seen corresponding path program 9 times [2019-09-08 03:17:31,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:31,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:31,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:31,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:31,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 73 proven. 301 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:31,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:31,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:31,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:17:31,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-08 03:17:31,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:31,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-08 03:17:31,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:31,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-08 03:17:31,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:31,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2019-09-08 03:17:31,886 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 03:17:31,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 03:17:31,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:17:31,887 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 24 states. [2019-09-08 03:17:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:33,006 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2019-09-08 03:17:33,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 03:17:33,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2019-09-08 03:17:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:33,007 INFO L225 Difference]: With dead ends: 87 [2019-09-08 03:17:33,007 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 03:17:33,008 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 03:17:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 03:17:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-09-08 03:17:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 03:17:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2019-09-08 03:17:33,015 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 58 [2019-09-08 03:17:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:33,015 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2019-09-08 03:17:33,015 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 03:17:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2019-09-08 03:17:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 03:17:33,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:33,016 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:33,017 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1758268855, now seen corresponding path program 10 times [2019-09-08 03:17:33,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:33,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:33,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:33,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:33,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 88 proven. 442 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:33,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:33,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:33,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:17:33,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:17:33,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:33,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-08 03:17:33,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 172 proven. 345 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 03:17:33,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:17:33,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2019-09-08 03:17:33,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 03:17:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 03:17:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:17:33,439 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 20 states. [2019-09-08 03:17:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:33,993 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2019-09-08 03:17:33,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 03:17:33,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2019-09-08 03:17:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:33,999 INFO L225 Difference]: With dead ends: 96 [2019-09-08 03:17:33,999 INFO L226 Difference]: Without dead ends: 79 [2019-09-08 03:17:34,000 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:17:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-08 03:17:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-09-08 03:17:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 03:17:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2019-09-08 03:17:34,007 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 67 [2019-09-08 03:17:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:34,008 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2019-09-08 03:17:34,008 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 03:17:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2019-09-08 03:17:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-08 03:17:34,009 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:34,010 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:34,010 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1281897002, now seen corresponding path program 11 times [2019-09-08 03:17:34,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:34,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:34,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:34,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:34,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 103 proven. 610 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:17:34,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:17:34,414 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:17:34,425 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:21:40,219 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-08 03:21:40,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:21:44,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-08 03:21:44,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:21:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 205 proven. 495 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:21:45,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:21:45,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2019-09-08 03:21:45,024 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 03:21:45,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 03:21:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:21:45,025 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 23 states. [2019-09-08 03:21:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:21:45,788 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2019-09-08 03:21:45,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 03:21:45,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2019-09-08 03:21:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:21:45,790 INFO L225 Difference]: With dead ends: 105 [2019-09-08 03:21:45,790 INFO L226 Difference]: Without dead ends: 88 [2019-09-08 03:21:45,791 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:21:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-08 03:21:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-09-08 03:21:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 03:21:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2019-09-08 03:21:45,798 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 76 [2019-09-08 03:21:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:21:45,799 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2019-09-08 03:21:45,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 03:21:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2019-09-08 03:21:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 03:21:45,800 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:21:45,800 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 21, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:21:45,800 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:21:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:21:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1781940073, now seen corresponding path program 12 times [2019-09-08 03:21:45,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:21:45,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:21:45,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:45,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:21:45,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:21:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 118 proven. 805 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:21:46,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:21:46,280 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:21:46,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:23:20,634 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-08 03:23:20,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:23:21,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 03:23:21,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:23:21,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:23:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-09-08 03:23:21,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:23:21,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2019-09-08 03:23:21,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 03:23:21,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 03:23:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:23:21,491 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 34 states. [2019-09-08 03:23:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:23:23,821 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2019-09-08 03:23:23,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 03:23:23,821 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 85 [2019-09-08 03:23:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:23:23,823 INFO L225 Difference]: With dead ends: 120 [2019-09-08 03:23:23,823 INFO L226 Difference]: Without dead ends: 100 [2019-09-08 03:23:23,825 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=3302, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 03:23:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-08 03:23:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-09-08 03:23:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-08 03:23:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2019-09-08 03:23:23,832 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 85 [2019-09-08 03:23:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:23:23,832 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2019-09-08 03:23:23,832 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 03:23:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2019-09-08 03:23:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-08 03:23:23,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:23:23,834 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 24, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:23:23,834 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:23:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:23:23,834 INFO L82 PathProgramCache]: Analyzing trace with hash 841571413, now seen corresponding path program 13 times [2019-09-08 03:23:23,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:23:23,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:23:23,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:23,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:23:23,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:23:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 138 proven. 1107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:23:24,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:23:24,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:23:24,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:23:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:23:24,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-08 03:23:24,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:23:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 345 proven. 876 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 03:23:24,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:23:24,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 30 [2019-09-08 03:23:24,518 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 03:23:24,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 03:23:24,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:23:24,520 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand 30 states. [2019-09-08 03:23:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:23:26,000 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2019-09-08 03:23:26,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 03:23:26,001 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2019-09-08 03:23:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:23:26,002 INFO L225 Difference]: With dead ends: 132 [2019-09-08 03:23:26,002 INFO L226 Difference]: Without dead ends: 112 [2019-09-08 03:23:26,003 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:23:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-08 03:23:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-09-08 03:23:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-08 03:23:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2019-09-08 03:23:26,010 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 97 [2019-09-08 03:23:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:23:26,011 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2019-09-08 03:23:26,011 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 03:23:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2019-09-08 03:23:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 03:23:26,012 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:23:26,012 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 28, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:23:26,012 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:23:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:23:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1140270187, now seen corresponding path program 14 times [2019-09-08 03:23:26,013 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:23:26,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:23:26,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:26,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:23:26,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:23:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 158 proven. 1457 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:23:26,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:23:26,808 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:23:26,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:23:26,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:23:26,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:23:26,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-08 03:23:26,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:23:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 401 proven. 1190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (17)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:23:26,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:23:26,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 34 [2019-09-08 03:23:26,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 03:23:26,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 03:23:26,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:23:26,910 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 34 states. [2019-09-08 03:23:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:23:28,829 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2019-09-08 03:23:28,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 03:23:28,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 109 [2019-09-08 03:23:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:23:28,831 INFO L225 Difference]: With dead ends: 144 [2019-09-08 03:23:28,831 INFO L226 Difference]: Without dead ends: 124 [2019-09-08 03:23:28,833 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:23:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-08 03:23:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2019-09-08 03:23:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-09-08 03:23:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2019-09-08 03:23:28,839 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 109 [2019-09-08 03:23:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:23:28,839 INFO L475 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2019-09-08 03:23:28,839 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 03:23:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2019-09-08 03:23:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 03:23:28,841 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:23:28,841 INFO L399 BasicCegarLoop]: trace histogram [37, 37, 32, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:23:28,841 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:23:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:23:28,841 INFO L82 PathProgramCache]: Analyzing trace with hash 274954965, now seen corresponding path program 15 times [2019-09-08 03:23:28,842 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:23:28,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:23:28,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:28,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:23:28,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:23:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 178 proven. 1855 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:23:29,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:23:29,719 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:23:29,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:23:30,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-08 03:23:30,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:23:30,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-08 03:23:30,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:23:30,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:23:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2019-09-08 03:23:30,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:23:30,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2019-09-08 03:23:30,945 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-08 03:23:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-08 03:23:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:23:30,947 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 50 states. [2019-09-08 03:23:38,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:23:38,282 INFO L93 Difference]: Finished difference Result 163 states and 180 transitions. [2019-09-08 03:23:38,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-08 03:23:38,282 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 121 [2019-09-08 03:23:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:23:38,283 INFO L225 Difference]: With dead ends: 163 [2019-09-08 03:23:38,284 INFO L226 Difference]: Without dead ends: 140 [2019-09-08 03:23:38,286 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=359, Invalid=7473, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 03:23:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-08 03:23:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-09-08 03:23:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-08 03:23:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2019-09-08 03:23:38,292 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2019-09-08 03:23:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:23:38,293 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2019-09-08 03:23:38,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-08 03:23:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2019-09-08 03:23:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-08 03:23:38,294 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:23:38,295 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 36, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:23:38,295 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:23:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:23:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1247432490, now seen corresponding path program 16 times [2019-09-08 03:23:38,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:23:38,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:23:38,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:38,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:23:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:23:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 203 proven. 2420 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:23:39,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:23:39,657 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:23:39,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:23:39,706 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:23:39,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:23:39,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 85 conjunts are in the unsatisfiable core [2019-09-08 03:23:39,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:23:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:23:39,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:23:39,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 45 [2019-09-08 03:23:39,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 03:23:39,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 03:23:39,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:23:39,857 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 45 states. [2019-09-08 03:23:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:23:43,205 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2019-09-08 03:23:43,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 03:23:43,206 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 136 [2019-09-08 03:23:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:23:43,208 INFO L225 Difference]: With dead ends: 180 [2019-09-08 03:23:43,208 INFO L226 Difference]: Without dead ends: 157 [2019-09-08 03:23:43,209 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:23:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-08 03:23:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2019-09-08 03:23:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-08 03:23:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2019-09-08 03:23:43,215 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 136 [2019-09-08 03:23:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:23:43,215 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2019-09-08 03:23:43,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 03:23:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2019-09-08 03:23:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-08 03:23:43,217 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:23:43,217 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 42, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:23:43,218 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:23:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:23:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash -307443210, now seen corresponding path program 17 times [2019-09-08 03:23:43,218 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:23:43,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:23:43,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:43,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:23:43,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:23:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:23:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 233 proven. 3197 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 03:23:44,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:23:44,757 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:23:44,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1