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/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:01:30,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:01:30,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:01:30,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:01:30,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:01:30,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:01:30,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:01:30,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:01:30,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:01:30,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:01:30,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:01:30,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:01:30,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:01:30,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:01:30,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:01:30,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:01:30,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:01:30,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:01:30,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:01:30,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:01:30,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:01:30,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:01:30,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:01:30,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:01:30,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:01:30,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:01:30,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:01:30,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:01:30,975 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 [2019-09-03 20:01:30,989 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:01:30,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:01:30,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:01:30,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:01:30,991 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:01:30,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:01:30,991 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:01:30,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:01:30,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:01:30,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:01:30,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:01:30,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:01:30,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:01:30,993 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:01:30,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:01:30,993 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:01:30,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:01:30,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:01:30,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:01:30,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:01:30,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:01:30,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:01:30,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:01:30,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:01:30,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:01:30,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:01:30,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:01:30,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:01:30,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:01:31,026 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:01:31,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:01:31,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:01:31,044 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:01:31,044 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:01:31,045 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-03 20:01:31,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb44453d/8a71e0a4b44a4084862c4042e75d728a/FLAGb4b86468d [2019-09-03 20:01:31,551 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:01:31,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-03 20:01:31,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb44453d/8a71e0a4b44a4084862c4042e75d728a/FLAGb4b86468d [2019-09-03 20:01:31,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb44453d/8a71e0a4b44a4084862c4042e75d728a [2019-09-03 20:01:31,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:01:31,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:01:31,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:01:31,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:01:31,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:01:31,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:01:31" (1/1) ... [2019-09-03 20:01:31,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f83d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:31, skipping insertion in model container [2019-09-03 20:01:31,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:01:31" (1/1) ... [2019-09-03 20:01:31,993 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:01:32,008 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:01:32,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:01:32,175 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:01:32,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:01:32,208 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:01:32,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32 WrapperNode [2019-09-03 20:01:32,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:01:32,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:01:32,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:01:32,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:01:32,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (1/1) ... [2019-09-03 20:01:32,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (1/1) ... [2019-09-03 20:01:32,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (1/1) ... [2019-09-03 20:01:32,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (1/1) ... [2019-09-03 20:01:32,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (1/1) ... [2019-09-03 20:01:32,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (1/1) ... [2019-09-03 20:01:32,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (1/1) ... [2019-09-03 20:01:32,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:01:32,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:01:32,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:01:32,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:01:32,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (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 [2019-09-03 20:01:32,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:01:32,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:01:32,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:01:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:01:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:01:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:01:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:01:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:01:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:01:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:01:32,593 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:01:32,593 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-03 20:01:32,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:01:32 BoogieIcfgContainer [2019-09-03 20:01:32,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:01:32,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:01:32,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:01:32,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:01:32,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:01:31" (1/3) ... [2019-09-03 20:01:32,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54945a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:01:32, skipping insertion in model container [2019-09-03 20:01:32,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:01:32" (2/3) ... [2019-09-03 20:01:32,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54945a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:01:32, skipping insertion in model container [2019-09-03 20:01:32,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:01:32" (3/3) ... [2019-09-03 20:01:32,603 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-09-03 20:01:32,616 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:01:32,628 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:01:32,650 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:01:32,683 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:01:32,684 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:01:32,685 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:01:32,685 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:01:32,685 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:01:32,685 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:01:32,685 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:01:32,686 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:01:32,686 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:01:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-03 20:01:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:01:32,711 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:32,712 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:32,714 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-03 20:01:32,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:32,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:32,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:32,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:32,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:32,803 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:32,803 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:32,803 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:32,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:32,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 20:01:32,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:32,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:01:32,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-03 20:01:32,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-03 20:01:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-03 20:01:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-03 20:01:32,929 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-03 20:01:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:33,024 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-03 20:01:33,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:01:33,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-03 20:01:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:33,036 INFO L225 Difference]: With dead ends: 26 [2019-09-03 20:01:33,036 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:01:33,040 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-03 20:01:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:01:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:01:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:01:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-03 20:01:33,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-03 20:01:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:33,073 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-03 20:01:33,073 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-03 20:01:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-03 20:01:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 20:01:33,074 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:33,074 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:33,075 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-03 20:01:33,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:33,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:33,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:33,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,087 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:33,087 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:33,087 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:33,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:33,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:01:33,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:33,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:33,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:33,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 20:01:33,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:01:33,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:01:33,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:01:33,210 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-03 20:01:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:33,269 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-03 20:01:33,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:01:33,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-03 20:01:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:33,270 INFO L225 Difference]: With dead ends: 17 [2019-09-03 20:01:33,271 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 20:01:33,272 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:01:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 20:01:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 20:01:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:01:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-03 20:01:33,277 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-03 20:01:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:33,277 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-03 20:01:33,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:01:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-03 20:01:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:01:33,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:33,278 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:33,279 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:33,279 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-03 20:01:33,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:33,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:33,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:33,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,294 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:33,294 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:33,294 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 (exit command is (exit), workingDir is null) [2019-09-03 20:01:33,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:33,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:01:33,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:33,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:01:33,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:33,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:33,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:33,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 20:01:33,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:01:33,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:01:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:01:33,406 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-09-03 20:01:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:33,465 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-03 20:01:33,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:01:33,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-03 20:01:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:33,467 INFO L225 Difference]: With dead ends: 18 [2019-09-03 20:01:33,467 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 20:01:33,467 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:01:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 20:01:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 20:01:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 20:01:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-03 20:01:33,474 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-03 20:01:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:33,474 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-03 20:01:33,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:01:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-03 20:01:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:01:33,476 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:33,477 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:33,477 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-09-03 20:01:33,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:33,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:33,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:33,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:33,492 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:33,495 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:33,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:01:33,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 20:01:33,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:33,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:01:33,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:33,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:33,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:33,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:01:33,637 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:01:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:01:33,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:01:33,638 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-09-03 20:01:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:33,714 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-03 20:01:33,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:01:33,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-03 20:01:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:33,716 INFO L225 Difference]: With dead ends: 19 [2019-09-03 20:01:33,716 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:01:33,717 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:01:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:01:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:01:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:01:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-03 20:01:33,729 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-03 20:01:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:33,730 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-03 20:01:33,730 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:01:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-03 20:01:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 20:01:33,731 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:33,732 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:33,732 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:33,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:33,734 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-09-03 20:01:33,734 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:33,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:33,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:33,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:33,756 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:33,756 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:33,756 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:33,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:01:33,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:01:33,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:33,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:01:33,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:33,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:33,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:33,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:01:33,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:01:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:01:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:01:33,944 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-09-03 20:01:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:34,015 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-03 20:01:34,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:01:34,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-03 20:01:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:34,016 INFO L225 Difference]: With dead ends: 20 [2019-09-03 20:01:34,016 INFO L226 Difference]: Without dead ends: 17 [2019-09-03 20:01:34,017 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:01:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-03 20:01:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-03 20:01:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-03 20:01:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-03 20:01:34,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-03 20:01:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:34,022 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-03 20:01:34,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:01:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-03 20:01:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:01:34,023 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:34,023 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:34,023 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-09-03 20:01:34,023 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:34,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:34,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:34,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:34,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:34,033 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:34,034 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:34,034 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:34,065 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:01:34,084 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-03 20:01:34,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:34,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 20:01:34,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:34,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:34,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:34,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:01:34,174 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:01:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:01:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:01:34,175 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-09-03 20:01:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:34,312 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-03 20:01:34,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:01:34,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-03 20:01:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:34,313 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:01:34,313 INFO L226 Difference]: Without dead ends: 18 [2019-09-03 20:01:34,314 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:01:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-03 20:01:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-03 20:01:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:01:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-03 20:01:34,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-03 20:01:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:34,318 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-03 20:01:34,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:01:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-03 20:01:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:01:34,319 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:34,320 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:34,320 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-09-03 20:01:34,320 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:34,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:34,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:34,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:34,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:34,332 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:34,332 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:34,332 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:34,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:01:34,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-03 20:01:34,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:34,375 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 20:01:34,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:34,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:34,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:34,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:01:34,504 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:01:34,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:01:34,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:01:34,504 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-03 20:01:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:34,599 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-03 20:01:34,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:01:34,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-03 20:01:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:34,601 INFO L225 Difference]: With dead ends: 22 [2019-09-03 20:01:34,601 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 20:01:34,601 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:01:34,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 20:01:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-03 20:01:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-03 20:01:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-03 20:01:34,608 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-03 20:01:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:34,609 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-03 20:01:34,609 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:01:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-03 20:01:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 20:01:34,610 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:34,611 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:34,611 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-09-03 20:01:34,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:34,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:34,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:34,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:34,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:34,636 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:34,636 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:34,636 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:34,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:34,671 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-03 20:01:34,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:34,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:01:34,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:34,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:01:34,872 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:01:34,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:01:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:01:34,873 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-03 20:01:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:34,979 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-03 20:01:34,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:01:34,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-03 20:01:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:34,981 INFO L225 Difference]: With dead ends: 23 [2019-09-03 20:01:34,981 INFO L226 Difference]: Without dead ends: 20 [2019-09-03 20:01:34,982 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:01:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-03 20:01:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-03 20:01:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 20:01:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-03 20:01:34,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-03 20:01:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:34,991 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-03 20:01:34,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:01:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-03 20:01:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:01:34,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:34,992 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:34,993 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-09-03 20:01:34,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:34,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:34,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:34,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:34,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:35,005 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:35,005 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:35,005 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 (exit command is (exit), workingDir is null) [2019-09-03 20:01:35,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:35,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:01:35,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:35,048 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 20:01:35,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:35,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:35,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:35,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:01:35,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:01:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:01:35,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:01:35,226 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-03 20:01:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:35,387 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-03 20:01:35,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:01:35,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-03 20:01:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:35,390 INFO L225 Difference]: With dead ends: 24 [2019-09-03 20:01:35,390 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 20:01:35,391 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:01:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 20:01:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-03 20:01:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 20:01:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-03 20:01:35,399 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-03 20:01:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:35,400 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-03 20:01:35,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:01:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-03 20:01:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 20:01:35,401 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:35,401 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:35,402 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-09-03 20:01:35,403 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:35,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:35,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:35,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:35,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:35,427 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:35,428 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:35,428 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 (exit command is (exit), workingDir is null) [2019-09-03 20:01:35,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:35,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-03 20:01:35,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:35,483 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 20:01:35,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:35,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:35,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:35,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:01:35,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:01:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:01:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:01:35,650 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-03 20:01:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:35,772 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-03 20:01:35,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:01:35,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-03 20:01:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:35,774 INFO L225 Difference]: With dead ends: 25 [2019-09-03 20:01:35,774 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 20:01:35,774 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:01:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 20:01:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-03 20:01:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-03 20:01:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-03 20:01:35,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-03 20:01:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:35,780 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-03 20:01:35,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:01:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-03 20:01:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 20:01:35,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:35,781 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:35,781 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-09-03 20:01:35,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:35,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:35,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:35,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:35,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:35,791 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:35,791 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:35,791 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:35,808 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:01:35,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:01:35,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:35,927 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 20:01:35,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:36,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:36,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:36,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:01:36,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:01:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:01:36,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:01:36,098 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-03 20:01:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:36,230 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-03 20:01:36,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:01:36,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-03 20:01:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:36,232 INFO L225 Difference]: With dead ends: 26 [2019-09-03 20:01:36,233 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 20:01:36,233 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:01:36,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 20:01:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 20:01:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 20:01:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-03 20:01:36,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-03 20:01:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:36,238 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-03 20:01:36,239 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:01:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-03 20:01:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 20:01:36,239 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:36,239 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:36,240 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-09-03 20:01:36,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:36,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:36,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:36,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:36,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:36,249 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:36,250 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:36,250 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 (exit command is (exit), workingDir is null) [2019-09-03 20:01:36,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:36,290 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-03 20:01:36,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:36,291 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 20:01:36,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:36,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:36,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:36,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:01:36,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:01:36,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:01:36,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:01:36,525 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-03 20:01:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:36,792 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-03 20:01:36,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:01:36,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-03 20:01:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:36,793 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:01:36,794 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 20:01:36,798 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:01:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 20:01:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-03 20:01:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:01:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-03 20:01:36,809 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-03 20:01:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:36,810 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-03 20:01:36,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:01:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-03 20:01:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-03 20:01:36,811 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:36,811 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:36,811 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-09-03 20:01:36,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:36,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:36,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:36,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:36,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:36,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:36,840 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:36,840 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 (exit command is (exit), workingDir is null) [2019-09-03 20:01:36,868 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:36,904 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:01:36,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:36,908 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-03 20:01:36,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:37,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:37,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:37,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:01:37,166 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:01:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:01:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:01:37,167 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-03 20:01:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:37,406 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-03 20:01:37,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:01:37,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-03 20:01:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:37,408 INFO L225 Difference]: With dead ends: 28 [2019-09-03 20:01:37,408 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 20:01:37,409 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:01:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 20:01:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-03 20:01:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 20:01:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-03 20:01:37,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-03 20:01:37,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:37,419 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-03 20:01:37,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:01:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-03 20:01:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:01:37,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:37,425 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:37,426 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:37,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:37,426 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-09-03 20:01:37,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:37,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:37,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:37,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:37,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:37,452 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:37,452 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:37,453 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 (exit command is (exit), workingDir is null) [2019-09-03 20:01:37,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:37,501 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-03 20:01:37,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:37,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:37,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:37,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 20:01:37,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:01:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:01:37,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:01:37,726 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-03 20:01:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:37,946 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-03 20:01:37,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:01:37,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-03 20:01:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:37,948 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:01:37,948 INFO L226 Difference]: Without dead ends: 26 [2019-09-03 20:01:37,948 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:01:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-03 20:01:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-03 20:01:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-03 20:01:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-03 20:01:37,959 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-03 20:01:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:37,959 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-03 20:01:37,959 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:01:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-03 20:01:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 20:01:37,960 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:37,960 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:37,960 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-09-03 20:01:37,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:37,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:37,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:37,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:37,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:37,982 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:37,982 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:37,982 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:38,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:01:38,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:01:38,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:38,031 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-03 20:01:38,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:38,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:38,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:38,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:01:38,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:01:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:01:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:01:38,259 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-03 20:01:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:38,499 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-03 20:01:38,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:01:38,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-03 20:01:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:38,500 INFO L225 Difference]: With dead ends: 30 [2019-09-03 20:01:38,500 INFO L226 Difference]: Without dead ends: 27 [2019-09-03 20:01:38,501 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:01:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-03 20:01:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-03 20:01:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 20:01:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-03 20:01:38,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-03 20:01:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:38,506 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-03 20:01:38,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:01:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-03 20:01:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-03 20:01:38,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:38,507 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:38,507 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-09-03 20:01:38,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:38,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:38,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:38,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:38,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:38,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:38,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:38,517 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:38,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:01:38,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-03 20:01:38,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:38,592 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-03 20:01:38,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:38,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:38,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:38,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:01:38,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:01:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:01:38,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:01:38,846 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-03 20:01:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:39,102 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-03 20:01:39,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:01:39,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-03 20:01:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:39,106 INFO L225 Difference]: With dead ends: 31 [2019-09-03 20:01:39,107 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 20:01:39,107 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:01:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 20:01:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-03 20:01:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-03 20:01:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-03 20:01:39,115 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-03 20:01:39,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:39,116 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-03 20:01:39,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:01:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-03 20:01:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-03 20:01:39,117 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:39,117 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:39,119 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:39,120 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-09-03 20:01:39,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:39,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:39,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:39,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:39,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:39,129 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:39,129 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:39,129 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:39,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:01:39,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:01:39,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:39,267 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-03 20:01:39,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:39,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:39,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:39,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:01:39,581 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:01:39,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:01:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:01:39,582 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-03 20:01:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:39,856 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-03 20:01:39,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:01:39,857 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-03 20:01:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:39,858 INFO L225 Difference]: With dead ends: 32 [2019-09-03 20:01:39,858 INFO L226 Difference]: Without dead ends: 29 [2019-09-03 20:01:39,859 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:01:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-03 20:01:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-03 20:01:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 20:01:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-03 20:01:39,864 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-03 20:01:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:39,864 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-03 20:01:39,864 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:01:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-03 20:01:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:01:39,865 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:39,865 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:39,865 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-09-03 20:01:39,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:39,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:39,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:39,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:39,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:39,874 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:39,874 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:39,875 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:39,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:01:39,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-03 20:01:39,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:39,937 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-03 20:01:39,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:40,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:40,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:40,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:01:40,213 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:01:40,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:01:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:01:40,214 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-09-03 20:01:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:40,547 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-03 20:01:40,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:01:40,547 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-09-03 20:01:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:40,548 INFO L225 Difference]: With dead ends: 33 [2019-09-03 20:01:40,548 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 20:01:40,549 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:01:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 20:01:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-03 20:01:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:01:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-03 20:01:40,554 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-03 20:01:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:40,555 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-03 20:01:40,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:01:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-03 20:01:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-03 20:01:40,555 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:40,555 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:40,556 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:40,556 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-09-03 20:01:40,556 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:40,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:40,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:40,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:40,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:40,565 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:40,565 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:40,565 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:40,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:01:40,625 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-03 20:01:40,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:40,627 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-03 20:01:40,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:40,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:40,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:40,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-03 20:01:40,954 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 20:01:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 20:01:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:01:40,956 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-03 20:01:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:41,308 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-03 20:01:41,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:01:41,309 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-03 20:01:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:41,309 INFO L225 Difference]: With dead ends: 34 [2019-09-03 20:01:41,309 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 20:01:41,310 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:01:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 20:01:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-03 20:01:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 20:01:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-03 20:01:41,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-03 20:01:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:41,316 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-03 20:01:41,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 20:01:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-03 20:01:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-03 20:01:41,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:41,317 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:41,317 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-09-03 20:01:41,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:41,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:41,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:41,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:41,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:41,327 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:41,327 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:41,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:41,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:41,373 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-03 20:01:41,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:41,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:41,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:41,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:01:41,733 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:01:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:01:41,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:01:41,734 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-03 20:01:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:42,136 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-03 20:01:42,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:01:42,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-03 20:01:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:42,137 INFO L225 Difference]: With dead ends: 35 [2019-09-03 20:01:42,137 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 20:01:42,138 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:01:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 20:01:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-03 20:01:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:01:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-03 20:01:42,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-03 20:01:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:42,143 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-03 20:01:42,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:01:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-03 20:01:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:01:42,144 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:42,144 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:42,144 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:42,144 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-09-03 20:01:42,144 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:42,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:42,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:42,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:42,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:42,153 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:42,153 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:42,153 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:42,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:01:42,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:01:42,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:42,212 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-03 20:01:42,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:42,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:42,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:42,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:01:42,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:01:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:01:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:01:42,609 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-03 20:01:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:43,027 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-03 20:01:43,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:01:43,027 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-03 20:01:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:43,028 INFO L225 Difference]: With dead ends: 36 [2019-09-03 20:01:43,028 INFO L226 Difference]: Without dead ends: 33 [2019-09-03 20:01:43,029 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:01:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-03 20:01:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-03 20:01:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 20:01:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-03 20:01:43,038 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-03 20:01:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:43,038 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-03 20:01:43,038 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:01:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-03 20:01:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-03 20:01:43,039 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:43,039 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:43,039 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-09-03 20:01:43,040 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:43,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:43,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:43,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:43,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:43,047 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:43,048 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:43,048 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:43,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:43,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-03 20:01:43,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:43,189 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-03 20:01:43,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:43,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:43,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:43,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:01:43,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:01:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:01:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:01:43,567 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-03 20:01:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:44,014 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-03 20:01:44,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:01:44,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-03 20:01:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:44,017 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:01:44,017 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 20:01:44,017 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:01:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 20:01:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-03 20:01:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-03 20:01:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-03 20:01:44,023 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-03 20:01:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:44,024 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-03 20:01:44,024 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:01:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-03 20:01:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-03 20:01:44,024 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:44,025 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:44,025 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-09-03 20:01:44,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:44,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:44,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:44,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:44,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:44,033 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:44,033 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:44,034 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:44,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:44,229 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:01:44,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:44,231 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-03 20:01:44,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:44,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:44,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:44,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-03 20:01:44,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 20:01:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 20:01:44,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:01:44,636 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-03 20:01:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:45,097 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-03 20:01:45,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 20:01:45,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-03 20:01:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:45,098 INFO L225 Difference]: With dead ends: 38 [2019-09-03 20:01:45,099 INFO L226 Difference]: Without dead ends: 35 [2019-09-03 20:01:45,099 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:01:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-03 20:01:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-03 20:01:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-03 20:01:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-03 20:01:45,105 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-03 20:01:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:45,106 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-03 20:01:45,106 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 20:01:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-03 20:01:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 20:01:45,107 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:45,107 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:45,107 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-09-03 20:01:45,107 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:45,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:45,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:45,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:45,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:45,115 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:45,115 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:45,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:45,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:45,176 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-03 20:01:45,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:45,178 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-03 20:01:45,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:45,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:45,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:45,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-03 20:01:45,613 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:01:45,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:01:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:01:45,614 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-03 20:01:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:46,119 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-03 20:01:46,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 20:01:46,121 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-03 20:01:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:46,122 INFO L225 Difference]: With dead ends: 39 [2019-09-03 20:01:46,122 INFO L226 Difference]: Without dead ends: 36 [2019-09-03 20:01:46,123 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:01:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-03 20:01:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-03 20:01:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 20:01:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-03 20:01:46,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-03 20:01:46,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:46,129 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-03 20:01:46,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:01:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-03 20:01:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 20:01:46,129 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:46,129 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:46,130 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-09-03 20:01:46,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:46,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:46,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:46,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:46,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:46,146 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:46,146 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:46,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:46,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:46,230 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 20:01:46,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:46,232 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-03 20:01:46,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:46,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:46,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:46,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-03 20:01:46,699 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:01:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:01:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:01:46,699 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-03 20:01:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:47,236 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-03 20:01:47,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 20:01:47,236 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-03 20:01:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:47,237 INFO L225 Difference]: With dead ends: 40 [2019-09-03 20:01:47,237 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 20:01:47,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-03 20:01:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 20:01:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-03 20:01:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-03 20:01:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-03 20:01:47,242 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-03 20:01:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:47,242 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-03 20:01:47,242 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:01:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-03 20:01:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-03 20:01:47,243 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:47,243 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:47,243 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-09-03 20:01:47,244 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:47,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:47,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:47,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:47,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:47,252 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:47,252 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:47,252 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:47,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:47,315 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-03 20:01:47,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:47,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:47,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:47,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-03 20:01:47,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-03 20:01:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-03 20:01:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-03 20:01:47,800 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-03 20:01:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:48,355 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-03 20:01:48,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-03 20:01:48,356 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-03 20:01:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:48,357 INFO L225 Difference]: With dead ends: 41 [2019-09-03 20:01:48,357 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:01:48,358 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:01:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:01:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 20:01:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:01:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-03 20:01:48,363 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-03 20:01:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:48,363 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-03 20:01:48,363 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-03 20:01:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-03 20:01:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:01:48,364 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:48,364 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:48,364 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:48,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-09-03 20:01:48,365 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:48,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:48,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:48,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:48,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:48,372 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:48,372 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:48,373 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:48,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:01:48,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:01:48,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:48,445 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-03 20:01:48,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:48,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:48,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:48,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-03 20:01:48,908 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:01:48,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:01:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:01:48,909 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-03 20:01:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:49,521 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-03 20:01:49,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:01:49,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-03 20:01:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:49,522 INFO L225 Difference]: With dead ends: 42 [2019-09-03 20:01:49,523 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 20:01:49,524 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:01:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 20:01:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-03 20:01:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:01:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-03 20:01:49,528 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-03 20:01:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:49,528 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-03 20:01:49,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:01:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-03 20:01:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-03 20:01:49,528 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:49,528 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:49,529 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-09-03 20:01:49,529 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:49,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:49,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:49,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:49,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:49,546 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:49,546 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:49,547 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:49,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:50,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-03 20:01:50,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:50,039 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-03 20:01:50,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:50,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:50,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:50,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-03 20:01:50,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 20:01:50,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 20:01:50,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:01:50,584 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-03 20:01:51,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:51,277 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-03 20:01:51,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 20:01:51,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-03 20:01:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:51,278 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:01:51,278 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 20:01:51,278 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:01:51,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 20:01:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-03 20:01:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-03 20:01:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-03 20:01:51,283 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-03 20:01:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:51,283 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-03 20:01:51,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 20:01:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-03 20:01:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-03 20:01:51,284 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:51,284 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:51,284 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-09-03 20:01:51,285 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:51,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:51,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:51,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:51,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:51,292 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:51,293 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:51,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:51,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:01:51,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:01:51,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:51,533 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-03 20:01:51,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:52,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:52,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:52,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-03 20:01:52,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-03 20:01:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-03 20:01:52,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:01:52,154 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-03 20:01:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:52,892 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-03 20:01:52,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-03 20:01:52,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-03 20:01:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:52,893 INFO L225 Difference]: With dead ends: 44 [2019-09-03 20:01:52,893 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 20:01:52,894 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:01:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 20:01:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-03 20:01:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:01:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-03 20:01:52,900 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-03 20:01:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:52,900 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-03 20:01:52,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-03 20:01:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-03 20:01:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 20:01:52,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:52,901 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:52,901 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-09-03 20:01:52,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:52,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:52,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:52,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:52,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:52,909 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:52,909 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:52,909 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:52,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:01:52,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-03 20:01:52,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:52,977 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-03 20:01:52,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:53,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:53,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:53,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-03 20:01:53,621 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-03 20:01:53,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-03 20:01:53,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:01:53,622 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-03 20:01:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:54,441 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-03 20:01:54,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-03 20:01:54,441 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-03 20:01:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:54,442 INFO L225 Difference]: With dead ends: 45 [2019-09-03 20:01:54,442 INFO L226 Difference]: Without dead ends: 42 [2019-09-03 20:01:54,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:01:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-03 20:01:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-03 20:01:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 20:01:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-03 20:01:54,448 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-03 20:01:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:54,448 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-03 20:01:54,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-03 20:01:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-03 20:01:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-03 20:01:54,449 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:54,449 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:54,449 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-09-03 20:01:54,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:54,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:54,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:54,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:54,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:54,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:54,458 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:54,458 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:54,486 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:01:54,617 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-03 20:01:54,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:54,628 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-03 20:01:54,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:55,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:55,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:55,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-03 20:01:55,287 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 20:01:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 20:01:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:01:55,288 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-03 20:01:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:56,121 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-03 20:01:56,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 20:01:56,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-03 20:01:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:56,122 INFO L225 Difference]: With dead ends: 46 [2019-09-03 20:01:56,122 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 20:01:56,123 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 20:01:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 20:01:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-03 20:01:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-03 20:01:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-03 20:01:56,129 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-03 20:01:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:56,130 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-03 20:01:56,130 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 20:01:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-03 20:01:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-03 20:01:56,130 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:56,130 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:56,131 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-09-03 20:01:56,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:56,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:56,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:56,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:56,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:56,138 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:56,139 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:56,139 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:56,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:56,218 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-03 20:01:56,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:56,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:56,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:56,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-03 20:01:56,845 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 20:01:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 20:01:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 20:01:56,846 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-03 20:01:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:57,692 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-03 20:01:57,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-03 20:01:57,692 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-03 20:01:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:57,693 INFO L225 Difference]: With dead ends: 47 [2019-09-03 20:01:57,693 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 20:01:57,694 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:01:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 20:01:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-03 20:01:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 20:01:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-03 20:01:57,699 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-03 20:01:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:57,699 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-03 20:01:57,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 20:01:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-03 20:01:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 20:01:57,700 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:57,700 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:57,700 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-09-03 20:01:57,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:57,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:57,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:01:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:57,708 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:57,709 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:57,709 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:57,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:01:57,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:01:57,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:57,771 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-03 20:01:57,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:58,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:58,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:58,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-03 20:01:58,445 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 20:01:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 20:01:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:01:58,446 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-03 20:01:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:59,327 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-03 20:01:59,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 20:01:59,328 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-03 20:01:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:59,329 INFO L225 Difference]: With dead ends: 48 [2019-09-03 20:01:59,329 INFO L226 Difference]: Without dead ends: 45 [2019-09-03 20:01:59,330 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:01:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-03 20:01:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-03 20:01:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 20:01:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-03 20:01:59,334 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-03 20:01:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:59,335 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-03 20:01:59,335 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 20:01:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-03 20:01:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 20:01:59,335 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:59,335 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:59,336 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-09-03 20:01:59,336 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:59,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:59,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:59,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:59,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:59,343 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:59,343 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:59,343 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:59,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:00,372 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-03 20:02:00,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:00,375 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-03 20:02:00,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:01,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:01,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:01,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-03 20:02:01,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-03 20:02:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-03 20:02:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:02:01,089 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-03 20:02:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:02,046 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-03 20:02:02,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-03 20:02:02,047 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-03 20:02:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:02,047 INFO L225 Difference]: With dead ends: 49 [2019-09-03 20:02:02,047 INFO L226 Difference]: Without dead ends: 46 [2019-09-03 20:02:02,048 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:02:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-03 20:02:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-03 20:02:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-03 20:02:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-03 20:02:02,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-03 20:02:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:02,053 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-03 20:02:02,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-03 20:02:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-03 20:02:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-03 20:02:02,054 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:02,054 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:02,054 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-09-03 20:02:02,054 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:02,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:02,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:02,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:02,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:02,062 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:02,062 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:02,063 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:02,086 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:02,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:02,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:02,464 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-03 20:02:02,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:03,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:02:03,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:03,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-03 20:02:03,239 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-03 20:02:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-03 20:02:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:02:03,240 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-03 20:02:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:04,266 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-03 20:02:04,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-03 20:02:04,266 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-03 20:02:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:04,267 INFO L225 Difference]: With dead ends: 50 [2019-09-03 20:02:04,267 INFO L226 Difference]: Without dead ends: 47 [2019-09-03 20:02:04,268 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:02:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-03 20:02:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-03 20:02:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 20:02:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-03 20:02:04,271 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-03 20:02:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:04,271 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-03 20:02:04,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-03 20:02:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-03 20:02:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 20:02:04,272 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:04,272 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:04,272 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-09-03 20:02:04,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:04,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:04,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:04,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:04,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:04,282 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:04,282 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:04,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:04,295 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:04,356 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-03 20:02:04,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:04,359 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-03 20:02:04,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:05,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:05,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:05,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-03 20:02:05,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-03 20:02:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-03 20:02:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:02:05,160 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-03 20:02:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:06,252 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-03 20:02:06,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-03 20:02:06,252 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-03 20:02:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:06,253 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:02:06,253 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 20:02:06,253 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:02:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 20:02:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-03 20:02:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:02:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-03 20:02:06,258 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-03 20:02:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:06,258 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-03 20:02:06,258 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-03 20:02:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-03 20:02:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-03 20:02:06,258 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:06,259 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:06,259 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:06,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-09-03 20:02:06,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:06,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:06,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:06,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:06,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:06,267 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:06,267 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:06,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:06,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:02:06,485 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 20:02:06,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:06,488 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-03 20:02:06,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:07,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:07,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:07,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-03 20:02:07,303 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-03 20:02:07,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-03 20:02:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:02:07,304 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-03 20:02:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:08,381 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-03 20:02:08,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-03 20:02:08,381 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-03 20:02:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:08,382 INFO L225 Difference]: With dead ends: 52 [2019-09-03 20:02:08,382 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 20:02:08,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 20:02:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 20:02:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-03 20:02:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-03 20:02:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-03 20:02:08,388 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-03 20:02:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:08,388 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-03 20:02:08,388 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-03 20:02:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-03 20:02:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-03 20:02:08,390 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:08,390 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:08,390 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-09-03 20:02:08,391 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:08,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:08,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:08,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:08,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:08,400 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:08,400 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:08,400 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:08,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:08,469 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-03 20:02:08,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:09,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:09,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:09,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-03 20:02:09,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-03 20:02:09,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-03 20:02:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 20:02:09,828 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-03 20:02:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:10,905 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-03 20:02:10,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-03 20:02:10,906 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-03 20:02:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:10,907 INFO L225 Difference]: With dead ends: 53 [2019-09-03 20:02:10,907 INFO L226 Difference]: Without dead ends: 50 [2019-09-03 20:02:10,909 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:02:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-03 20:02:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-03 20:02:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 20:02:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-03 20:02:10,914 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-03 20:02:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:10,914 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-03 20:02:10,914 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-03 20:02:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-03 20:02:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 20:02:10,914 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:10,914 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:10,915 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-09-03 20:02:10,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:10,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:10,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:10,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:10,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:10,922 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:10,923 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:10,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:10,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:02:10,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:10,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:11,002 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-03 20:02:11,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:11,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:11,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:11,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-03 20:02:11,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-03 20:02:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-03 20:02:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:02:11,918 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-03 20:02:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:13,208 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-03 20:02:13,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-03 20:02:13,208 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-03 20:02:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:13,208 INFO L225 Difference]: With dead ends: 54 [2019-09-03 20:02:13,208 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:02:13,209 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 20:02:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:02:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-03 20:02:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 20:02:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-03 20:02:13,215 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-03 20:02:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:13,215 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-03 20:02:13,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-03 20:02:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-03 20:02:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-03 20:02:13,215 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:13,215 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:13,216 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:13,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-09-03 20:02:13,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:13,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:13,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:13,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:13,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:13,223 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:13,224 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:13,224 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:13,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:02:14,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-03 20:02:14,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:14,562 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-03 20:02:14,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:15,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:15,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:15,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-03 20:02:15,530 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-03 20:02:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-03 20:02:15,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 20:02:15,532 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-03 20:02:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:16,861 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-03 20:02:16,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-03 20:02:16,861 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-03 20:02:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:16,862 INFO L225 Difference]: With dead ends: 55 [2019-09-03 20:02:16,862 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 20:02:16,863 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 20:02:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 20:02:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-03 20:02:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-03 20:02:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-03 20:02:16,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-03 20:02:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:16,868 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-03 20:02:16,869 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-03 20:02:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-03 20:02:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 20:02:16,869 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:16,869 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:16,869 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-09-03 20:02:16,870 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:16,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:16,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:16,877 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:16,878 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:16,878 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:16,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:02:17,227 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:17,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:17,230 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-03 20:02:17,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:18,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:18,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:18,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-03 20:02:18,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-03 20:02:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-03 20:02:18,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 20:02:18,259 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-03 20:02:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:19,572 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-03 20:02:19,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-03 20:02:19,573 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-03 20:02:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:19,574 INFO L225 Difference]: With dead ends: 56 [2019-09-03 20:02:19,574 INFO L226 Difference]: Without dead ends: 53 [2019-09-03 20:02:19,576 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:02:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-03 20:02:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-03 20:02:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-03 20:02:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-03 20:02:19,581 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-03 20:02:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:19,581 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-03 20:02:19,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-03 20:02:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-03 20:02:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 20:02:19,582 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:19,582 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:19,582 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-09-03 20:02:19,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:19,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:19,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:19,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:19,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:19,589 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:19,589 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:19,589 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:19,598 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:02:19,684 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-03 20:02:19,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:19,687 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-03 20:02:19,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:20,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:20,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:20,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-03 20:02:20,713 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-03 20:02:20,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-03 20:02:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:02:20,714 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-03 20:02:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:22,085 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-03 20:02:22,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-03 20:02:22,086 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-03 20:02:22,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:22,087 INFO L225 Difference]: With dead ends: 57 [2019-09-03 20:02:22,087 INFO L226 Difference]: Without dead ends: 54 [2019-09-03 20:02:22,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 20:02:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-03 20:02:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-03 20:02:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-03 20:02:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-03 20:02:22,093 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-03 20:02:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:22,093 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-03 20:02:22,093 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-03 20:02:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-03 20:02:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-03 20:02:22,094 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:22,094 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:22,094 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:22,094 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-09-03 20:02:22,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:22,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:22,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:22,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:22,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:22,101 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:22,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:22,101 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:22,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:02:22,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-03 20:02:22,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:22,578 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-03 20:02:22,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:23,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:23,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:23,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-03 20:02:23,648 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-03 20:02:23,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-03 20:02:23,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 20:02:23,649 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-03 20:02:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:25,093 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-03 20:02:25,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-03 20:02:25,093 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-03 20:02:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:25,094 INFO L225 Difference]: With dead ends: 58 [2019-09-03 20:02:25,094 INFO L226 Difference]: Without dead ends: 55 [2019-09-03 20:02:25,095 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 20:02:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-03 20:02:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-03 20:02:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-03 20:02:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-03 20:02:25,101 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-03 20:02:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:25,101 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-03 20:02:25,102 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-03 20:02:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-03 20:02:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-03 20:02:25,102 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:25,102 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:25,102 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-09-03 20:02:25,103 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:25,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:25,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:25,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:25,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:25,111 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:25,111 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:25,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:25,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:25,228 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-03 20:02:25,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:26,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:26,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:26,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-03 20:02:26,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-03 20:02:26,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-03 20:02:26,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 20:02:26,351 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-03 20:02:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:27,926 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-03 20:02:27,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-03 20:02:27,926 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-03 20:02:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:27,927 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:02:27,927 INFO L226 Difference]: Without dead ends: 56 [2019-09-03 20:02:27,927 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-09-03 20:02:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-03 20:02:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-03 20:02:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 20:02:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-03 20:02:27,932 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-03 20:02:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:27,932 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-03 20:02:27,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-03 20:02:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-03 20:02:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-03 20:02:27,933 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:27,933 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:27,933 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:27,933 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-09-03 20:02:27,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:27,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:27,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:27,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:27,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:27,940 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:27,941 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:27,941 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:27,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:02:28,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:28,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:28,035 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-03 20:02:28,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:29,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:29,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:29,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-03 20:02:29,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-03 20:02:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-03 20:02:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-03 20:02:29,367 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-03 20:02:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:30,960 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-03 20:02:30,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-03 20:02:30,960 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-03 20:02:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:30,961 INFO L225 Difference]: With dead ends: 60 [2019-09-03 20:02:30,961 INFO L226 Difference]: Without dead ends: 57 [2019-09-03 20:02:30,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 20:02:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-03 20:02:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-03 20:02:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-03 20:02:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-03 20:02:30,968 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-03 20:02:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:30,968 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-03 20:02:30,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-03 20:02:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-03 20:02:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-03 20:02:30,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:30,969 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:30,969 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-09-03 20:02:30,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:30,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:30,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:30,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:30,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:30,977 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:30,977 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:30,977 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:30,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:02:33,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-03 20:02:33,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:33,385 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-03 20:02:33,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:34,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:34,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:34,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-03 20:02:34,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-03 20:02:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-03 20:02:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 20:02:34,563 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-03 20:02:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:36,252 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-03 20:02:36,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-03 20:02:36,252 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-03 20:02:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:36,253 INFO L225 Difference]: With dead ends: 61 [2019-09-03 20:02:36,253 INFO L226 Difference]: Without dead ends: 58 [2019-09-03 20:02:36,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 20:02:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-03 20:02:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-03 20:02:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-03 20:02:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-03 20:02:36,259 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-03 20:02:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:36,259 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-03 20:02:36,259 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-03 20:02:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-03 20:02:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-03 20:02:36,260 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:36,260 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:36,260 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-09-03 20:02:36,261 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:36,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:36,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:36,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:36,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:36,269 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:36,269 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:36,269 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:36,286 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:36,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:36,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:36,714 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-03 20:02:36,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:37,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:37,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:37,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-03 20:02:37,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-03 20:02:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-03 20:02:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 20:02:37,929 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-03 20:02:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:39,618 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-03 20:02:39,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-03 20:02:39,618 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-03 20:02:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:39,619 INFO L225 Difference]: With dead ends: 62 [2019-09-03 20:02:39,619 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 20:02:39,620 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-09-03 20:02:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 20:02:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-03 20:02:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 20:02:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-03 20:02:39,626 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-03 20:02:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:39,626 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-03 20:02:39,626 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-03 20:02:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-03 20:02:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 20:02:39,626 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:39,627 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:39,627 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-09-03 20:02:39,627 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:39,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:39,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:39,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:39,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:39,635 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:39,635 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:39,635 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:39,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:02:39,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-03 20:02:39,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:39,762 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-03 20:02:39,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:41,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:41,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:41,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-03 20:02:41,094 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-03 20:02:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-03 20:02:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-03 20:02:41,095 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-03 20:02:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:42,862 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-03 20:02:42,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-03 20:02:42,862 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-03 20:02:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:42,863 INFO L225 Difference]: With dead ends: 63 [2019-09-03 20:02:42,863 INFO L226 Difference]: Without dead ends: 60 [2019-09-03 20:02:42,864 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 20:02:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-03 20:02:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-03 20:02:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:02:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-03 20:02:42,870 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-03 20:02:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:42,871 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-03 20:02:42,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-03 20:02:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-03 20:02:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-03 20:02:42,872 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:42,872 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:42,872 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-09-03 20:02:42,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:42,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:42,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:42,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:42,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:42,880 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:42,880 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:42,881 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:42,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:02:43,533 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-03 20:02:43,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:43,538 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-03 20:02:43,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:44,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:44,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:44,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-03 20:02:44,847 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-03 20:02:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-03 20:02:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 20:02:44,848 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-03 20:02:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:46,625 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-03 20:02:46,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-03 20:02:46,629 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-03 20:02:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:46,629 INFO L225 Difference]: With dead ends: 64 [2019-09-03 20:02:46,630 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 20:02:46,630 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-09-03 20:02:46,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 20:02:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-03 20:02:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-03 20:02:46,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-03 20:02:46,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-03 20:02:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:46,637 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-03 20:02:46,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-03 20:02:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-03 20:02:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-03 20:02:46,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:46,638 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:46,638 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-09-03 20:02:46,638 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:46,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:46,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:46,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:46,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:46,645 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:46,645 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:46,645 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:46,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:46,826 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-03 20:02:46,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:48,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:48,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:48,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-03 20:02:48,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-03 20:02:48,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-03 20:02:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-03 20:02:48,295 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-03 20:02:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:50,304 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-03 20:02:50,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-03 20:02:50,304 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-03 20:02:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:50,305 INFO L225 Difference]: With dead ends: 65 [2019-09-03 20:02:50,305 INFO L226 Difference]: Without dead ends: 62 [2019-09-03 20:02:50,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-09-03 20:02:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-03 20:02:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-03 20:02:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-03 20:02:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-03 20:02:50,312 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-03 20:02:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:50,312 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-03 20:02:50,312 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-03 20:02:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-03 20:02:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-03 20:02:50,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:50,313 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:50,313 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-09-03 20:02:50,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:50,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:50,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:50,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:50,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:50,321 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:50,322 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:50,322 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:50,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:02:50,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:50,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:50,442 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-03 20:02:50,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:51,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:51,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:51,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-03 20:02:51,867 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-03 20:02:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-03 20:02:51,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-03 20:02:51,868 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-03 20:02:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:53,807 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-03 20:02:53,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-03 20:02:53,808 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-03 20:02:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:53,809 INFO L225 Difference]: With dead ends: 66 [2019-09-03 20:02:53,809 INFO L226 Difference]: Without dead ends: 63 [2019-09-03 20:02:53,810 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-03 20:02:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-03 20:02:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-03 20:02:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-03 20:02:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-03 20:02:53,816 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-03 20:02:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:53,817 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-03 20:02:53,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-03 20:02:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-03 20:02:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-03 20:02:53,817 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:53,817 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:53,818 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:53,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-09-03 20:02:53,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:53,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:53,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:53,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:53,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:53,826 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:53,827 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:53,827 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:53,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:57,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-03 20:02:57,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:57,950 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-03 20:02:57,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:59,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:59,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:59,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-03 20:02:59,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-03 20:02:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-03 20:02:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-03 20:02:59,441 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-03 20:03:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:01,487 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-03 20:03:01,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-03 20:03:01,488 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-03 20:03:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:01,489 INFO L225 Difference]: With dead ends: 67 [2019-09-03 20:03:01,489 INFO L226 Difference]: Without dead ends: 64 [2019-09-03 20:03:01,490 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-09-03 20:03:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-03 20:03:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-03 20:03:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-03 20:03:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-03 20:03:01,497 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-03 20:03:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:01,497 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-03 20:03:01,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-03 20:03:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-03 20:03:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-03 20:03:01,498 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:01,498 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:01,498 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-09-03 20:03:01,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:01,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:01,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:01,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:01,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:01,505 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:01,505 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:01,505 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:01,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:03:02,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:03:02,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:02,115 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-03 20:03:02,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:03,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:03,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:03,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-03 20:03:03,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-03 20:03:03,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-03 20:03:03,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-03 20:03:03,638 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-03 20:03:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:05,790 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-03 20:03:05,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-03 20:03:05,790 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-03 20:03:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:05,791 INFO L225 Difference]: With dead ends: 68 [2019-09-03 20:03:05,791 INFO L226 Difference]: Without dead ends: 65 [2019-09-03 20:03:05,791 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-09-03 20:03:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-03 20:03:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-03 20:03:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-03 20:03:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-03 20:03:05,797 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-03 20:03:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:05,797 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-03 20:03:05,797 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-03 20:03:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-03 20:03:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-03 20:03:05,798 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:05,798 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:05,798 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-09-03 20:03:05,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:05,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:05,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:05,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:05,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:05,807 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:05,807 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:05,807 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:03:05,827 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:05,976 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-03 20:03:05,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:05,981 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-03 20:03:05,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:07,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:07,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:07,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-03 20:03:07,556 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-03 20:03:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-03 20:03:07,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-03 20:03:07,557 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-03 20:03:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:09,793 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-03 20:03:09,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-03 20:03:09,793 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-03 20:03:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:09,793 INFO L225 Difference]: With dead ends: 69 [2019-09-03 20:03:09,793 INFO L226 Difference]: Without dead ends: 66 [2019-09-03 20:03:09,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 20:03:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-03 20:03:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-03 20:03:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-03 20:03:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-03 20:03:09,801 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-03 20:03:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:09,801 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-03 20:03:09,801 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-03 20:03:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-03 20:03:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-03 20:03:09,802 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:09,802 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:09,802 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:09,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-09-03 20:03:09,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:09,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:09,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:09,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:09,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:09,811 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:09,811 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:09,811 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:09,828 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:03:11,032 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-03 20:03:11,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:11,038 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-03 20:03:11,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:12,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:12,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:12,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-03 20:03:12,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-03 20:03:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-03 20:03:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 20:03:12,669 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-03 20:03:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:15,021 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-03 20:03:15,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-03 20:03:15,021 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-03 20:03:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:15,022 INFO L225 Difference]: With dead ends: 70 [2019-09-03 20:03:15,022 INFO L226 Difference]: Without dead ends: 67 [2019-09-03 20:03:15,022 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-03 20:03:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-03 20:03:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-03 20:03:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-03 20:03:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-03 20:03:15,028 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-03 20:03:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:15,028 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-03 20:03:15,028 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-03 20:03:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-03 20:03:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-03 20:03:15,029 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:15,029 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:15,029 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-09-03 20:03:15,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:15,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:15,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:15,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:15,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:15,038 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:15,038 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:15,038 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:15,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:03:15,167 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-03 20:03:15,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:16,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:16,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:16,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-03 20:03:16,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-03 20:03:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-03 20:03:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-03 20:03:16,843 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-03 20:03:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:19,298 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-03 20:03:19,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-03 20:03:19,298 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-03 20:03:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:19,298 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:03:19,299 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:03:19,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-03 20:03:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:03:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-03 20:03:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 20:03:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-03 20:03:19,304 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-03 20:03:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:19,304 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-03 20:03:19,304 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-03 20:03:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-03 20:03:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-03 20:03:19,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:19,305 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:19,305 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-09-03 20:03:19,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:19,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:19,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:19,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:19,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:19,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:19,314 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:19,314 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:19,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:03:19,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:03:19,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:19,453 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-03 20:03:19,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:21,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:21,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:21,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-03 20:03:21,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-03 20:03:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-03 20:03:21,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-03 20:03:21,258 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-03 20:03:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:23,701 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-03 20:03:23,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-03 20:03:23,701 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-03 20:03:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:23,702 INFO L225 Difference]: With dead ends: 72 [2019-09-03 20:03:23,702 INFO L226 Difference]: Without dead ends: 69 [2019-09-03 20:03:23,703 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-03 20:03:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-03 20:03:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-03 20:03:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-03 20:03:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-03 20:03:23,709 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-03 20:03:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:23,709 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-03 20:03:23,709 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-03 20:03:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-03 20:03:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-03 20:03:23,710 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:23,710 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:23,710 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:23,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:23,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-09-03 20:03:23,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:23,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:23,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:23,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:23,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:23,718 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:23,718 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:23,719 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:03:23,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:30,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-03 20:03:30,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:30,840 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-03 20:03:30,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:32,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:32,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:32,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-03 20:03:32,626 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-03 20:03:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-03 20:03:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-03 20:03:32,627 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-03 20:03:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:35,116 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-03 20:03:35,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-03 20:03:35,117 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-03 20:03:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:35,118 INFO L225 Difference]: With dead ends: 73 [2019-09-03 20:03:35,118 INFO L226 Difference]: Without dead ends: 70 [2019-09-03 20:03:35,118 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-09-03 20:03:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-03 20:03:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-03 20:03:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-03 20:03:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-03 20:03:35,126 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-03 20:03:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:35,126 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-03 20:03:35,126 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-03 20:03:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-03 20:03:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-03 20:03:35,127 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:35,127 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:35,128 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-09-03 20:03:35,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:35,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:35,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:35,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:35,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:35,136 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:35,136 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:35,136 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:35,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:03:35,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:03:35,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:35,771 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-03 20:03:35,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:37,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:37,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:37,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-03 20:03:37,652 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-03 20:03:37,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-03 20:03:37,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-03 20:03:37,653 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-03 20:03:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:40,227 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-03 20:03:40,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-03 20:03:40,228 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-03 20:03:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:40,228 INFO L225 Difference]: With dead ends: 74 [2019-09-03 20:03:40,228 INFO L226 Difference]: Without dead ends: 71 [2019-09-03 20:03:40,229 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-03 20:03:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-03 20:03:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-03 20:03:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-03 20:03:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-03 20:03:40,235 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-03 20:03:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:40,235 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-03 20:03:40,235 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-03 20:03:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-03 20:03:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-03 20:03:40,235 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:40,236 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:40,236 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-09-03 20:03:40,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:40,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:40,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:40,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:40,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:40,244 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:40,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:40,245 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:03:40,274 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:40,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-03 20:03:40,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:40,451 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-03 20:03:40,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:42,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:42,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:42,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-03 20:03:42,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-03 20:03:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-03 20:03:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-03 20:03:42,372 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-03 20:03:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:45,059 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-03 20:03:45,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-03 20:03:45,059 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-03 20:03:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:45,060 INFO L225 Difference]: With dead ends: 75 [2019-09-03 20:03:45,060 INFO L226 Difference]: Without dead ends: 72 [2019-09-03 20:03:45,061 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-03 20:03:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-03 20:03:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-03 20:03:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-03 20:03:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-03 20:03:45,066 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-03 20:03:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:45,066 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-03 20:03:45,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-03 20:03:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-03 20:03:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-03 20:03:45,067 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:45,067 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:45,067 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-09-03 20:03:45,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:45,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:45,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:45,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:45,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:45,074 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:45,075 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:45,075 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:03:45,087 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:47,348 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-03 20:03:47,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:47,355 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-03 20:03:47,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:49,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:49,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:49,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-03 20:03:49,318 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-03 20:03:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-03 20:03:49,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-03 20:03:49,319 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-03 20:03:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:52,082 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-03 20:03:52,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-03 20:03:52,082 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-03 20:03:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:52,083 INFO L225 Difference]: With dead ends: 76 [2019-09-03 20:03:52,083 INFO L226 Difference]: Without dead ends: 73 [2019-09-03 20:03:52,083 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-09-03 20:03:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-03 20:03:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-03 20:03:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-03 20:03:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-03 20:03:52,091 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-03 20:03:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:52,091 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-03 20:03:52,092 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-03 20:03:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-03 20:03:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-03 20:03:52,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:52,092 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:52,093 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-09-03 20:03:52,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:52,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:52,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:52,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:52,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:52,101 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:52,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:52,101 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:03:52,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:03:52,265 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-03 20:03:52,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:54,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:54,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:54,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-03 20:03:54,310 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-03 20:03:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-03 20:03:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-03 20:03:54,316 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-03 20:03:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:57,294 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-03 20:03:57,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-03 20:03:57,295 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-03 20:03:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:57,296 INFO L225 Difference]: With dead ends: 77 [2019-09-03 20:03:57,296 INFO L226 Difference]: Without dead ends: 74 [2019-09-03 20:03:57,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-09-03 20:03:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-03 20:03:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-03 20:03:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-03 20:03:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-03 20:03:57,305 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-03 20:03:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:57,305 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-03 20:03:57,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-03 20:03:57,306 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-03 20:03:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 20:03:57,306 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:57,306 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:57,307 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:57,307 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-09-03 20:03:57,307 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:57,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:57,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:57,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:57,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:57,315 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:57,315 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:57,315 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:57,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:03:57,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:03:57,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:57,552 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-03 20:03:57,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:59,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:59,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:59,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-03 20:03:59,598 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-03 20:03:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-03 20:03:59,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-03 20:03:59,599 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-03 20:04:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:02,554 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-03 20:04:02,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-03 20:04:02,554 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-03 20:04:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:02,555 INFO L225 Difference]: With dead ends: 78 [2019-09-03 20:04:02,555 INFO L226 Difference]: Without dead ends: 75 [2019-09-03 20:04:02,555 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-03 20:04:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-03 20:04:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-03 20:04:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-03 20:04:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-03 20:04:02,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-03 20:04:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:02,563 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-03 20:04:02,563 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-03 20:04:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-03 20:04:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-03 20:04:02,564 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:02,564 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:02,564 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-09-03 20:04:02,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:02,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:02,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:02,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:02,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:02,574 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:02,574 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:02,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:02,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:04:14,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-03 20:04:14,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:14,268 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-03 20:04:14,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:16,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:16,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:16,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-03 20:04:16,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-03 20:04:16,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-03 20:04:16,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-03 20:04:16,453 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-03 20:04:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:19,532 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-03 20:04:19,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-03 20:04:19,533 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-03 20:04:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:19,533 INFO L225 Difference]: With dead ends: 79 [2019-09-03 20:04:19,534 INFO L226 Difference]: Without dead ends: 76 [2019-09-03 20:04:19,534 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 20:04:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-03 20:04:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-03 20:04:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-03 20:04:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-03 20:04:19,542 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-03 20:04:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:19,542 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-03 20:04:19,542 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-03 20:04:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-03 20:04:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-03 20:04:19,543 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:19,543 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:19,543 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-09-03 20:04:19,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:19,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:19,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:19,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:19,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:19,552 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:19,552 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:19,552 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:04:19,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:20,334 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:04:20,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:20,338 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-03 20:04:20,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:22,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:22,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:22,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-03 20:04:22,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-03 20:04:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-03 20:04:22,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 20:04:22,561 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-03 20:04:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:25,611 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-03 20:04:25,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-03 20:04:25,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-03 20:04:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:25,613 INFO L225 Difference]: With dead ends: 80 [2019-09-03 20:04:25,613 INFO L226 Difference]: Without dead ends: 77 [2019-09-03 20:04:25,613 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-03 20:04:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-03 20:04:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-03 20:04:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-03 20:04:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-03 20:04:25,621 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-03 20:04:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:25,622 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-03 20:04:25,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-03 20:04:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-03 20:04:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-03 20:04:25,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:25,622 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:25,623 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:25,623 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-09-03 20:04:25,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:25,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:25,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:25,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:25,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:25,631 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:25,632 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:25,632 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:25,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:04:25,896 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-03 20:04:25,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:25,900 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-03 20:04:25,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:28,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:28,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:28,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-03 20:04:28,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-03 20:04:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-03 20:04:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-03 20:04:28,233 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-03 20:04:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:31,609 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-03 20:04:31,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-03 20:04:31,609 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-03 20:04:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:31,610 INFO L225 Difference]: With dead ends: 81 [2019-09-03 20:04:31,610 INFO L226 Difference]: Without dead ends: 78 [2019-09-03 20:04:31,610 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-03 20:04:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-03 20:04:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-03 20:04:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-03 20:04:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-03 20:04:31,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-03 20:04:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:31,618 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-03 20:04:31,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-03 20:04:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-03 20:04:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-03 20:04:31,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:31,618 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:31,618 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-09-03 20:04:31,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:31,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:31,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:31,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:31,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:31,632 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:31,632 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:31,632 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:04:31,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:34,600 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-03 20:04:34,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:34,605 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-03 20:04:34,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:36,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:36,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:36,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-03 20:04:36,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-03 20:04:36,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-03 20:04:36,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-03 20:04:36,972 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-03 20:04:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:40,389 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-03 20:04:40,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-03 20:04:40,390 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-03 20:04:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:40,390 INFO L225 Difference]: With dead ends: 82 [2019-09-03 20:04:40,391 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 20:04:40,391 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-09-03 20:04:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 20:04:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-03 20:04:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-03 20:04:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-03 20:04:40,399 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-03 20:04:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:40,400 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-03 20:04:40,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-03 20:04:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-03 20:04:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-03 20:04:40,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:40,400 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:40,400 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-09-03 20:04:40,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:40,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:40,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:40,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:40,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:40,408 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:40,408 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:40,408 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:04:40,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:40,620 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-03 20:04:40,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:42,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:43,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:43,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-03 20:04:43,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-03 20:04:43,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-03 20:04:43,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-03 20:04:43,069 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-03 20:04:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:46,463 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-03 20:04:46,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-03 20:04:46,463 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-03 20:04:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:46,464 INFO L225 Difference]: With dead ends: 83 [2019-09-03 20:04:46,464 INFO L226 Difference]: Without dead ends: 80 [2019-09-03 20:04:46,465 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-09-03 20:04:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-03 20:04:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-03 20:04:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-03 20:04:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-03 20:04:46,477 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-03 20:04:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:46,477 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-03 20:04:46,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-03 20:04:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-03 20:04:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 20:04:46,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:46,478 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:46,478 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-09-03 20:04:46,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:46,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:46,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:46,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:46,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:46,487 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:46,487 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:46,487 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:04:46,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:46,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:46,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:46,720 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-03 20:04:46,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:49,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:49,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:49,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-03 20:04:49,171 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-03 20:04:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-03 20:04:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-03 20:04:49,172 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-03 20:04:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:52,640 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-03 20:04:52,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-03 20:04:52,640 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-03 20:04:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:52,641 INFO L225 Difference]: With dead ends: 84 [2019-09-03 20:04:52,641 INFO L226 Difference]: Without dead ends: 81 [2019-09-03 20:04:52,642 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-09-03 20:04:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-03 20:04:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-03 20:04:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-03 20:04:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-03 20:04:52,648 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-03 20:04:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:52,648 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-03 20:04:52,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-03 20:04:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-03 20:04:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-03 20:04:52,649 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:52,649 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:52,649 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-09-03 20:04:52,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:52,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:52,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:52,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:52,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:52,656 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:52,656 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:52,657 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:04:52,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:10,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-03 20:05:10,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:10,869 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-03 20:05:10,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:13,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:13,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:13,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-03 20:05:13,434 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-03 20:05:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-03 20:05:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-03 20:05:13,435 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-03 20:05:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:17,087 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-03 20:05:17,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-03 20:05:17,087 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-03 20:05:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:17,088 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:05:17,088 INFO L226 Difference]: Without dead ends: 82 [2019-09-03 20:05:17,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 20:05:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-03 20:05:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-03 20:05:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-03 20:05:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-03 20:05:17,096 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-03 20:05:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:17,096 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-03 20:05:17,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-03 20:05:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-03 20:05:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-03 20:05:17,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:17,097 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:17,097 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-09-03 20:05:17,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:17,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:17,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:17,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:17,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:17,105 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:17,106 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:17,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:17,120 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:05:17,989 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:05:17,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:17,994 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-03 20:05:17,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:20,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:20,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:20,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-03 20:05:20,599 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-03 20:05:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-03 20:05:20,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 20:05:20,599 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-03 20:05:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:24,234 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-03 20:05:24,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-03 20:05:24,235 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-03 20:05:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:24,235 INFO L225 Difference]: With dead ends: 86 [2019-09-03 20:05:24,236 INFO L226 Difference]: Without dead ends: 83 [2019-09-03 20:05:24,236 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-09-03 20:05:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-03 20:05:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-03 20:05:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-03 20:05:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-03 20:05:24,248 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-03 20:05:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:24,249 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-03 20:05:24,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-03 20:05:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-03 20:05:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-03 20:05:24,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:24,249 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:24,249 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:24,250 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-09-03 20:05:24,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:24,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:24,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:24,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:24,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:24,257 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:24,257 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:24,257 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:05:24,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:24,652 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-03 20:05:24,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:24,657 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-03 20:05:24,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:27,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:27,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:27,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-03 20:05:27,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-03 20:05:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-03 20:05:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-03 20:05:27,430 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-03 20:05:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:31,354 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-03 20:05:31,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-03 20:05:31,355 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-03 20:05:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:31,355 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:05:31,356 INFO L226 Difference]: Without dead ends: 84 [2019-09-03 20:05:31,356 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-03 20:05:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-03 20:05:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-03 20:05:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-03 20:05:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-03 20:05:31,365 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-03 20:05:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:31,366 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-03 20:05:31,366 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-03 20:05:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-03 20:05:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-03 20:05:31,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:31,367 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:31,367 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:31,367 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-09-03 20:05:31,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:31,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:31,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:31,375 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:31,376 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:31,376 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:31,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:05:35,217 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-03 20:05:35,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:35,224 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-03 20:05:35,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:38,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:38,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:38,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-03 20:05:38,531 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-03 20:05:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-03 20:05:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-03 20:05:38,532 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-03 20:05:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:42,568 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-03 20:05:42,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-03 20:05:42,569 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-03 20:05:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:42,569 INFO L225 Difference]: With dead ends: 88 [2019-09-03 20:05:42,569 INFO L226 Difference]: Without dead ends: 85 [2019-09-03 20:05:42,570 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-03 20:05:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-03 20:05:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-03 20:05:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-03 20:05:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-03 20:05:42,576 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-03 20:05:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:42,576 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-03 20:05:42,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-03 20:05:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-03 20:05:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-03 20:05:42,583 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:42,583 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:42,583 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:42,583 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-09-03 20:05:42,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:42,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:42,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:42,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:42,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:42,591 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:42,592 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:42,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:05:42,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:42,832 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-03 20:05:42,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:45,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:45,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:45,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-03 20:05:45,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-03 20:05:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-03 20:05:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-03 20:05:45,752 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-03 20:05:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:49,766 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-03 20:05:49,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-03 20:05:49,766 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-03 20:05:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:49,767 INFO L225 Difference]: With dead ends: 89 [2019-09-03 20:05:49,767 INFO L226 Difference]: Without dead ends: 86 [2019-09-03 20:05:49,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-09-03 20:05:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-03 20:05:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-03 20:05:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-03 20:05:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-03 20:05:49,774 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-03 20:05:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:49,774 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-03 20:05:49,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-03 20:05:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-03 20:05:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-03 20:05:49,775 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:49,775 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:49,775 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:49,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-09-03 20:05:49,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:49,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:49,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:49,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:49,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:49,787 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:49,787 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:49,787 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:05:49,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:50,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:50,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:50,046 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-03 20:05:50,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:53,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:53,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:53,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-03 20:05:53,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-03 20:05:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-03 20:05:53,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-03 20:05:53,113 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-03 20:05:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:57,275 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-03 20:05:57,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-03 20:05:57,276 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-03 20:05:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:57,276 INFO L225 Difference]: With dead ends: 90 [2019-09-03 20:05:57,277 INFO L226 Difference]: Without dead ends: 87 [2019-09-03 20:05:57,277 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-09-03 20:05:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-03 20:05:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-03 20:05:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-03 20:05:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-03 20:05:57,285 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-03 20:05:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:57,286 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-03 20:05:57,286 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-03 20:05:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-03 20:05:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-03 20:05:57,286 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:57,287 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:57,287 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:57,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-09-03 20:05:57,287 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:57,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:57,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:57,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:57,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:57,295 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:57,295 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:57,295 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:57,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:06:22,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-03 20:06:22,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:22,518 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-03 20:06:22,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:25,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:25,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:25,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-03 20:06:25,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-03 20:06:25,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-03 20:06:25,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-03 20:06:25,483 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-03 20:06:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:29,606 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-03 20:06:29,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-03 20:06:29,607 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-03 20:06:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:29,608 INFO L225 Difference]: With dead ends: 91 [2019-09-03 20:06:29,608 INFO L226 Difference]: Without dead ends: 88 [2019-09-03 20:06:29,609 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-03 20:06:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-03 20:06:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-03 20:06:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-03 20:06:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-03 20:06:29,617 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-03 20:06:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:29,618 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-03 20:06:29,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-03 20:06:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-03 20:06:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-03 20:06:29,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:29,619 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:29,619 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-09-03 20:06:29,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:29,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:29,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:29,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:29,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:29,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:29,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:29,628 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:06:29,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:06:30,670 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:06:30,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:30,675 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-03 20:06:30,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:34,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:34,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:34,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-03 20:06:34,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-03 20:06:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-03 20:06:34,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-03 20:06:34,169 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-03 20:06:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:38,556 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-03 20:06:38,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-03 20:06:38,557 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-03 20:06:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:38,558 INFO L225 Difference]: With dead ends: 92 [2019-09-03 20:06:38,558 INFO L226 Difference]: Without dead ends: 89 [2019-09-03 20:06:38,559 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-09-03 20:06:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-03 20:06:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-03 20:06:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-03 20:06:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-03 20:06:38,566 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-03 20:06:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:38,566 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-03 20:06:38,566 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-03 20:06:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-03 20:06:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-03 20:06:38,566 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:38,566 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:38,567 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:38,567 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-09-03 20:06:38,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:38,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:38,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:38,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:38,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:38,574 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:38,575 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:38,575 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:06:38,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:06:38,953 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-03 20:06:38,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:38,958 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-03 20:06:38,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:42,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:42,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:42,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-03 20:06:42,093 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-03 20:06:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-03 20:06:42,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-03 20:06:42,094 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-03 20:06:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:46,596 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-03 20:06:46,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-03 20:06:46,597 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-03 20:06:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:46,597 INFO L225 Difference]: With dead ends: 93 [2019-09-03 20:06:46,598 INFO L226 Difference]: Without dead ends: 90 [2019-09-03 20:06:46,598 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-03 20:06:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-03 20:06:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-03 20:06:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-03 20:06:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-03 20:06:46,605 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-03 20:06:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:46,606 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-03 20:06:46,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-03 20:06:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-03 20:06:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-03 20:06:46,606 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:46,606 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:46,607 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-09-03 20:06:46,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:46,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:46,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:46,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:46,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:46,614 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:46,614 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:46,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:06:46,624 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:06:52,537 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-03 20:06:52,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:52,545 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-03 20:06:52,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:55,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:55,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:55,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-03 20:06:55,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-03 20:06:55,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-03 20:06:55,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-03 20:06:55,678 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-03 20:07:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:00,252 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-03 20:07:00,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-03 20:07:00,252 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-03 20:07:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:00,253 INFO L225 Difference]: With dead ends: 94 [2019-09-03 20:07:00,253 INFO L226 Difference]: Without dead ends: 91 [2019-09-03 20:07:00,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-09-03 20:07:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-03 20:07:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-03 20:07:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-03 20:07:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-03 20:07:00,261 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-03 20:07:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:00,262 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-03 20:07:00,262 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-03 20:07:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-03 20:07:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-03 20:07:00,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:00,262 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:00,262 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-09-03 20:07:00,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:00,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:00,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:00,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:00,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:00,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:00,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:00,270 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:07:00,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:00,638 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-03 20:07:00,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:04,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:04,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:04,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-03 20:07:04,107 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-03 20:07:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-03 20:07:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-03 20:07:04,107 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-03 20:07:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:08,702 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-03 20:07:08,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-03 20:07:08,703 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-03 20:07:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:08,704 INFO L225 Difference]: With dead ends: 95 [2019-09-03 20:07:08,704 INFO L226 Difference]: Without dead ends: 92 [2019-09-03 20:07:08,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-09-03 20:07:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-03 20:07:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-03 20:07:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-03 20:07:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-03 20:07:08,714 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-03 20:07:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:08,714 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-03 20:07:08,714 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-03 20:07:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-03 20:07:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:07:08,714 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:08,715 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:08,715 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-09-03 20:07:08,715 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:08,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:08,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:08,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:08,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:08,723 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:08,723 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:08,723 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:07:08,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:07:09,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:07:09,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:09,022 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-03 20:07:09,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:12,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:12,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:12,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-03 20:07:12,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-03 20:07:12,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-03 20:07:12,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-03 20:07:12,284 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-03 20:07:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:17,172 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-03 20:07:17,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-03 20:07:17,172 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-03 20:07:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:17,173 INFO L225 Difference]: With dead ends: 96 [2019-09-03 20:07:17,173 INFO L226 Difference]: Without dead ends: 93 [2019-09-03 20:07:17,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-09-03 20:07:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-03 20:07:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-03 20:07:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-03 20:07:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-03 20:07:17,184 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-03 20:07:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:17,184 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-03 20:07:17,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-03 20:07:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-03 20:07:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-03 20:07:17,185 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:17,185 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:17,185 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-09-03 20:07:17,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:17,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:17,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:17,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:17,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:17,194 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:17,194 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:17,194 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:07:17,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:07:53,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-03 20:07:53,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:53,394 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-03 20:07:53,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:56,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:56,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:56,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-03 20:07:56,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-03 20:07:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-03 20:07:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-03 20:07:56,815 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-03 20:08:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:01,679 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-03 20:08:01,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-03 20:08:01,680 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-03 20:08:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:01,680 INFO L225 Difference]: With dead ends: 97 [2019-09-03 20:08:01,680 INFO L226 Difference]: Without dead ends: 94 [2019-09-03 20:08:01,681 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-09-03 20:08:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-03 20:08:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-03 20:08:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-03 20:08:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-03 20:08:01,689 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-03 20:08:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:01,689 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-03 20:08:01,689 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-03 20:08:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-03 20:08:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-03 20:08:01,689 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:01,689 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:01,690 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-09-03 20:08:01,690 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:01,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:01,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:01,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:01,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:01,698 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:01,698 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:01,698 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:01,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:08:02,985 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:08:02,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:02,991 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-03 20:08:02,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:06,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:06,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:06,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-03 20:08:06,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-03 20:08:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-03 20:08:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-03 20:08:06,425 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-03 20:08:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:11,519 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-03 20:08:11,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-03 20:08:11,520 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-03 20:08:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:11,520 INFO L225 Difference]: With dead ends: 98 [2019-09-03 20:08:11,520 INFO L226 Difference]: Without dead ends: 95 [2019-09-03 20:08:11,521 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-09-03 20:08:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-03 20:08:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-03 20:08:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-03 20:08:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-03 20:08:11,527 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-03 20:08:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:11,528 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-03 20:08:11,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-03 20:08:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-03 20:08:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-03 20:08:11,528 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:11,528 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:11,528 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:11,529 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-09-03 20:08:11,529 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:11,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:11,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:11,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:11,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:11,535 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:11,535 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:11,535 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:11,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:08:11,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-03 20:08:11,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:11,994 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-03 20:08:11,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:15,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:08:15,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:15,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-03 20:08:15,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-03 20:08:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-03 20:08:15,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-03 20:08:15,576 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-03 20:08:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:20,686 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-03 20:08:20,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-03 20:08:20,686 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-03 20:08:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:20,687 INFO L225 Difference]: With dead ends: 99 [2019-09-03 20:08:20,687 INFO L226 Difference]: Without dead ends: 96 [2019-09-03 20:08:20,688 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-09-03 20:08:20,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-03 20:08:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-03 20:08:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 20:08:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-03 20:08:20,697 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-03 20:08:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:20,697 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-03 20:08:20,697 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-03 20:08:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-03 20:08:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-03 20:08:20,698 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:20,698 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:20,698 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:20,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-09-03 20:08:20,698 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:20,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:20,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:20,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:20,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:20,712 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:20,712 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:20,712 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:20,724 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:08:28,209 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-03 20:08:28,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:28,218 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-03 20:08:28,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:31,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:32,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:32,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-03 20:08:32,061 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-03 20:08:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-03 20:08:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-03 20:08:32,062 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-03 20:08:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:37,214 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-03 20:08:37,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-03 20:08:37,214 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-03 20:08:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:37,215 INFO L225 Difference]: With dead ends: 100 [2019-09-03 20:08:37,215 INFO L226 Difference]: Without dead ends: 97 [2019-09-03 20:08:37,216 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-03 20:08:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-03 20:08:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-03 20:08:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-03 20:08:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-03 20:08:37,224 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-03 20:08:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:37,224 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-03 20:08:37,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-03 20:08:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-03 20:08:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-03 20:08:37,225 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:37,225 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:37,225 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-09-03 20:08:37,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:37,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:37,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:37,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:37,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:37,235 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:37,235 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:37,235 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:37,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:37,587 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-03 20:08:37,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:41,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:08:41,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:41,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-03 20:08:41,338 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-03 20:08:41,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-03 20:08:41,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-03 20:08:41,339 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-03 20:08:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:46,853 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-03 20:08:46,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-03 20:08:46,853 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-03 20:08:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:46,854 INFO L225 Difference]: With dead ends: 101 [2019-09-03 20:08:46,855 INFO L226 Difference]: Without dead ends: 98 [2019-09-03 20:08:46,855 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 20:08:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-03 20:08:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-03 20:08:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-03 20:08:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-03 20:08:46,865 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-03 20:08:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:46,865 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-03 20:08:46,865 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-03 20:08:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-03 20:08:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-03 20:08:46,866 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:46,866 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:46,867 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-09-03 20:08:46,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:46,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:46,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:46,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:46,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:46,876 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:46,876 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:46,876 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:46,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:08:47,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:08:47,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:47,255 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-03 20:08:47,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:50,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:50,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:50,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-03 20:08:50,993 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-03 20:08:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-03 20:08:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 20:08:50,994 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-03 20:08:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:56,405 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-03 20:08:56,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-03 20:08:56,405 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-03 20:08:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:56,406 INFO L225 Difference]: With dead ends: 102 [2019-09-03 20:08:56,406 INFO L226 Difference]: Without dead ends: 99 [2019-09-03 20:08:56,406 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-03 20:08:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-03 20:08:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-03 20:08:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-03 20:08:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-03 20:08:56,414 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-03 20:08:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:56,414 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-03 20:08:56,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-03 20:08:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-03 20:08:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-03 20:08:56,415 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:56,415 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:56,415 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-09-03 20:08:56,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:56,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:56,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:56,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:56,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:56,422 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:56,422 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:56,422 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:56,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:09:47,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-03 20:09:47,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:47,902 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-03 20:09:47,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:51,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:09:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:09:51,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:09:51,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-03 20:09:51,804 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-03 20:09:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-03 20:09:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-03 20:09:51,805 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-03 20:09:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:57,298 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-03 20:09:57,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-03 20:09:57,298 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-03 20:09:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:57,299 INFO L225 Difference]: With dead ends: 103 [2019-09-03 20:09:57,299 INFO L226 Difference]: Without dead ends: 100 [2019-09-03 20:09:57,300 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-09-03 20:09:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-03 20:09:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-03 20:09:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-03 20:09:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-03 20:09:57,308 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-03 20:09:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:57,308 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-03 20:09:57,308 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-03 20:09:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-03 20:09:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-03 20:09:57,308 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:57,309 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:57,309 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-09-03 20:09:57,309 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:57,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:57,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:57,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:09:57,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:57,318 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:09:57,318 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:09:57,318 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:09:57,347 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:09:58,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:09:58,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:58,715 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-03 20:09:58,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:02,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:02,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:02,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-03 20:10:02,651 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-03 20:10:02,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-03 20:10:02,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-03 20:10:02,652 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-03 20:10:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:08,546 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-03 20:10:08,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-03 20:10:08,546 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-03 20:10:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:08,547 INFO L225 Difference]: With dead ends: 104 [2019-09-03 20:10:08,547 INFO L226 Difference]: Without dead ends: 101 [2019-09-03 20:10:08,547 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-03 20:10:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-03 20:10:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-03 20:10:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-03 20:10:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-03 20:10:08,555 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-03 20:10:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:08,556 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-03 20:10:08,556 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-03 20:10:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-03 20:10:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-03 20:10:08,556 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:08,556 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:08,556 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-09-03 20:10:08,557 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:08,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:08,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:08,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:08,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:08,565 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:08,565 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:08,565 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:08,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:10:09,097 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-03 20:10:09,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:09,103 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-03 20:10:09,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:13,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:13,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:13,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-03 20:10:13,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-03 20:10:13,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-03 20:10:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-03 20:10:13,255 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-03 20:10:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:19,205 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-03 20:10:19,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-03 20:10:19,206 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-03 20:10:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:19,207 INFO L225 Difference]: With dead ends: 105 [2019-09-03 20:10:19,207 INFO L226 Difference]: Without dead ends: 102 [2019-09-03 20:10:19,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-09-03 20:10:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-03 20:10:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-03 20:10:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-03 20:10:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-03 20:10:19,216 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-03 20:10:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:19,216 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-03 20:10:19,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-03 20:10:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-03 20:10:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-03 20:10:19,217 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:19,217 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:19,217 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:19,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-09-03 20:10:19,218 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:19,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:19,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:19,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:19,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:19,235 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:19,236 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:19,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:19,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:10:31,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-03 20:10:31,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:31,272 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-03 20:10:31,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:35,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:35,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:35,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-03 20:10:35,547 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-03 20:10:35,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-03 20:10:35,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-03 20:10:35,548 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-03 20:10:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:41,457 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-03 20:10:41,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-03 20:10:41,457 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-03 20:10:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:41,458 INFO L225 Difference]: With dead ends: 106 [2019-09-03 20:10:41,458 INFO L226 Difference]: Without dead ends: 103 [2019-09-03 20:10:41,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-09-03 20:10:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-03 20:10:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-03 20:10:41,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-03 20:10:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-03 20:10:41,471 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-03 20:10:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:41,471 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-03 20:10:41,471 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-03 20:10:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-03 20:10:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-03 20:10:41,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:41,472 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:41,472 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-09-03 20:10:41,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:41,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:41,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:41,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,480 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:41,480 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:41,480 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:41,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:41,891 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-03 20:10:41,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:45,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:46,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:46,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-03 20:10:46,062 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-03 20:10:46,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-03 20:10:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-03 20:10:46,063 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-03 20:10:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:52,315 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-03 20:10:52,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-03 20:10:52,316 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-03 20:10:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:52,317 INFO L225 Difference]: With dead ends: 107 [2019-09-03 20:10:52,317 INFO L226 Difference]: Without dead ends: 104 [2019-09-03 20:10:52,317 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-09-03 20:10:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-03 20:10:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-03 20:10:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-03 20:10:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-03 20:10:52,326 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-03 20:10:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:52,326 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-03 20:10:52,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-03 20:10:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-03 20:10:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-03 20:10:52,327 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:52,327 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:52,327 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-09-03 20:10:52,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:52,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:52,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:52,336 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:52,336 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:52,336 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:52,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:10:52,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:10:52,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:52,737 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-03 20:10:52,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:56,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:57,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:57,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-03 20:10:57,061 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-03 20:10:57,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-03 20:10:57,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-03 20:10:57,062 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-03 20:11:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:03,210 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-03 20:11:03,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-03 20:11:03,211 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-03 20:11:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:03,212 INFO L225 Difference]: With dead ends: 108 [2019-09-03 20:11:03,212 INFO L226 Difference]: Without dead ends: 105 [2019-09-03 20:11:03,213 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-03 20:11:03,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-03 20:11:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-03 20:11:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-03 20:11:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-03 20:11:03,223 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-03 20:11:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:03,223 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-03 20:11:03,223 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-03 20:11:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-03 20:11:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-03 20:11:03,224 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:03,224 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:03,224 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-09-03 20:11:03,225 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:03,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:03,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:03,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:11:03,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:03,233 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:11:03,233 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:11:03,233 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:11:03,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:12:13,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-03 20:12:13,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:13,291 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-03 20:12:13,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:17,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:17,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:17,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-03 20:12:17,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-03 20:12:17,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-03 20:12:17,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-03 20:12:17,845 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-03 20:12:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:24,239 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-03 20:12:24,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-03 20:12:24,240 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-03 20:12:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:24,241 INFO L225 Difference]: With dead ends: 109 [2019-09-03 20:12:24,241 INFO L226 Difference]: Without dead ends: 106 [2019-09-03 20:12:24,242 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-03 20:12:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-03 20:12:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-03 20:12:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-03 20:12:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-03 20:12:24,253 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-03 20:12:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:24,253 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-03 20:12:24,253 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-03 20:12:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-03 20:12:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-03 20:12:24,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:24,254 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:24,254 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-09-03 20:12:24,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:24,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:24,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:24,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:24,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:24,264 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:24,264 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:24,264 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:24,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:12:25,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:12:25,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:25,818 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-03 20:12:25,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:30,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:30,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:30,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-03 20:12:30,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-03 20:12:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-03 20:12:30,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-03 20:12:30,278 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-03 20:12:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:37,003 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-03 20:12:37,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-03 20:12:37,004 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-03 20:12:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:37,004 INFO L225 Difference]: With dead ends: 110 [2019-09-03 20:12:37,004 INFO L226 Difference]: Without dead ends: 107 [2019-09-03 20:12:37,005 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-03 20:12:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-03 20:12:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-03 20:12:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-03 20:12:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-03 20:12:37,016 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-03 20:12:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:37,016 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-03 20:12:37,016 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-03 20:12:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-03 20:12:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-03 20:12:37,017 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:37,017 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:37,017 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-09-03 20:12:37,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:37,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:37,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:37,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:37,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:37,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:37,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:37,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:37,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:12:37,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-03 20:12:37,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:37,630 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-03 20:12:37,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:42,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:42,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:42,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-03 20:12:42,410 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-03 20:12:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-03 20:12:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-03 20:12:42,411 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-03 20:12:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:48,872 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-03 20:12:48,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-03 20:12:48,873 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-03 20:12:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:48,874 INFO L225 Difference]: With dead ends: 111 [2019-09-03 20:12:48,874 INFO L226 Difference]: Without dead ends: 108 [2019-09-03 20:12:48,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-03 20:12:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-03 20:12:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-03 20:12:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-03 20:12:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-03 20:12:48,894 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-03 20:12:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:48,895 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-03 20:12:48,895 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-03 20:12:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-03 20:12:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-03 20:12:48,895 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:48,896 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:48,896 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-09-03 20:12:48,896 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:48,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:48,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:48,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:48,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:48,904 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:48,904 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:48,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:48,928 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:13:03,142 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-03 20:13:03,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:13:03,154 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-03 20:13:03,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:13:07,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:13:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:13:07,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:13:07,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-03 20:13:07,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-03 20:13:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-03 20:13:07,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-03 20:13:07,713 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-03 20:13:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:13:14,313 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-03 20:13:14,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-03 20:13:14,313 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-03 20:13:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:13:14,314 INFO L225 Difference]: With dead ends: 112 [2019-09-03 20:13:14,314 INFO L226 Difference]: Without dead ends: 109 [2019-09-03 20:13:14,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-09-03 20:13:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-03 20:13:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-03 20:13:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-03 20:13:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-03 20:13:14,326 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-03 20:13:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:13:14,327 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-03 20:13:14,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-03 20:13:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-03 20:13:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-03 20:13:14,327 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:13:14,328 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:13:14,328 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:13:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:13:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-09-03 20:13:14,328 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:13:14,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:13:14,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:14,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:13:14,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:14,336 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:13:14,337 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:13:14,337 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:13:14,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:13:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:13:14,809 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-03 20:13:14,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:13:19,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:13:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:13:19,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:13:19,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-03 20:13:19,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-03 20:13:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-03 20:13:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-03 20:13:19,514 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-03 20:13:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:13:26,637 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-03 20:13:26,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-03 20:13:26,638 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-03 20:13:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:13:26,638 INFO L225 Difference]: With dead ends: 113 [2019-09-03 20:13:26,638 INFO L226 Difference]: Without dead ends: 110 [2019-09-03 20:13:26,639 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-09-03 20:13:26,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-03 20:13:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-03 20:13:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-03 20:13:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-03 20:13:26,649 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-03 20:13:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:13:26,649 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-03 20:13:26,649 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-03 20:13:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-03 20:13:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-03 20:13:26,649 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:13:26,649 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:13:26,650 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:13:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:13:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-09-03 20:13:26,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:13:26,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:13:26,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:26,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:13:26,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:26,658 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:13:26,658 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:13:26,658 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:13:26,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:13:27,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:13:27,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:13:27,201 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-03 20:13:27,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:13:31,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:13:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:13:31,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:13:31,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-03 20:13:31,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-03 20:13:31,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-03 20:13:31,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-03 20:13:31,951 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-03 20:13:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:13:38,813 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-03 20:13:38,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-03 20:13:38,814 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-03 20:13:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:13:38,814 INFO L225 Difference]: With dead ends: 114 [2019-09-03 20:13:38,815 INFO L226 Difference]: Without dead ends: 111 [2019-09-03 20:13:38,815 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-03 20:13:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-03 20:13:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-03 20:13:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-03 20:13:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-03 20:13:38,824 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-03 20:13:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:13:38,824 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-03 20:13:38,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-03 20:13:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-03 20:13:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-03 20:13:38,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:13:38,825 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:13:38,825 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:13:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:13:38,825 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-09-03 20:13:38,825 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:13:38,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:13:38,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:38,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:13:38,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:38,832 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:13:38,832 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:13:38,832 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:13:38,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2