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 0.1.24-673a906-m [2019-10-02 11:23:02,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:23:02,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:23:02,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:23:02,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:23:02,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:23:02,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:23:02,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:23:02,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:23:02,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:23:02,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:23:02,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:23:02,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:23:02,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:23:02,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:23:02,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:23:02,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:23:02,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:23:02,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:23:02,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:23:02,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:23:02,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:23:02,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:23:02,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:23:02,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:23:02,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:23:02,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:23:02,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:23:02,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 11:23:02,942 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:23:02,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:23:02,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:23:02,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:23:02,944 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:23:02,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:23:02,945 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:23:02,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:23:02,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:23:02,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:23:02,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:23:02,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:23:02,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:23:02,946 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:23:02,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:23:02,946 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:23:02,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:23:02,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:23:02,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:23:02,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:23:02,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:23:02,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:23:02,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:23:02,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:23:02,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:23:02,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:23:02,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:23:02,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:23:02,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:23:02,978 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:23:02,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:23:02,997 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:23:02,999 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:23:02,999 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:23:03,000 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-10-02 11:23:03,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d42a8fbc/6aa92337676241dfa90bcef083c30277/FLAG79772ed04 [2019-10-02 11:23:03,495 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:23:03,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-10-02 11:23:03,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d42a8fbc/6aa92337676241dfa90bcef083c30277/FLAG79772ed04 [2019-10-02 11:23:03,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d42a8fbc/6aa92337676241dfa90bcef083c30277 [2019-10-02 11:23:03,906 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:23:03,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:23:03,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:23:03,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:23:03,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:23:03,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:23:03" (1/1) ... [2019-10-02 11:23:03,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5a2437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:03, skipping insertion in model container [2019-10-02 11:23:03,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:23:03" (1/1) ... [2019-10-02 11:23:03,925 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:23:03,948 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:23:04,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:23:04,163 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:23:04,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:23:04,197 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:23:04,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04 WrapperNode [2019-10-02 11:23:04,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:23:04,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:23:04,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:23:04,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:23:04,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... [2019-10-02 11:23:04,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... [2019-10-02 11:23:04,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... [2019-10-02 11:23:04,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... [2019-10-02 11:23:04,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... [2019-10-02 11:23:04,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... [2019-10-02 11:23:04,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... [2019-10-02 11:23:04,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:23:04,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:23:04,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:23:04,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:23:04,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:23:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:23:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:23:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:23:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:23:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 11:23:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:23:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 11:23:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:23:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:23:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:23:04,556 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:23:04,556 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-02 11:23:04,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:23:04 BoogieIcfgContainer [2019-10-02 11:23:04,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:23:04,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:23:04,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:23:04,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:23:04,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:23:03" (1/3) ... [2019-10-02 11:23:04,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f171a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:23:04, skipping insertion in model container [2019-10-02 11:23:04,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:23:04" (2/3) ... [2019-10-02 11:23:04,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f171a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:23:04, skipping insertion in model container [2019-10-02 11:23:04,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:23:04" (3/3) ... [2019-10-02 11:23:04,566 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-10-02 11:23:04,573 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:23:04,580 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:23:04,596 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:23:04,623 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:23:04,624 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:23:04,624 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:23:04,624 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:23:04,624 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:23:04,624 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:23:04,624 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:23:04,624 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:23:04,625 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:23:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-02 11:23:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-02 11:23:04,645 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:04,646 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:04,648 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-02 11:23:04,654 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:04,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:04,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:04,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:04,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:04,737 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:04,738 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:04,738 INFO L224 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 [2019-10-02 11:23:04,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:04,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 11:23:04,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:04,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:23:04,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 11:23:04,903 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 11:23:04,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 11:23:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 11:23:04,938 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-02 11:23:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:05,063 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-02 11:23:05,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 11:23:05,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-02 11:23:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:05,074 INFO L225 Difference]: With dead ends: 26 [2019-10-02 11:23:05,075 INFO L226 Difference]: Without dead ends: 13 [2019-10-02 11:23:05,078 INFO L640 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 [2019-10-02 11:23:05,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-02 11:23:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-02 11:23:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-02 11:23:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-02 11:23:05,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-02 11:23:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:05,116 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-02 11:23:05,117 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 11:23:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-02 11:23:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-02 11:23:05,117 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:05,118 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:05,119 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:05,119 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-02 11:23:05,119 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:05,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:05,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:05,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,133 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:05,133 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:05,133 INFO L224 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) [2019-10-02 11:23:05,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:05,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-02 11:23:05,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:05,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:05,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:05,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 11:23:05,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:23:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:23:05,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:23:05,271 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-02 11:23:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:05,332 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-10-02 11:23:05,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:23:05,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-02 11:23:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:05,334 INFO L225 Difference]: With dead ends: 17 [2019-10-02 11:23:05,334 INFO L226 Difference]: Without dead ends: 14 [2019-10-02 11:23:05,335 INFO L640 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 [2019-10-02 11:23:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-02 11:23:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-02 11:23:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-02 11:23:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-02 11:23:05,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-02 11:23:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:05,341 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-02 11:23:05,341 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:23:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-02 11:23:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-02 11:23:05,342 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:05,342 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:05,343 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:05,343 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-10-02 11:23:05,343 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:05,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:05,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:05,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,359 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:05,359 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:05,359 INFO L224 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:05,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:05,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:05,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:05,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-02 11:23:05,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:05,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:05,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:05,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 11:23:05,469 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:23:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:23:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:23:05,470 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-10-02 11:23:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:05,535 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-02 11:23:05,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:23:05,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-02 11:23:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:05,537 INFO L225 Difference]: With dead ends: 18 [2019-10-02 11:23:05,537 INFO L226 Difference]: Without dead ends: 15 [2019-10-02 11:23:05,539 INFO L640 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 [2019-10-02 11:23:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-02 11:23:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-02 11:23:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-02 11:23:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-02 11:23:05,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-02 11:23:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:05,548 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-02 11:23:05,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:23:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-02 11:23:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-02 11:23:05,549 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:05,550 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:05,550 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:05,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-10-02 11:23:05,551 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:05,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:05,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:05,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,585 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:05,585 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:05,585 INFO L224 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 [2019-10-02 11:23:05,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:05,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-02 11:23:05,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:05,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-02 11:23:05,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:05,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:05,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:05,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 11:23:05,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 11:23:05,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 11:23:05,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:23:05,708 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-10-02 11:23:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:05,780 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-02 11:23:05,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:23:05,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-02 11:23:05,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:05,781 INFO L225 Difference]: With dead ends: 19 [2019-10-02 11:23:05,781 INFO L226 Difference]: Without dead ends: 16 [2019-10-02 11:23:05,782 INFO L640 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 [2019-10-02 11:23:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-02 11:23:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-02 11:23:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-02 11:23:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-02 11:23:05,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-02 11:23:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:05,787 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-02 11:23:05,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 11:23:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-02 11:23:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 11:23:05,788 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:05,788 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:05,789 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-10-02 11:23:05,789 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:05,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:05,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:05,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,802 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:05,803 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:05,803 INFO L224 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 [2019-10-02 11:23:05,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:05,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:05,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:05,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-02 11:23:05,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:05,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:05,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:05,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 11:23:05,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:23:05,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:23:05,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:23:05,980 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-10-02 11:23:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:06,052 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-02 11:23:06,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 11:23:06,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-02 11:23:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:06,053 INFO L225 Difference]: With dead ends: 20 [2019-10-02 11:23:06,053 INFO L226 Difference]: Without dead ends: 17 [2019-10-02 11:23:06,054 INFO L640 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 [2019-10-02 11:23:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-02 11:23:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-02 11:23:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-02 11:23:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-02 11:23:06,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-02 11:23:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:06,059 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-02 11:23:06,059 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:23:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-02 11:23:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-02 11:23:06,059 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:06,060 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:06,060 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:06,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-10-02 11:23:06,060 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:06,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:06,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:06,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:06,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:06,072 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:06,072 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:06,072 INFO L224 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 [2019-10-02 11:23:06,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:06,110 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-02 11:23:06,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:06,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-02 11:23:06,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:06,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:06,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:06,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:23:06,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:23:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:23:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:23:06,225 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-10-02 11:23:06,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:06,380 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-02 11:23:06,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:23:06,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-02 11:23:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:06,382 INFO L225 Difference]: With dead ends: 21 [2019-10-02 11:23:06,382 INFO L226 Difference]: Without dead ends: 18 [2019-10-02 11:23:06,382 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:23:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-02 11:23:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-02 11:23:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-02 11:23:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-02 11:23:06,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-02 11:23:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:06,387 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-02 11:23:06,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:23:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-02 11:23:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 11:23:06,388 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:06,388 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:06,388 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-10-02 11:23:06,389 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:06,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:06,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:06,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:06,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:06,411 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:06,412 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:06,412 INFO L224 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) [2019-10-02 11:23:06,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:06,463 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-02 11:23:06,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:06,465 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-02 11:23:06,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:06,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:06,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:06,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:23:06,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:23:06,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:23:06,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:23:06,604 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-02 11:23:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:06,708 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-02 11:23:06,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:23:06,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-02 11:23:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:06,709 INFO L225 Difference]: With dead ends: 22 [2019-10-02 11:23:06,710 INFO L226 Difference]: Without dead ends: 19 [2019-10-02 11:23:06,711 INFO L640 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 [2019-10-02 11:23:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-02 11:23:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-02 11:23:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-02 11:23:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-02 11:23:06,716 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-02 11:23:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:06,716 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-02 11:23:06,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:23:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-02 11:23:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-02 11:23:06,717 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:06,717 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:06,718 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-10-02 11:23:06,718 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:06,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:06,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:06,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:06,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:06,735 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:06,736 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:06,736 INFO L224 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 [2019-10-02 11:23:06,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:06,782 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-02 11:23:06,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:06,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:06,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:06,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:23:06,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:23:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:23:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:23:06,910 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-02 11:23:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:07,020 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-02 11:23:07,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:23:07,020 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-02 11:23:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:07,021 INFO L225 Difference]: With dead ends: 23 [2019-10-02 11:23:07,021 INFO L226 Difference]: Without dead ends: 20 [2019-10-02 11:23:07,022 INFO L640 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 [2019-10-02 11:23:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-02 11:23:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-02 11:23:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-02 11:23:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-02 11:23:07,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-02 11:23:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:07,028 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-02 11:23:07,028 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:23:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-02 11:23:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 11:23:07,029 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:07,029 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:07,029 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:07,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-10-02 11:23:07,030 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:07,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:07,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:07,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:07,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:07,042 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:07,043 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:07,043 INFO L224 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:07,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:07,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:07,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:07,096 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-02 11:23:07,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:07,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:07,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:07,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 11:23:07,261 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 11:23:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 11:23:07,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:23:07,262 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-02 11:23:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:07,391 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-02 11:23:07,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 11:23:07,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-02 11:23:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:07,393 INFO L225 Difference]: With dead ends: 24 [2019-10-02 11:23:07,393 INFO L226 Difference]: Without dead ends: 21 [2019-10-02 11:23:07,394 INFO L640 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 [2019-10-02 11:23:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-02 11:23:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-02 11:23:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-02 11:23:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-02 11:23:07,398 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-02 11:23:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:07,399 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-02 11:23:07,399 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 11:23:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-02 11:23:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 11:23:07,399 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:07,400 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:07,400 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:07,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-10-02 11:23:07,400 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:07,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:07,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:07,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:07,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:07,412 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:07,412 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:07,412 INFO L224 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:07,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:07,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-02 11:23:07,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:07,459 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-02 11:23:07,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:07,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:07,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:07,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 11:23:07,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 11:23:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 11:23:07,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:23:07,614 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-02 11:23:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:07,733 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-02 11:23:07,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 11:23:07,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-02 11:23:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:07,734 INFO L225 Difference]: With dead ends: 25 [2019-10-02 11:23:07,734 INFO L226 Difference]: Without dead ends: 22 [2019-10-02 11:23:07,735 INFO L640 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 [2019-10-02 11:23:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-02 11:23:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-02 11:23:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-02 11:23:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-02 11:23:07,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-02 11:23:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:07,740 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-02 11:23:07,740 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 11:23:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-02 11:23:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-02 11:23:07,741 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:07,741 INFO L411 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:07,741 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:07,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-10-02 11:23:07,742 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:07,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:07,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:07,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:07,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:07,753 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:07,753 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:07,753 INFO L224 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 [2019-10-02 11:23:07,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:07,875 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:07,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:07,876 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-02 11:23:07,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:08,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:08,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:08,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 11:23:08,034 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 11:23:08,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 11:23:08,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-02 11:23:08,035 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-02 11:23:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:08,197 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-02 11:23:08,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 11:23:08,198 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-02 11:23:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:08,199 INFO L225 Difference]: With dead ends: 26 [2019-10-02 11:23:08,200 INFO L226 Difference]: Without dead ends: 23 [2019-10-02 11:23:08,200 INFO L640 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 [2019-10-02 11:23:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-02 11:23:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-02 11:23:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-02 11:23:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-02 11:23:08,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-02 11:23:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:08,206 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-02 11:23:08,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 11:23:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-02 11:23:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 11:23:08,207 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:08,207 INFO L411 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:08,208 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-10-02 11:23:08,208 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:08,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:08,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:08,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:08,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:08,220 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:08,220 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:08,221 INFO L224 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:08,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:08,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-02 11:23:08,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:08,289 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-02 11:23:08,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:08,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:08,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:08,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 11:23:08,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 11:23:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 11:23:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-02 11:23:08,522 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-02 11:23:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:08,789 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-02 11:23:08,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 11:23:08,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-02 11:23:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:08,791 INFO L225 Difference]: With dead ends: 27 [2019-10-02 11:23:08,791 INFO L226 Difference]: Without dead ends: 24 [2019-10-02 11:23:08,791 INFO L640 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 [2019-10-02 11:23:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-02 11:23:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-02 11:23:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 11:23:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-02 11:23:08,801 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-02 11:23:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:08,802 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-02 11:23:08,802 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 11:23:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-02 11:23:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-02 11:23:08,803 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:08,803 INFO L411 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:08,804 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-10-02 11:23:08,805 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:08,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:08,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:08,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:08,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:08,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:08,839 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:08,840 INFO L224 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:08,877 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:08,910 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-02 11:23:08,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:08,913 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-02 11:23:08,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:09,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:09,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:09,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-02 11:23:09,193 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 11:23:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 11:23:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-02 11:23:09,193 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-02 11:23:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:09,364 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-02 11:23:09,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 11:23:09,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-02 11:23:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:09,366 INFO L225 Difference]: With dead ends: 28 [2019-10-02 11:23:09,366 INFO L226 Difference]: Without dead ends: 25 [2019-10-02 11:23:09,366 INFO L640 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 [2019-10-02 11:23:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-02 11:23:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-02 11:23:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-02 11:23:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-02 11:23:09,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-02 11:23:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:09,372 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-02 11:23:09,372 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-02 11:23:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-02 11:23:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-02 11:23:09,373 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:09,373 INFO L411 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:09,373 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-10-02 11:23:09,374 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:09,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:09,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:09,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:09,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:09,384 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:09,385 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:09,385 INFO L224 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) [2019-10-02 11:23:09,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:09,433 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-02 11:23:09,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:09,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:09,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:09,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 11:23:09,688 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 11:23:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 11:23:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-02 11:23:09,689 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-02 11:23:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:09,899 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-02 11:23:09,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 11:23:09,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-02 11:23:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:09,900 INFO L225 Difference]: With dead ends: 29 [2019-10-02 11:23:09,900 INFO L226 Difference]: Without dead ends: 26 [2019-10-02 11:23:09,902 INFO L640 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 [2019-10-02 11:23:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-02 11:23:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-02 11:23:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-02 11:23:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-02 11:23:09,908 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-02 11:23:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:09,908 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-02 11:23:09,908 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 11:23:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-02 11:23:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 11:23:09,909 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:09,909 INFO L411 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:09,909 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-10-02 11:23:09,910 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:09,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:09,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:09,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:09,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:09,936 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:09,936 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:09,936 INFO L224 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 [2019-10-02 11:23:09,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:09,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:09,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:09,985 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-02 11:23:09,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:10,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:10,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:10,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 11:23:10,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 11:23:10,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 11:23:10,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-02 11:23:10,244 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-02 11:23:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:10,543 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-02 11:23:10,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 11:23:10,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-02 11:23:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:10,545 INFO L225 Difference]: With dead ends: 30 [2019-10-02 11:23:10,546 INFO L226 Difference]: Without dead ends: 27 [2019-10-02 11:23:10,546 INFO L640 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 [2019-10-02 11:23:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-02 11:23:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-02 11:23:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-02 11:23:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-02 11:23:10,551 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-02 11:23:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:10,551 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-02 11:23:10,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 11:23:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-02 11:23:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-02 11:23:10,552 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:10,552 INFO L411 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:10,553 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-10-02 11:23:10,553 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:10,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:10,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:10,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:10,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:10,563 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:10,563 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:10,563 INFO L224 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 [2019-10-02 11:23:10,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:10,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-02 11:23:10,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:10,654 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-02 11:23:10,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:10,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:10,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:10,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 11:23:10,986 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 11:23:10,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 11:23:10,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-02 11:23:10,987 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-02 11:23:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:11,258 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-02 11:23:11,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 11:23:11,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-02 11:23:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:11,263 INFO L225 Difference]: With dead ends: 31 [2019-10-02 11:23:11,263 INFO L226 Difference]: Without dead ends: 28 [2019-10-02 11:23:11,264 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-10-02 11:23:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-02 11:23:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-02 11:23:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-02 11:23:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-02 11:23:11,269 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-02 11:23:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:11,270 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-02 11:23:11,270 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 11:23:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-02 11:23:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-02 11:23:11,271 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:11,271 INFO L411 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:11,271 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:11,271 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-10-02 11:23:11,271 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:11,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:11,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:11,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:11,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:11,281 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:11,281 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:11,281 INFO L224 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 [2019-10-02 11:23:11,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:11,412 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:11,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:11,414 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-02 11:23:11,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:11,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:11,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:11,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-02 11:23:11,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-02 11:23:11,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-02 11:23:11,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-02 11:23:11,715 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-02 11:23:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:11,995 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-02 11:23:11,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-02 11:23:11,996 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-02 11:23:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:11,997 INFO L225 Difference]: With dead ends: 32 [2019-10-02 11:23:11,997 INFO L226 Difference]: Without dead ends: 29 [2019-10-02 11:23:11,998 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-02 11:23:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-02 11:23:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-02 11:23:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-02 11:23:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-02 11:23:12,003 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-02 11:23:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:12,003 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-02 11:23:12,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-02 11:23:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-02 11:23:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 11:23:12,004 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:12,004 INFO L411 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:12,005 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:12,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-10-02 11:23:12,005 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:12,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:12,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:12,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:12,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:12,015 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:12,015 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:12,015 INFO L224 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 [2019-10-02 11:23:12,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:12,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-02 11:23:12,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:12,074 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-02 11:23:12,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:12,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:12,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:12,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-02 11:23:12,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-02 11:23:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-02 11:23:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-10-02 11:23:12,371 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-10-02 11:23:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:12,713 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-02 11:23:12,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-02 11:23:12,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-10-02 11:23:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:12,714 INFO L225 Difference]: With dead ends: 33 [2019-10-02 11:23:12,714 INFO L226 Difference]: Without dead ends: 30 [2019-10-02 11:23:12,715 INFO L640 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 [2019-10-02 11:23:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-02 11:23:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-02 11:23:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-02 11:23:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-02 11:23:12,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-02 11:23:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:12,721 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-02 11:23:12,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-02 11:23:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-02 11:23:12,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 11:23:12,722 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:12,722 INFO L411 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:12,722 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:12,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:12,723 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-10-02 11:23:12,723 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:12,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:12,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:12,733 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:12,733 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:12,733 INFO L224 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 [2019-10-02 11:23:12,778 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:12,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-02 11:23:12,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:12,821 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-02 11:23:12,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:13,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:13,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:13,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-02 11:23:13,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-02 11:23:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-02 11:23:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-02 11:23:13,154 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-02 11:23:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:13,522 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-02 11:23:13,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-02 11:23:13,522 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-02 11:23:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:13,523 INFO L225 Difference]: With dead ends: 34 [2019-10-02 11:23:13,523 INFO L226 Difference]: Without dead ends: 31 [2019-10-02 11:23:13,524 INFO L640 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 [2019-10-02 11:23:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-02 11:23:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-02 11:23:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-02 11:23:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-02 11:23:13,528 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-02 11:23:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:13,529 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-02 11:23:13,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-02 11:23:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-02 11:23:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-02 11:23:13,530 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:13,530 INFO L411 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:13,530 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:13,531 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-10-02 11:23:13,531 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:13,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:13,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:13,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:13,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:13,541 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:13,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:13,541 INFO L224 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 [2019-10-02 11:23:13,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:13,603 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-02 11:23:13,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:13,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:14,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:14,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-02 11:23:14,001 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-02 11:23:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-02 11:23:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-02 11:23:14,002 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-02 11:23:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:14,413 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-02 11:23:14,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-02 11:23:14,413 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-02 11:23:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:14,414 INFO L225 Difference]: With dead ends: 35 [2019-10-02 11:23:14,414 INFO L226 Difference]: Without dead ends: 32 [2019-10-02 11:23:14,415 INFO L640 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 [2019-10-02 11:23:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-02 11:23:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-02 11:23:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 11:23:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-02 11:23:14,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-02 11:23:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:14,424 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-02 11:23:14,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-02 11:23:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-02 11:23:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-02 11:23:14,425 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:14,425 INFO L411 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:14,426 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-10-02 11:23:14,426 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:14,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:14,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:14,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:14,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:14,452 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:14,453 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:14,453 INFO L224 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 [2019-10-02 11:23:14,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:14,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:14,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:14,515 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-02 11:23:14,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:14,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:14,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:14,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-02 11:23:14,848 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-02 11:23:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-02 11:23:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-02 11:23:14,849 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-02 11:23:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:15,306 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-02 11:23:15,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-02 11:23:15,307 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-02 11:23:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:15,308 INFO L225 Difference]: With dead ends: 36 [2019-10-02 11:23:15,308 INFO L226 Difference]: Without dead ends: 33 [2019-10-02 11:23:15,309 INFO L640 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 [2019-10-02 11:23:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-02 11:23:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-02 11:23:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 11:23:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-02 11:23:15,319 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-02 11:23:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:15,319 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-02 11:23:15,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-02 11:23:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-02 11:23:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 11:23:15,320 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:15,320 INFO L411 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:15,321 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:15,321 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-10-02 11:23:15,321 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:15,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:15,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:15,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:15,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:15,343 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:15,344 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:15,344 INFO L224 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:15,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:15,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-02 11:23:15,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:15,606 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-02 11:23:15,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:15,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:16,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:16,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-02 11:23:16,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-02 11:23:16,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-02 11:23:16,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-02 11:23:16,006 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-02 11:23:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:16,445 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-02 11:23:16,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-02 11:23:16,447 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-02 11:23:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:16,447 INFO L225 Difference]: With dead ends: 37 [2019-10-02 11:23:16,447 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 11:23:16,448 INFO L640 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 [2019-10-02 11:23:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 11:23:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-02 11:23:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-02 11:23:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-02 11:23:16,453 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-02 11:23:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:16,453 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-02 11:23:16,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-02 11:23:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-02 11:23:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-02 11:23:16,454 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:16,454 INFO L411 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:16,454 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:16,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-10-02 11:23:16,455 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:16,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:16,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:16,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:16,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:16,463 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:16,463 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:16,464 INFO L224 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:16,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:16,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:16,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:16,681 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-02 11:23:16,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:17,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:17,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:17,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-02 11:23:17,065 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-02 11:23:17,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-02 11:23:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-02 11:23:17,066 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-02 11:23:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:17,552 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-02 11:23:17,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-02 11:23:17,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-02 11:23:17,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:17,553 INFO L225 Difference]: With dead ends: 38 [2019-10-02 11:23:17,553 INFO L226 Difference]: Without dead ends: 35 [2019-10-02 11:23:17,555 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-02 11:23:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-02 11:23:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-02 11:23:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-02 11:23:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-02 11:23:17,561 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-02 11:23:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:17,561 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-02 11:23:17,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-02 11:23:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-02 11:23:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 11:23:17,562 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:17,562 INFO L411 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:17,562 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:17,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-10-02 11:23:17,563 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:17,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:17,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:17,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:17,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:17,571 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:17,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:17,571 INFO L224 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:17,603 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:17,644 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-02 11:23:17,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:17,646 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-02 11:23:17,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:18,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:18,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:18,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-02 11:23:18,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-02 11:23:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-02 11:23:18,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-02 11:23:18,040 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-02 11:23:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:18,542 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-02 11:23:18,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-02 11:23:18,543 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-02 11:23:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:18,544 INFO L225 Difference]: With dead ends: 39 [2019-10-02 11:23:18,544 INFO L226 Difference]: Without dead ends: 36 [2019-10-02 11:23:18,545 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-02 11:23:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-02 11:23:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-02 11:23:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-02 11:23:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-02 11:23:18,549 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-02 11:23:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:18,549 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-02 11:23:18,549 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-02 11:23:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-02 11:23:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-02 11:23:18,550 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:18,550 INFO L411 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:18,550 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:18,550 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-10-02 11:23:18,550 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:18,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:18,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:18,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:18,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:18,558 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:18,559 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:18,559 INFO L224 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) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:18,598 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:18,662 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-02 11:23:18,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:18,665 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-02 11:23:18,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:19,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:19,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:19,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-02 11:23:19,132 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-02 11:23:19,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-02 11:23:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-02 11:23:19,132 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-02 11:23:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:19,712 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-02 11:23:19,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-02 11:23:19,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-02 11:23:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:19,713 INFO L225 Difference]: With dead ends: 40 [2019-10-02 11:23:19,713 INFO L226 Difference]: Without dead ends: 37 [2019-10-02 11:23:19,714 INFO L640 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 [2019-10-02 11:23:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-02 11:23:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-02 11:23:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-02 11:23:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-02 11:23:19,719 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-02 11:23:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:19,719 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-02 11:23:19,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-02 11:23:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-02 11:23:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-02 11:23:19,720 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:19,720 INFO L411 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:19,720 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-10-02 11:23:19,721 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:19,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:19,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:19,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:19,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:19,734 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:19,734 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:19,734 INFO L224 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 [2019-10-02 11:23:19,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:19,807 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-02 11:23:19,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:20,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:20,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:20,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-02 11:23:20,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-02 11:23:20,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-02 11:23:20,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-02 11:23:20,282 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-02 11:23:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:20,887 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-02 11:23:20,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-02 11:23:20,887 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-02 11:23:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:20,888 INFO L225 Difference]: With dead ends: 41 [2019-10-02 11:23:20,888 INFO L226 Difference]: Without dead ends: 38 [2019-10-02 11:23:20,889 INFO L640 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 [2019-10-02 11:23:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-02 11:23:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-02 11:23:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 11:23:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-02 11:23:20,895 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-02 11:23:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:20,895 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-02 11:23:20,895 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-02 11:23:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-02 11:23:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:23:20,896 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:20,896 INFO L411 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:20,896 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:20,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-10-02 11:23:20,896 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:20,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:20,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:20,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:20,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:20,905 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:20,905 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:20,905 INFO L224 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 [2019-10-02 11:23:20,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:21,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:21,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:21,006 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-02 11:23:21,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:21,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:21,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:21,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-02 11:23:21,481 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-02 11:23:21,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-02 11:23:21,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-02 11:23:21,482 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-02 11:23:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:22,077 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-02 11:23:22,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-02 11:23:22,078 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-02 11:23:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:22,079 INFO L225 Difference]: With dead ends: 42 [2019-10-02 11:23:22,079 INFO L226 Difference]: Without dead ends: 39 [2019-10-02 11:23:22,080 INFO L640 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 [2019-10-02 11:23:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-02 11:23:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-02 11:23:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-02 11:23:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-02 11:23:22,084 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-02 11:23:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:22,085 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-02 11:23:22,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-02 11:23:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-02 11:23:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 11:23:22,085 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:22,085 INFO L411 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:22,085 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:22,086 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-10-02 11:23:22,086 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:22,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:22,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:22,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:22,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:22,094 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:22,094 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:22,094 INFO L224 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:22,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:22,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-02 11:23:22,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:22,433 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-02 11:23:22,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:22,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:22,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:22,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-02 11:23:22,972 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-02 11:23:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-02 11:23:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-02 11:23:22,973 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-02 11:23:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:23,656 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-02 11:23:23,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-02 11:23:23,656 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-02 11:23:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:23,657 INFO L225 Difference]: With dead ends: 43 [2019-10-02 11:23:23,657 INFO L226 Difference]: Without dead ends: 40 [2019-10-02 11:23:23,658 INFO L640 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 [2019-10-02 11:23:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-02 11:23:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-02 11:23:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-02 11:23:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-02 11:23:23,663 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-02 11:23:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:23,663 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-02 11:23:23,663 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-02 11:23:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-02 11:23:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-02 11:23:23,664 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:23,664 INFO L411 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:23,664 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-10-02 11:23:23,665 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:23,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:23,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:23,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:23,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:23,673 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:23,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:23,674 INFO L224 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 [2019-10-02 11:23:23,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:23,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:23,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:23,948 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-02 11:23:23,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:24,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:24,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:24,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-02 11:23:24,520 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-02 11:23:24,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-02 11:23:24,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-02 11:23:24,521 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-02 11:23:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:25,223 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-02 11:23:25,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-02 11:23:25,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-02 11:23:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:25,224 INFO L225 Difference]: With dead ends: 44 [2019-10-02 11:23:25,224 INFO L226 Difference]: Without dead ends: 41 [2019-10-02 11:23:25,225 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-02 11:23:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-02 11:23:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-02 11:23:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-02 11:23:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-02 11:23:25,231 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-02 11:23:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:25,231 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-02 11:23:25,231 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-02 11:23:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-02 11:23:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-02 11:23:25,232 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:25,232 INFO L411 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:25,232 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-10-02 11:23:25,233 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:25,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:25,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:25,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:25,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:25,241 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:25,242 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:25,242 INFO L224 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 [2019-10-02 11:23:25,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:25,333 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-02 11:23:25,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:25,336 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-02 11:23:25,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:25,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:25,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:25,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-02 11:23:25,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-02 11:23:25,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-02 11:23:25,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-02 11:23:25,953 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-02 11:23:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:26,743 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-02 11:23:26,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-02 11:23:26,743 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-02 11:23:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:26,744 INFO L225 Difference]: With dead ends: 45 [2019-10-02 11:23:26,744 INFO L226 Difference]: Without dead ends: 42 [2019-10-02 11:23:26,745 INFO L640 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 [2019-10-02 11:23:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-02 11:23:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-02 11:23:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 11:23:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-02 11:23:26,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-02 11:23:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:26,749 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-02 11:23:26,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-02 11:23:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-02 11:23:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-02 11:23:26,750 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:26,750 INFO L411 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:26,750 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-10-02 11:23:26,750 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:26,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:26,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:26,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:26,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:26,759 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:26,759 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:26,759 INFO L224 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 [2019-10-02 11:23:26,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:26,946 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-02 11:23:26,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:26,950 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-02 11:23:26,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:27,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:27,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:27,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-02 11:23:27,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-02 11:23:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-02 11:23:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-02 11:23:27,563 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-02 11:23:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:28,386 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-02 11:23:28,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-02 11:23:28,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-02 11:23:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:28,393 INFO L225 Difference]: With dead ends: 46 [2019-10-02 11:23:28,393 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 11:23:28,394 INFO L640 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 [2019-10-02 11:23:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 11:23:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-02 11:23:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-02 11:23:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-02 11:23:28,406 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-02 11:23:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:28,407 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-02 11:23:28,407 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-02 11:23:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-02 11:23:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-02 11:23:28,407 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:28,407 INFO L411 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:28,408 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-10-02 11:23:28,408 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:28,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:28,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:28,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:28,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:28,422 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:28,422 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:28,422 INFO L224 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) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:28,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:28,518 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-02 11:23:28,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:29,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:29,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:29,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-02 11:23:29,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-02 11:23:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-02 11:23:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-02 11:23:29,205 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-02 11:23:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:30,009 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-02 11:23:30,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-02 11:23:30,010 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-02 11:23:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:30,011 INFO L225 Difference]: With dead ends: 47 [2019-10-02 11:23:30,011 INFO L226 Difference]: Without dead ends: 44 [2019-10-02 11:23:30,012 INFO L640 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 [2019-10-02 11:23:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-02 11:23:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-02 11:23:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 11:23:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-02 11:23:30,017 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-02 11:23:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:30,017 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-02 11:23:30,017 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-02 11:23:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-02 11:23:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:23:30,018 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:30,018 INFO L411 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:30,018 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-10-02 11:23:30,018 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:30,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:30,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:30,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:30,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:30,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:30,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:30,027 INFO L224 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 [2019-10-02 11:23:30,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:30,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:30,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:30,121 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-02 11:23:30,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:30,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:30,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:30,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-02 11:23:30,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-02 11:23:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-02 11:23:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-02 11:23:30,817 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-02 11:23:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:31,719 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-02 11:23:31,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-02 11:23:31,720 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-02 11:23:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:31,721 INFO L225 Difference]: With dead ends: 48 [2019-10-02 11:23:31,721 INFO L226 Difference]: Without dead ends: 45 [2019-10-02 11:23:31,722 INFO L640 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 [2019-10-02 11:23:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-02 11:23:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-02 11:23:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-02 11:23:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-02 11:23:31,727 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-02 11:23:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:31,727 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-02 11:23:31,727 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-02 11:23:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-02 11:23:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-02 11:23:31,728 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:31,728 INFO L411 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:31,728 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:31,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-10-02 11:23:31,728 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:31,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:31,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:31,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:31,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:31,737 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:31,737 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:31,737 INFO L224 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) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:31,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:32,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-02 11:23:32,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:32,929 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-02 11:23:32,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:33,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:23:33,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:33,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-02 11:23:33,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-02 11:23:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-02 11:23:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-02 11:23:33,765 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-02 11:23:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:34,714 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-02 11:23:34,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-02 11:23:34,715 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-02 11:23:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:34,715 INFO L225 Difference]: With dead ends: 49 [2019-10-02 11:23:34,715 INFO L226 Difference]: Without dead ends: 46 [2019-10-02 11:23:34,716 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-10-02 11:23:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-02 11:23:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-02 11:23:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-02 11:23:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-02 11:23:34,721 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-02 11:23:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:34,721 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-02 11:23:34,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-02 11:23:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-02 11:23:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-02 11:23:34,722 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:34,722 INFO L411 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:34,722 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:34,722 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-10-02 11:23:34,722 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:34,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:34,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:34,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:34,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:34,735 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:34,736 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:34,736 INFO L224 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) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:34,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:35,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:35,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:35,085 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-02 11:23:35,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:35,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:35,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:35,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-02 11:23:35,850 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-02 11:23:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-02 11:23:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-02 11:23:35,852 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-02 11:23:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:36,868 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-02 11:23:36,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-02 11:23:36,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-02 11:23:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:36,869 INFO L225 Difference]: With dead ends: 50 [2019-10-02 11:23:36,869 INFO L226 Difference]: Without dead ends: 47 [2019-10-02 11:23:36,870 INFO L640 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 [2019-10-02 11:23:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-02 11:23:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-02 11:23:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-02 11:23:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-02 11:23:36,875 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-02 11:23:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:36,875 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-02 11:23:36,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-02 11:23:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-02 11:23:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-02 11:23:36,876 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:36,876 INFO L411 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:36,876 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-10-02 11:23:36,876 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:36,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:36,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:36,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:36,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:36,885 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:36,885 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:36,885 INFO L224 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) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:36,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:37,015 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-02 11:23:37,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:37,018 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-02 11:23:37,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:37,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:37,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:37,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-02 11:23:37,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-02 11:23:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-02 11:23:37,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-02 11:23:37,822 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-02 11:23:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:38,899 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-02 11:23:38,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-02 11:23:38,899 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-02 11:23:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:38,900 INFO L225 Difference]: With dead ends: 51 [2019-10-02 11:23:38,900 INFO L226 Difference]: Without dead ends: 48 [2019-10-02 11:23:38,901 INFO L640 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 [2019-10-02 11:23:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-02 11:23:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-02 11:23:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 11:23:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-02 11:23:38,906 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-02 11:23:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:38,907 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-02 11:23:38,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-02 11:23:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-02 11:23:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-02 11:23:38,907 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:38,908 INFO L411 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:38,908 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:38,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-10-02 11:23:38,908 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:38,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:38,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:38,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:38,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:38,916 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:38,917 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:38,917 INFO L224 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 [2019-10-02 11:23:38,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:39,164 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-02 11:23:39,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:39,167 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-02 11:23:39,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:39,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:39,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:39,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-02 11:23:39,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-02 11:23:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-02 11:23:39,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-02 11:23:39,982 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-02 11:23:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:41,022 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-02 11:23:41,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-02 11:23:41,023 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-02 11:23:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:41,023 INFO L225 Difference]: With dead ends: 52 [2019-10-02 11:23:41,024 INFO L226 Difference]: Without dead ends: 49 [2019-10-02 11:23:41,024 INFO L640 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 [2019-10-02 11:23:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-02 11:23:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-02 11:23:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-02 11:23:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-02 11:23:41,029 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-02 11:23:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:41,029 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-02 11:23:41,029 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-02 11:23:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-02 11:23:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-02 11:23:41,030 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:41,030 INFO L411 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:41,030 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:41,030 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-10-02 11:23:41,030 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:41,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:41,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:41,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:41,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:41,039 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:41,039 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:41,040 INFO L224 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 [2019-10-02 11:23:41,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:41,192 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-02 11:23:41,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:42,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:42,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:42,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-02 11:23:42,272 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-02 11:23:42,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-02 11:23:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 11:23:42,273 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-02 11:23:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:43,420 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-02 11:23:43,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-02 11:23:43,421 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-02 11:23:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:43,422 INFO L225 Difference]: With dead ends: 53 [2019-10-02 11:23:43,422 INFO L226 Difference]: Without dead ends: 50 [2019-10-02 11:23:43,423 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-02 11:23:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-02 11:23:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-02 11:23:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-02 11:23:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-02 11:23:43,428 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-02 11:23:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:43,428 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-02 11:23:43,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-02 11:23:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-02 11:23:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-02 11:23:43,429 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:43,429 INFO L411 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:43,429 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-10-02 11:23:43,430 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:43,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:43,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:43,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:43,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:43,438 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:43,438 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:43,439 INFO L224 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 [2019-10-02 11:23:43,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:43,550 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:43,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:43,552 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-02 11:23:43,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:44,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:44,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:44,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-02 11:23:44,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-02 11:23:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-02 11:23:44,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-02 11:23:44,492 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-10-02 11:23:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:45,719 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-02 11:23:45,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-02 11:23:45,720 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-10-02 11:23:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:45,720 INFO L225 Difference]: With dead ends: 54 [2019-10-02 11:23:45,720 INFO L226 Difference]: Without dead ends: 51 [2019-10-02 11:23:45,721 INFO L640 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 [2019-10-02 11:23:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-02 11:23:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-02 11:23:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-02 11:23:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-10-02 11:23:45,726 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-10-02 11:23:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:45,726 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-10-02 11:23:45,726 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-02 11:23:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-10-02 11:23:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-02 11:23:45,726 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:45,727 INFO L411 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:45,727 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-10-02 11:23:45,727 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:45,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:45,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:45,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:45,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:45,736 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:45,736 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:45,736 INFO L224 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 [2019-10-02 11:23:45,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:47,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-10-02 11:23:47,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:47,110 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-10-02 11:23:47,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:47,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:48,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:48,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-10-02 11:23:48,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-02 11:23:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-02 11:23:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-10-02 11:23:48,041 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-10-02 11:23:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:49,295 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-10-02 11:23:49,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-02 11:23:49,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-10-02 11:23:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:49,296 INFO L225 Difference]: With dead ends: 55 [2019-10-02 11:23:49,296 INFO L226 Difference]: Without dead ends: 52 [2019-10-02 11:23:49,297 INFO L640 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 [2019-10-02 11:23:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-02 11:23:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-02 11:23:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-02 11:23:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-10-02 11:23:49,303 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-10-02 11:23:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:49,303 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-10-02 11:23:49,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-02 11:23:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-10-02 11:23:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-02 11:23:49,304 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:49,304 INFO L411 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:49,304 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-10-02 11:23:49,305 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:49,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:49,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:49,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:49,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:49,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:49,313 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:49,313 INFO L224 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 [2019-10-02 11:23:49,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:49,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:49,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:49,720 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-10-02 11:23:49,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:50,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:50,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:50,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-10-02 11:23:50,688 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-02 11:23:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-02 11:23:50,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-10-02 11:23:50,688 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-10-02 11:23:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:51,963 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-10-02 11:23:51,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-02 11:23:51,963 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-10-02 11:23:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:51,964 INFO L225 Difference]: With dead ends: 56 [2019-10-02 11:23:51,965 INFO L226 Difference]: Without dead ends: 53 [2019-10-02 11:23:51,966 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-10-02 11:23:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-02 11:23:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-02 11:23:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-02 11:23:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-10-02 11:23:51,971 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-10-02 11:23:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:51,972 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-10-02 11:23:51,972 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-02 11:23:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-10-02 11:23:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-02 11:23:51,972 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:51,972 INFO L411 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:51,973 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-10-02 11:23:51,973 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:51,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:51,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:51,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:51,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:51,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:51,981 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:51,982 INFO L224 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 [2019-10-02 11:23:52,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:52,197 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-10-02 11:23:52,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:52,201 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-10-02 11:23:52,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:53,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:53,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:53,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-10-02 11:23:53,234 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-02 11:23:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-02 11:23:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-10-02 11:23:53,236 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-10-02 11:23:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:54,639 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-10-02 11:23:54,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-02 11:23:54,640 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-10-02 11:23:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:54,641 INFO L225 Difference]: With dead ends: 57 [2019-10-02 11:23:54,641 INFO L226 Difference]: Without dead ends: 54 [2019-10-02 11:23:54,642 INFO L640 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 [2019-10-02 11:23:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-02 11:23:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-02 11:23:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-02 11:23:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-10-02 11:23:54,647 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-10-02 11:23:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:54,647 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-10-02 11:23:54,647 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-02 11:23:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-10-02 11:23:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-02 11:23:54,648 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:54,648 INFO L411 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:54,648 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-10-02 11:23:54,648 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:54,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:54,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:54,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:54,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:54,656 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:54,656 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:54,656 INFO L224 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 [2019-10-02 11:23:54,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:55,177 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-10-02 11:23:55,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:55,181 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-10-02 11:23:55,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:56,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:56,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:56,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-10-02 11:23:56,213 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-02 11:23:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-02 11:23:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-10-02 11:23:56,214 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-10-02 11:23:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:57,681 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-10-02 11:23:57,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-02 11:23:57,681 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-10-02 11:23:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:57,682 INFO L225 Difference]: With dead ends: 58 [2019-10-02 11:23:57,682 INFO L226 Difference]: Without dead ends: 55 [2019-10-02 11:23:57,683 INFO L640 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 [2019-10-02 11:23:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-02 11:23:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-02 11:23:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-02 11:23:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-10-02 11:23:57,690 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-10-02 11:23:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:57,690 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-10-02 11:23:57,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-02 11:23:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-10-02 11:23:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-02 11:23:57,691 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:57,691 INFO L411 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:57,691 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-10-02 11:23:57,692 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:57,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:57,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:57,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:57,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:57,700 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:57,700 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:57,700 INFO L224 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) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:57,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:57,843 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-10-02 11:23:57,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:58,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:58,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:58,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-10-02 11:23:58,983 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-02 11:23:58,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-02 11:23:58,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-10-02 11:23:58,984 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-10-02 11:24:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:00,598 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-10-02 11:24:00,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-02 11:24:00,599 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-10-02 11:24:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:00,599 INFO L225 Difference]: With dead ends: 59 [2019-10-02 11:24:00,599 INFO L226 Difference]: Without dead ends: 56 [2019-10-02 11:24:00,600 INFO L640 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 [2019-10-02 11:24:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-02 11:24:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-02 11:24:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-02 11:24:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-10-02 11:24:00,606 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-10-02 11:24:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:00,606 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-10-02 11:24:00,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-02 11:24:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-10-02 11:24:00,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-02 11:24:00,606 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:00,606 INFO L411 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:00,607 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:00,607 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-10-02 11:24:00,607 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:00,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:00,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:00,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:00,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:00,614 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:00,614 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:00,614 INFO L224 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 [2019-10-02 11:24:00,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:24:00,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:24:00,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:00,751 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-10-02 11:24:00,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:02,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:02,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:02,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-10-02 11:24:02,252 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-02 11:24:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-02 11:24:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-10-02 11:24:02,252 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-10-02 11:24:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:03,846 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-10-02 11:24:03,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-02 11:24:03,846 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-10-02 11:24:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:03,847 INFO L225 Difference]: With dead ends: 60 [2019-10-02 11:24:03,847 INFO L226 Difference]: Without dead ends: 57 [2019-10-02 11:24:03,847 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 11:24:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-02 11:24:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-02 11:24:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-02 11:24:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-02 11:24:03,853 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-10-02 11:24:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:03,854 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-02 11:24:03,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-02 11:24:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-02 11:24:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-02 11:24:03,854 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:03,854 INFO L411 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:03,854 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-10-02 11:24:03,855 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:03,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:03,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:03,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:03,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:03,865 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:03,865 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:03,865 INFO L224 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 [2019-10-02 11:24:03,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:24:06,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-02 11:24:06,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:06,322 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-10-02 11:24:06,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:07,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:07,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:07,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-10-02 11:24:07,579 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-02 11:24:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-02 11:24:07,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 11:24:07,580 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-10-02 11:24:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:09,217 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-10-02 11:24:09,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-02 11:24:09,217 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-10-02 11:24:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:09,218 INFO L225 Difference]: With dead ends: 61 [2019-10-02 11:24:09,218 INFO L226 Difference]: Without dead ends: 58 [2019-10-02 11:24:09,218 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-10-02 11:24:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-02 11:24:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-02 11:24:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-02 11:24:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-10-02 11:24:09,224 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-10-02 11:24:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:09,224 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-10-02 11:24:09,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-02 11:24:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-10-02 11:24:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-02 11:24:09,225 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:09,225 INFO L411 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:09,225 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:09,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-10-02 11:24:09,226 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:09,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:09,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:09,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:09,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:09,233 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:09,234 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:09,234 INFO L224 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) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:09,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:24:09,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:24:09,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:09,755 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-10-02 11:24:09,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:10,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:10,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:10,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-10-02 11:24:10,994 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-02 11:24:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-02 11:24:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-10-02 11:24:10,995 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-10-02 11:24:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:12,646 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-10-02 11:24:12,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-10-02 11:24:12,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-10-02 11:24:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:12,647 INFO L225 Difference]: With dead ends: 62 [2019-10-02 11:24:12,648 INFO L226 Difference]: Without dead ends: 59 [2019-10-02 11:24:12,648 INFO L640 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 [2019-10-02 11:24:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-02 11:24:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-02 11:24:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-02 11:24:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-10-02 11:24:12,654 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-10-02 11:24:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:12,654 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-10-02 11:24:12,654 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-02 11:24:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-10-02 11:24:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-02 11:24:12,654 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:12,655 INFO L411 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:12,655 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:12,655 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-10-02 11:24:12,655 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:12,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:12,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:12,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:12,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:12,662 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:12,662 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:12,662 INFO L224 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 [2019-10-02 11:24:12,724 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:24:12,863 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-10-02 11:24:12,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:12,867 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-10-02 11:24:12,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:14,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:14,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:14,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-10-02 11:24:14,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-02 11:24:14,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-02 11:24:14,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-10-02 11:24:14,154 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-10-02 11:24:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:15,947 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-10-02 11:24:15,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-10-02 11:24:15,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-10-02 11:24:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:15,949 INFO L225 Difference]: With dead ends: 63 [2019-10-02 11:24:15,949 INFO L226 Difference]: Without dead ends: 60 [2019-10-02 11:24:15,950 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-10-02 11:24:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-02 11:24:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-02 11:24:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-02 11:24:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-10-02 11:24:15,957 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-10-02 11:24:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:15,957 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-10-02 11:24:15,957 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-02 11:24:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-10-02 11:24:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-02 11:24:15,958 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:15,958 INFO L411 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:15,958 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-10-02 11:24:15,958 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:15,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:15,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:15,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:15,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:15,967 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:15,967 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:15,968 INFO L224 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 [2019-10-02 11:24:16,042 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:24:16,669 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-02 11:24:16,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:16,673 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-10-02 11:24:16,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:17,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:18,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:18,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-10-02 11:24:18,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-02 11:24:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-02 11:24:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-10-02 11:24:18,022 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-10-02 11:24:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:19,835 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-10-02 11:24:19,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-02 11:24:19,836 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-10-02 11:24:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:19,837 INFO L225 Difference]: With dead ends: 64 [2019-10-02 11:24:19,837 INFO L226 Difference]: Without dead ends: 61 [2019-10-02 11:24:19,838 INFO L640 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 [2019-10-02 11:24:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-02 11:24:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-02 11:24:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-02 11:24:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-10-02 11:24:19,845 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-10-02 11:24:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:19,845 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-10-02 11:24:19,845 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-02 11:24:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-10-02 11:24:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-02 11:24:19,846 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:19,846 INFO L411 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:19,847 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-10-02 11:24:19,847 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:19,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:19,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:19,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:19,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:19,856 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:19,856 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:19,856 INFO L224 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) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:19,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:20,037 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-10-02 11:24:20,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:21,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:21,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:21,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-10-02 11:24:21,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-02 11:24:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-02 11:24:21,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-10-02 11:24:21,429 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-10-02 11:24:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:23,389 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-10-02 11:24:23,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-02 11:24:23,389 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-10-02 11:24:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:23,390 INFO L225 Difference]: With dead ends: 65 [2019-10-02 11:24:23,390 INFO L226 Difference]: Without dead ends: 62 [2019-10-02 11:24:23,391 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-10-02 11:24:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-02 11:24:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-02 11:24:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-02 11:24:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-10-02 11:24:23,397 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-10-02 11:24:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:23,397 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-10-02 11:24:23,398 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-02 11:24:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-10-02 11:24:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 11:24:23,398 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:23,398 INFO L411 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:23,398 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-10-02 11:24:23,399 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:23,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:23,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:23,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:23,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:23,418 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:23,418 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:23,418 INFO L224 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 [2019-10-02 11:24:23,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:24:23,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:24:23,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:23,601 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-10-02 11:24:23,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:24,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:25,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:25,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-10-02 11:24:25,044 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-02 11:24:25,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-02 11:24:25,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-10-02 11:24:25,045 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-10-02 11:24:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:27,063 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-10-02 11:24:27,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-02 11:24:27,063 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-10-02 11:24:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:27,065 INFO L225 Difference]: With dead ends: 66 [2019-10-02 11:24:27,065 INFO L226 Difference]: Without dead ends: 63 [2019-10-02 11:24:27,065 INFO L640 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 [2019-10-02 11:24:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-02 11:24:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-02 11:24:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-02 11:24:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-10-02 11:24:27,072 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-10-02 11:24:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:27,072 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-10-02 11:24:27,072 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-02 11:24:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-10-02 11:24:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-02 11:24:27,073 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:27,073 INFO L411 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:27,073 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-10-02 11:24:27,074 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:27,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:27,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:27,082 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:27,082 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:27,082 INFO L224 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) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:27,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:24:31,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-10-02 11:24:31,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:31,351 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-10-02 11:24:31,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:32,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:32,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:32,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-10-02 11:24:32,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-02 11:24:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-02 11:24:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-10-02 11:24:32,890 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-10-02 11:24:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:34,991 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-10-02 11:24:34,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-02 11:24:34,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-10-02 11:24:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:34,992 INFO L225 Difference]: With dead ends: 67 [2019-10-02 11:24:34,992 INFO L226 Difference]: Without dead ends: 64 [2019-10-02 11:24:34,993 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-10-02 11:24:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-02 11:24:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-02 11:24:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-02 11:24:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-10-02 11:24:35,000 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-10-02 11:24:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:35,000 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-10-02 11:24:35,001 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-02 11:24:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-10-02 11:24:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-02 11:24:35,001 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:35,001 INFO L411 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:35,001 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-10-02 11:24:35,002 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:35,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:35,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:35,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:35,011 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:35,011 INFO L224 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 [2019-10-02 11:24:35,128 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:24:35,893 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:24:35,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:35,897 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-10-02 11:24:35,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:37,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:37,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:37,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-10-02 11:24:37,432 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-02 11:24:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-02 11:24:37,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-10-02 11:24:37,433 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-10-02 11:24:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:39,582 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-10-02 11:24:39,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-02 11:24:39,583 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-10-02 11:24:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:39,583 INFO L225 Difference]: With dead ends: 68 [2019-10-02 11:24:39,583 INFO L226 Difference]: Without dead ends: 65 [2019-10-02 11:24:39,584 INFO L640 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 [2019-10-02 11:24:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-02 11:24:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-02 11:24:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-02 11:24:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-10-02 11:24:39,589 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-10-02 11:24:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:39,589 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-10-02 11:24:39,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-02 11:24:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-10-02 11:24:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-02 11:24:39,590 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:39,590 INFO L411 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:39,590 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:39,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-10-02 11:24:39,591 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:39,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:39,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:39,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:39,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:39,600 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:39,601 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:39,601 INFO L224 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) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:39,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:24:39,840 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-10-02 11:24:39,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:39,845 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-10-02 11:24:39,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:41,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:41,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:41,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-10-02 11:24:41,400 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-10-02 11:24:41,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-10-02 11:24:41,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-10-02 11:24:41,400 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-10-02 11:24:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:43,657 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-10-02 11:24:43,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-02 11:24:43,658 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-10-02 11:24:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:43,658 INFO L225 Difference]: With dead ends: 69 [2019-10-02 11:24:43,658 INFO L226 Difference]: Without dead ends: 66 [2019-10-02 11:24:43,659 INFO L640 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 [2019-10-02 11:24:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-02 11:24:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-02 11:24:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-02 11:24:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-10-02 11:24:43,665 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-10-02 11:24:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:43,665 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-10-02 11:24:43,665 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-10-02 11:24:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-10-02 11:24:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-02 11:24:43,666 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:43,666 INFO L411 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:43,666 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-10-02 11:24:43,667 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:43,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:43,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:43,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:43,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:43,675 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:43,676 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:43,676 INFO L224 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 [2019-10-02 11:24:43,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:24:44,989 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-10-02 11:24:44,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:44,995 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-10-02 11:24:44,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:46,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:46,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:46,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-10-02 11:24:46,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-02 11:24:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-02 11:24:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-10-02 11:24:46,669 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-10-02 11:24:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:49,184 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-10-02 11:24:49,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-02 11:24:49,184 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-10-02 11:24:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:49,185 INFO L225 Difference]: With dead ends: 70 [2019-10-02 11:24:49,185 INFO L226 Difference]: Without dead ends: 67 [2019-10-02 11:24:49,185 INFO L640 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 [2019-10-02 11:24:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-02 11:24:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-02 11:24:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-02 11:24:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-10-02 11:24:49,191 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-10-02 11:24:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:49,191 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-10-02 11:24:49,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-02 11:24:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-10-02 11:24:49,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-02 11:24:49,192 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:49,192 INFO L411 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:49,192 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:49,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-10-02 11:24:49,193 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:49,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:49,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:49,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:49,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:49,202 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:49,202 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:49,202 INFO L224 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 [2019-10-02 11:24:49,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:49,424 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-10-02 11:24:49,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:51,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:51,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:51,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-10-02 11:24:51,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-02 11:24:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-02 11:24:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-10-02 11:24:51,429 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-10-02 11:24:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:53,986 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-10-02 11:24:53,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-02 11:24:53,986 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-10-02 11:24:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:53,987 INFO L225 Difference]: With dead ends: 71 [2019-10-02 11:24:53,987 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 11:24:53,987 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-10-02 11:24:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 11:24:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-02 11:24:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-02 11:24:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-10-02 11:24:53,993 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-10-02 11:24:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:53,993 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-10-02 11:24:53,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-02 11:24:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-10-02 11:24:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-02 11:24:53,994 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:53,994 INFO L411 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:53,994 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-10-02 11:24:53,995 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:53,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:53,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:53,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:53,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:54,004 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:54,004 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:54,004 INFO L224 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 [2019-10-02 11:24:54,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:24:54,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:24:54,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:54,346 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-10-02 11:24:54,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:56,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:56,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:56,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-10-02 11:24:56,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-10-02 11:24:56,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-10-02 11:24:56,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-10-02 11:24:56,463 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-10-02 11:24:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:59,024 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-10-02 11:24:59,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-02 11:24:59,024 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-10-02 11:24:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:59,025 INFO L225 Difference]: With dead ends: 72 [2019-10-02 11:24:59,025 INFO L226 Difference]: Without dead ends: 69 [2019-10-02 11:24:59,025 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-10-02 11:24:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-02 11:24:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-10-02 11:24:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-02 11:24:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-10-02 11:24:59,032 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-10-02 11:24:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:59,033 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-10-02 11:24:59,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-10-02 11:24:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-10-02 11:24:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-02 11:24:59,033 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:59,033 INFO L411 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:59,034 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-10-02 11:24:59,034 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:59,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:59,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:59,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:59,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:59,042 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:59,042 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:59,042 INFO L224 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) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:59,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:25:06,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-10-02 11:25:06,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:06,262 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-10-02 11:25:06,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:08,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:08,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:08,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-10-02 11:25:08,104 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-02 11:25:08,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-02 11:25:08,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-10-02 11:25:08,105 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-10-02 11:25:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:10,728 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-10-02 11:25:10,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-02 11:25:10,728 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-10-02 11:25:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:10,730 INFO L225 Difference]: With dead ends: 73 [2019-10-02 11:25:10,730 INFO L226 Difference]: Without dead ends: 70 [2019-10-02 11:25:10,730 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-10-02 11:25:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-02 11:25:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-02 11:25:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-02 11:25:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-10-02 11:25:10,737 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-10-02 11:25:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:10,738 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-10-02 11:25:10,738 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-02 11:25:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-10-02 11:25:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-02 11:25:10,738 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:10,738 INFO L411 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:10,739 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:10,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-10-02 11:25:10,739 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:10,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:10,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:10,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:10,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:10,748 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:10,748 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:10,748 INFO L224 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 [2019-10-02 11:25:10,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:25:11,467 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:25:11,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:11,471 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-10-02 11:25:11,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:13,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:13,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:13,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-10-02 11:25:13,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-10-02 11:25:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-10-02 11:25:13,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-10-02 11:25:13,333 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-10-02 11:25:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:16,096 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-10-02 11:25:16,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-10-02 11:25:16,096 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-10-02 11:25:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:16,097 INFO L225 Difference]: With dead ends: 74 [2019-10-02 11:25:16,097 INFO L226 Difference]: Without dead ends: 71 [2019-10-02 11:25:16,097 INFO L640 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 [2019-10-02 11:25:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-02 11:25:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-02 11:25:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-02 11:25:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-10-02 11:25:16,103 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-10-02 11:25:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:16,104 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-10-02 11:25:16,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-10-02 11:25:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-10-02 11:25:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-02 11:25:16,104 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:16,104 INFO L411 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:16,104 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-10-02 11:25:16,105 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:16,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:16,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:16,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:16,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:16,113 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:16,114 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:16,114 INFO L224 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) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:16,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:25:16,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-10-02 11:25:16,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:16,407 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-10-02 11:25:16,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:18,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:18,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:18,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-10-02 11:25:18,338 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-10-02 11:25:18,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-10-02 11:25:18,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-10-02 11:25:18,339 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-10-02 11:25:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:21,169 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-10-02 11:25:21,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-10-02 11:25:21,169 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-10-02 11:25:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:21,170 INFO L225 Difference]: With dead ends: 75 [2019-10-02 11:25:21,170 INFO L226 Difference]: Without dead ends: 72 [2019-10-02 11:25:21,171 INFO L640 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 [2019-10-02 11:25:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-02 11:25:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-02 11:25:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-02 11:25:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-10-02 11:25:21,177 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-10-02 11:25:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:21,177 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-10-02 11:25:21,177 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-10-02 11:25:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-10-02 11:25:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-02 11:25:21,178 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:21,178 INFO L411 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:21,178 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:21,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:21,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-10-02 11:25:21,178 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:21,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:21,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:21,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:21,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:21,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:21,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:21,189 INFO L224 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) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:21,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:25:23,015 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-02 11:25:23,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:23,023 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-10-02 11:25:23,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:24,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:25,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:25,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-10-02 11:25:25,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-10-02 11:25:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-10-02 11:25:25,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-10-02 11:25:25,030 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-10-02 11:25:27,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:27,980 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-10-02 11:25:27,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-02 11:25:27,981 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-10-02 11:25:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:27,981 INFO L225 Difference]: With dead ends: 76 [2019-10-02 11:25:27,981 INFO L226 Difference]: Without dead ends: 73 [2019-10-02 11:25:27,982 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-10-02 11:25:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-02 11:25:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-10-02 11:25:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-02 11:25:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-10-02 11:25:27,990 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-10-02 11:25:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:27,990 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-10-02 11:25:27,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-10-02 11:25:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-10-02 11:25:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 11:25:27,991 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:27,991 INFO L411 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:27,992 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-10-02 11:25:27,992 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:27,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:27,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:28,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:28,001 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:28,001 INFO L224 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) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:28,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:25:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:25:28,245 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-10-02 11:25:28,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:30,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:30,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:30,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-10-02 11:25:30,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-02 11:25:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-02 11:25:30,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-10-02 11:25:30,346 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-10-02 11:25:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:33,431 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-10-02 11:25:33,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-10-02 11:25:33,431 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-10-02 11:25:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:33,432 INFO L225 Difference]: With dead ends: 77 [2019-10-02 11:25:33,432 INFO L226 Difference]: Without dead ends: 74 [2019-10-02 11:25:33,432 INFO L640 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 [2019-10-02 11:25:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-02 11:25:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-10-02 11:25:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-02 11:25:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-10-02 11:25:33,440 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-10-02 11:25:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:33,440 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-10-02 11:25:33,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-02 11:25:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-10-02 11:25:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-02 11:25:33,441 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:33,441 INFO L411 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:33,441 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-10-02 11:25:33,442 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:33,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:33,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:33,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:25:33,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:33,450 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:33,450 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:33,450 INFO L224 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 [2019-10-02 11:25:33,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:25:33,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:25:33,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:33,908 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-10-02 11:25:33,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:36,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:36,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:36,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-10-02 11:25:36,290 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-10-02 11:25:36,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-10-02 11:25:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-10-02 11:25:36,291 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-10-02 11:25:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:39,387 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-10-02 11:25:39,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-02 11:25:39,387 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-10-02 11:25:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:39,388 INFO L225 Difference]: With dead ends: 78 [2019-10-02 11:25:39,388 INFO L226 Difference]: Without dead ends: 75 [2019-10-02 11:25:39,388 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-10-02 11:25:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-02 11:25:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-10-02 11:25:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-02 11:25:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-10-02 11:25:39,396 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-10-02 11:25:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:39,396 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-10-02 11:25:39,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-10-02 11:25:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-10-02 11:25:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-02 11:25:39,397 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:39,397 INFO L411 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:39,398 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-10-02 11:25:39,398 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:39,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:39,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:39,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:39,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:39,408 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:39,408 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:39,408 INFO L224 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 [2019-10-02 11:25:39,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:25:51,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-10-02 11:25:51,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:51,260 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-10-02 11:25:51,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:53,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:53,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:53,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-10-02 11:25:53,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-10-02 11:25:53,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-10-02 11:25:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-10-02 11:25:53,501 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-10-02 11:25:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:56,739 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-10-02 11:25:56,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-02 11:25:56,739 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-10-02 11:25:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:56,740 INFO L225 Difference]: With dead ends: 79 [2019-10-02 11:25:56,740 INFO L226 Difference]: Without dead ends: 76 [2019-10-02 11:25:56,740 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-10-02 11:25:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-02 11:25:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-02 11:25:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-02 11:25:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-10-02 11:25:56,749 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-10-02 11:25:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:56,749 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-10-02 11:25:56,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-10-02 11:25:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-10-02 11:25:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-02 11:25:56,750 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:56,750 INFO L411 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:56,751 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-10-02 11:25:56,751 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:56,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:56,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:56,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:56,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:56,774 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:56,774 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:56,774 INFO L224 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) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:56,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:25:57,636 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:25:57,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:57,641 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-10-02 11:25:57,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:59,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:59,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:59,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-10-02 11:25:59,867 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-02 11:25:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-02 11:25:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-10-02 11:25:59,868 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-10-02 11:26:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:03,176 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-10-02 11:26:03,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-02 11:26:03,176 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-10-02 11:26:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:03,178 INFO L225 Difference]: With dead ends: 80 [2019-10-02 11:26:03,178 INFO L226 Difference]: Without dead ends: 77 [2019-10-02 11:26:03,179 INFO L640 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 [2019-10-02 11:26:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-02 11:26:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-10-02 11:26:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-02 11:26:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-10-02 11:26:03,187 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-10-02 11:26:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:03,187 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-10-02 11:26:03,187 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-02 11:26:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-10-02 11:26:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-02 11:26:03,188 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:03,188 INFO L411 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:03,188 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:03,189 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-10-02 11:26:03,189 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:03,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:03,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:03,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:03,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:03,199 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:03,199 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:03,199 INFO L224 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 [2019-10-02 11:26:03,320 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:26:03,688 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-10-02 11:26:03,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:03,693 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-10-02 11:26:03,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:06,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:06,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:06,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-10-02 11:26:06,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-02 11:26:06,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-02 11:26:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-10-02 11:26:06,111 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-10-02 11:26:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:09,568 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-10-02 11:26:09,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-02 11:26:09,568 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-10-02 11:26:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:09,569 INFO L225 Difference]: With dead ends: 81 [2019-10-02 11:26:09,569 INFO L226 Difference]: Without dead ends: 78 [2019-10-02 11:26:09,569 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-10-02 11:26:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-02 11:26:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-10-02 11:26:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-02 11:26:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-10-02 11:26:09,576 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-10-02 11:26:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:09,576 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-10-02 11:26:09,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-02 11:26:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-10-02 11:26:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-02 11:26:09,577 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:09,577 INFO L411 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:09,577 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-10-02 11:26:09,577 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:09,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:09,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:09,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:09,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:09,586 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:09,586 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:09,586 INFO L224 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) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:09,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:26:12,682 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-10-02 11:26:12,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:12,687 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-10-02 11:26:12,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:14,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:15,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:15,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-10-02 11:26:15,064 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-02 11:26:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-02 11:26:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-10-02 11:26:15,065 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-10-02 11:26:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:18,575 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-10-02 11:26:18,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-10-02 11:26:18,576 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-10-02 11:26:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:18,577 INFO L225 Difference]: With dead ends: 82 [2019-10-02 11:26:18,577 INFO L226 Difference]: Without dead ends: 79 [2019-10-02 11:26:18,577 INFO L640 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 [2019-10-02 11:26:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-02 11:26:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-02 11:26:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-02 11:26:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-10-02 11:26:18,585 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-10-02 11:26:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:18,586 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-10-02 11:26:18,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-02 11:26:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-10-02 11:26:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-02 11:26:18,587 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:18,587 INFO L411 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:18,587 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:18,587 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-10-02 11:26:18,587 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:18,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:18,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:18,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:18,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:18,596 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:18,596 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:18,596 INFO L224 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) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:18,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:26:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:26:18,909 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-10-02 11:26:18,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:21,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:21,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:21,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-10-02 11:26:21,455 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-10-02 11:26:21,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-10-02 11:26:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-10-02 11:26:21,456 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-10-02 11:26:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:25,029 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-10-02 11:26:25,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-10-02 11:26:25,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-10-02 11:26:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:25,031 INFO L225 Difference]: With dead ends: 83 [2019-10-02 11:26:25,031 INFO L226 Difference]: Without dead ends: 80 [2019-10-02 11:26:25,032 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-10-02 11:26:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-02 11:26:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-02 11:26:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-02 11:26:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-10-02 11:26:25,041 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-10-02 11:26:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:25,042 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-10-02 11:26:25,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-10-02 11:26:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-10-02 11:26:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-02 11:26:25,043 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:25,043 INFO L411 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:25,043 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-10-02 11:26:25,043 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:25,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:25,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:25,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:26:25,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:25,054 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:25,054 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:25,054 INFO L224 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) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:25,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:26:25,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:26:25,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:25,375 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-10-02 11:26:25,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:27,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:27,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:27,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-10-02 11:26:27,875 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-10-02 11:26:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-10-02 11:26:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-10-02 11:26:27,876 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-10-02 11:26:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:31,579 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-10-02 11:26:31,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-10-02 11:26:31,579 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-10-02 11:26:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:31,580 INFO L225 Difference]: With dead ends: 84 [2019-10-02 11:26:31,580 INFO L226 Difference]: Without dead ends: 81 [2019-10-02 11:26:31,581 INFO L640 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 [2019-10-02 11:26:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-02 11:26:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-02 11:26:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-02 11:26:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-10-02 11:26:31,589 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-10-02 11:26:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:31,589 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-10-02 11:26:31,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-10-02 11:26:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-10-02 11:26:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-02 11:26:31,590 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:31,590 INFO L411 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:31,590 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-10-02 11:26:31,591 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:31,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:31,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:31,599 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:31,599 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:31,600 INFO L224 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) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:31,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:26:49,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-10-02 11:26:49,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:49,907 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-10-02 11:26:49,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:52,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:52,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:52,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-10-02 11:26:52,531 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-10-02 11:26:52,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-10-02 11:26:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-10-02 11:26:52,531 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-10-02 11:26:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:56,393 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-10-02 11:26:56,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-10-02 11:26:56,394 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-10-02 11:26:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:56,394 INFO L225 Difference]: With dead ends: 85 [2019-10-02 11:26:56,394 INFO L226 Difference]: Without dead ends: 82 [2019-10-02 11:26:56,395 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-10-02 11:26:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-02 11:26:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-02 11:26:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-02 11:26:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-10-02 11:26:56,402 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-10-02 11:26:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:56,403 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-10-02 11:26:56,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-10-02 11:26:56,403 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-10-02 11:26:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-02 11:26:56,403 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:56,403 INFO L411 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:56,403 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-10-02 11:26:56,404 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:56,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:56,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:56,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:56,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:56,412 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:56,412 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:56,412 INFO L224 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 [2019-10-02 11:26:56,538 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:26:57,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:26:57,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:57,423 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-10-02 11:26:57,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:00,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:00,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:00,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-10-02 11:27:00,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-10-02 11:27:00,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-10-02 11:27:00,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-10-02 11:27:00,101 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-10-02 11:27:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:03,956 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-10-02 11:27:03,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-10-02 11:27:03,957 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-10-02 11:27:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:03,957 INFO L225 Difference]: With dead ends: 86 [2019-10-02 11:27:03,957 INFO L226 Difference]: Without dead ends: 83 [2019-10-02 11:27:03,958 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-10-02 11:27:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-02 11:27:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-02 11:27:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-02 11:27:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-10-02 11:27:03,966 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-10-02 11:27:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:03,967 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-10-02 11:27:03,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-10-02 11:27:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-10-02 11:27:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-02 11:27:03,967 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:03,967 INFO L411 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:03,968 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-10-02 11:27:03,968 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:03,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:03,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:03,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:03,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:03,977 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:03,977 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:03,977 INFO L224 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) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:04,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:27:04,404 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-10-02 11:27:04,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:04,410 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-10-02 11:27:04,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:07,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:07,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:07,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-10-02 11:27:07,185 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-10-02 11:27:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-10-02 11:27:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-10-02 11:27:07,186 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-10-02 11:27:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:11,250 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-10-02 11:27:11,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-10-02 11:27:11,250 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-10-02 11:27:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:11,251 INFO L225 Difference]: With dead ends: 87 [2019-10-02 11:27:11,251 INFO L226 Difference]: Without dead ends: 84 [2019-10-02 11:27:11,252 INFO L640 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 [2019-10-02 11:27:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-02 11:27:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-10-02 11:27:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-02 11:27:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-10-02 11:27:11,259 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-10-02 11:27:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:11,259 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-10-02 11:27:11,259 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-10-02 11:27:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-10-02 11:27:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-02 11:27:11,260 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:11,260 INFO L411 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:11,260 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-10-02 11:27:11,260 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:11,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:11,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:11,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:11,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:11,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:11,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:11,270 INFO L224 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 [2019-10-02 11:27:11,428 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:27:15,330 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-10-02 11:27:15,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:15,336 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-10-02 11:27:15,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:18,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:18,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:18,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-10-02 11:27:18,463 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-10-02 11:27:18,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-10-02 11:27:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-10-02 11:27:18,464 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-10-02 11:27:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:22,636 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-10-02 11:27:22,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-10-02 11:27:22,636 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-10-02 11:27:22,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:22,637 INFO L225 Difference]: With dead ends: 88 [2019-10-02 11:27:22,637 INFO L226 Difference]: Without dead ends: 85 [2019-10-02 11:27:22,638 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-10-02 11:27:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-02 11:27:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-10-02 11:27:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-02 11:27:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-10-02 11:27:22,646 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-10-02 11:27:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:22,646 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-10-02 11:27:22,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-10-02 11:27:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-10-02 11:27:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-02 11:27:22,647 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:22,647 INFO L411 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:22,647 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:22,647 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-10-02 11:27:22,647 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:22,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:22,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:22,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:22,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:22,655 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:22,655 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:22,655 INFO L224 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) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:22,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:27:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:27:23,048 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-10-02 11:27:23,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:25,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:26,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:26,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-10-02 11:27:26,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-10-02 11:27:26,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-10-02 11:27:26,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-10-02 11:27:26,005 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-10-02 11:27:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:30,371 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-10-02 11:27:30,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-10-02 11:27:30,371 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-10-02 11:27:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:30,372 INFO L225 Difference]: With dead ends: 89 [2019-10-02 11:27:30,372 INFO L226 Difference]: Without dead ends: 86 [2019-10-02 11:27:30,373 INFO L640 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 [2019-10-02 11:27:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-02 11:27:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-02 11:27:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-02 11:27:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-10-02 11:27:30,380 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-10-02 11:27:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:30,380 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-10-02 11:27:30,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-10-02 11:27:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-10-02 11:27:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-02 11:27:30,381 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:30,381 INFO L411 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:30,381 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:30,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-10-02 11:27:30,382 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:30,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:30,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:30,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:27:30,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:30,390 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:30,391 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:30,391 INFO L224 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) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:30,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:27:30,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:27:30,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:30,797 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-10-02 11:27:30,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:33,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:33,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:33,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-10-02 11:27:33,756 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-10-02 11:27:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-10-02 11:27:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-10-02 11:27:33,757 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-10-02 11:27:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:38,094 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-10-02 11:27:38,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-10-02 11:27:38,094 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-10-02 11:27:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:38,095 INFO L225 Difference]: With dead ends: 90 [2019-10-02 11:27:38,095 INFO L226 Difference]: Without dead ends: 87 [2019-10-02 11:27:38,096 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-10-02 11:27:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-02 11:27:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-10-02 11:27:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-02 11:27:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-10-02 11:27:38,105 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-10-02 11:27:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:38,105 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-10-02 11:27:38,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-10-02 11:27:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-10-02 11:27:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-02 11:27:38,106 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:38,106 INFO L411 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:38,106 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:38,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-10-02 11:27:38,107 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:38,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:38,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:38,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:38,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:38,116 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:38,116 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:38,116 INFO L224 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 [2019-10-02 11:27:38,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:28:03,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-10-02 11:28:03,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:03,663 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-10-02 11:28:03,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:06,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:06,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:06,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-10-02 11:28:06,690 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-10-02 11:28:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-10-02 11:28:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-10-02 11:28:06,691 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-10-02 11:28:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:11,104 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-10-02 11:28:11,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-10-02 11:28:11,104 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-10-02 11:28:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:11,105 INFO L225 Difference]: With dead ends: 91 [2019-10-02 11:28:11,105 INFO L226 Difference]: Without dead ends: 88 [2019-10-02 11:28:11,106 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-10-02 11:28:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-02 11:28:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-02 11:28:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-02 11:28:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-10-02 11:28:11,113 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-10-02 11:28:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:11,113 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-10-02 11:28:11,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-10-02 11:28:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-10-02 11:28:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-02 11:28:11,114 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:11,114 INFO L411 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:11,114 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-10-02 11:28:11,115 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:11,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:11,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:11,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:11,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:11,124 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:11,124 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:11,124 INFO L224 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 [2019-10-02 11:28:11,272 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:28:12,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:28:12,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:12,304 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-10-02 11:28:12,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:15,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:15,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:15,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-10-02 11:28:15,427 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-10-02 11:28:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-10-02 11:28:15,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-10-02 11:28:15,428 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-10-02 11:28:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:19,986 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-10-02 11:28:19,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-10-02 11:28:19,986 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-10-02 11:28:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:19,987 INFO L225 Difference]: With dead ends: 92 [2019-10-02 11:28:19,987 INFO L226 Difference]: Without dead ends: 89 [2019-10-02 11:28:19,988 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-10-02 11:28:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-02 11:28:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-10-02 11:28:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-02 11:28:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-10-02 11:28:19,995 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-10-02 11:28:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:19,995 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-10-02 11:28:19,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-10-02 11:28:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-10-02 11:28:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-02 11:28:19,996 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:19,996 INFO L411 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:19,996 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-10-02 11:28:19,996 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:19,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:19,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:19,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:19,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:20,006 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:20,006 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:20,007 INFO L224 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 [2019-10-02 11:28:20,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:28:20,539 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-10-02 11:28:20,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:20,545 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-10-02 11:28:20,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:23,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:23,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:23,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-10-02 11:28:23,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-10-02 11:28:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-10-02 11:28:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-10-02 11:28:23,833 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-10-02 11:28:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:28,499 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-10-02 11:28:28,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-10-02 11:28:28,500 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-10-02 11:28:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:28,500 INFO L225 Difference]: With dead ends: 93 [2019-10-02 11:28:28,501 INFO L226 Difference]: Without dead ends: 90 [2019-10-02 11:28:28,501 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-10-02 11:28:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-02 11:28:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-10-02 11:28:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-02 11:28:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-10-02 11:28:28,509 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-10-02 11:28:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:28,510 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-10-02 11:28:28,510 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-10-02 11:28:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-10-02 11:28:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-02 11:28:28,510 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:28,510 INFO L411 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:28,511 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:28,511 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-10-02 11:28:28,511 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:28,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:28,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:28,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:28,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:28,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:28,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:28,518 INFO L224 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 [2019-10-02 11:28:28,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:28:34,637 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-10-02 11:28:34,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:34,648 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-10-02 11:28:34,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:37,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:38,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:38,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-10-02 11:28:38,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-10-02 11:28:38,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-10-02 11:28:38,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-10-02 11:28:38,022 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-10-02 11:28:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:42,822 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-10-02 11:28:42,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-10-02 11:28:42,823 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-10-02 11:28:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:42,823 INFO L225 Difference]: With dead ends: 94 [2019-10-02 11:28:42,823 INFO L226 Difference]: Without dead ends: 91 [2019-10-02 11:28:42,824 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-10-02 11:28:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-02 11:28:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-02 11:28:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-02 11:28:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-10-02 11:28:42,831 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-10-02 11:28:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:42,831 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-10-02 11:28:42,831 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-10-02 11:28:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-10-02 11:28:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-02 11:28:42,832 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:42,832 INFO L411 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:42,832 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-10-02 11:28:42,833 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:42,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:42,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:42,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:42,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:42,842 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:42,843 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:42,843 INFO L224 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 [2019-10-02 11:28:43,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:28:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:28:43,398 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-10-02 11:28:43,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:46,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:46,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:46,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-10-02 11:28:46,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-10-02 11:28:46,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-10-02 11:28:46,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-10-02 11:28:46,622 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-10-02 11:28:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:51,470 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-10-02 11:28:51,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-10-02 11:28:51,470 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-10-02 11:28:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:51,471 INFO L225 Difference]: With dead ends: 95 [2019-10-02 11:28:51,471 INFO L226 Difference]: Without dead ends: 92 [2019-10-02 11:28:51,472 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-10-02 11:28:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-02 11:28:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-10-02 11:28:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-02 11:28:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-10-02 11:28:51,478 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-10-02 11:28:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:51,479 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-10-02 11:28:51,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-10-02 11:28:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-10-02 11:28:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-02 11:28:51,479 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:51,479 INFO L411 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:51,480 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:51,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-10-02 11:28:51,480 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:51,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:51,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:51,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:28:51,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:51,488 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:51,488 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:51,488 INFO L224 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 [2019-10-02 11:28:51,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:28:51,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:28:51,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:51,944 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-10-02 11:28:51,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:55,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:55,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:55,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-10-02 11:28:55,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-10-02 11:28:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-10-02 11:28:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-10-02 11:28:55,274 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-10-02 11:29:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:00,285 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-10-02 11:29:00,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-10-02 11:29:00,286 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-10-02 11:29:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:00,287 INFO L225 Difference]: With dead ends: 96 [2019-10-02 11:29:00,287 INFO L226 Difference]: Without dead ends: 93 [2019-10-02 11:29:00,288 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-10-02 11:29:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-02 11:29:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-10-02 11:29:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-02 11:29:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-10-02 11:29:00,296 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-10-02 11:29:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:00,296 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-10-02 11:29:00,296 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-10-02 11:29:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-10-02 11:29:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-02 11:29:00,297 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:00,297 INFO L411 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:00,297 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-10-02 11:29:00,297 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:00,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:00,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:00,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:00,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:00,305 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:00,305 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:00,305 INFO L224 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 [2019-10-02 11:29:00,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:29:37,064 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-10-02 11:29:37,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:37,073 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-10-02 11:29:37,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:40,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:40,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:40,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-10-02 11:29:40,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-10-02 11:29:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-10-02 11:29:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-10-02 11:29:40,510 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-10-02 11:29:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:45,691 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-10-02 11:29:45,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-10-02 11:29:45,691 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-10-02 11:29:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:45,692 INFO L225 Difference]: With dead ends: 97 [2019-10-02 11:29:45,693 INFO L226 Difference]: Without dead ends: 94 [2019-10-02 11:29:45,693 INFO L640 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 [2019-10-02 11:29:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-02 11:29:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-02 11:29:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-02 11:29:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-10-02 11:29:45,700 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-10-02 11:29:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:45,701 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-10-02 11:29:45,701 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-10-02 11:29:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-10-02 11:29:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-02 11:29:45,701 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:45,701 INFO L411 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:45,701 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-10-02 11:29:45,702 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:45,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:45,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:45,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:45,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:45,710 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:45,710 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:45,711 INFO L224 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 [2019-10-02 11:29:45,890 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:29:47,077 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:29:47,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:47,082 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-10-02 11:29:47,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:50,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:50,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:50,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-10-02 11:29:50,526 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-10-02 11:29:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-10-02 11:29:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-10-02 11:29:50,527 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-10-02 11:29:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:55,757 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-10-02 11:29:55,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-10-02 11:29:55,757 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-10-02 11:29:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:55,757 INFO L225 Difference]: With dead ends: 98 [2019-10-02 11:29:55,758 INFO L226 Difference]: Without dead ends: 95 [2019-10-02 11:29:55,758 INFO L640 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 [2019-10-02 11:29:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-02 11:29:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-10-02 11:29:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-02 11:29:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-10-02 11:29:55,765 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-10-02 11:29:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:55,765 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-10-02 11:29:55,765 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-10-02 11:29:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-10-02 11:29:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-02 11:29:55,766 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:55,766 INFO L411 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:55,766 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:55,766 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-10-02 11:29:55,766 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:55,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:55,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:55,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:55,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:55,774 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:55,774 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:55,774 INFO L224 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 [2019-10-02 11:29:55,947 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:29:56,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-10-02 11:29:56,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:56,392 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-10-02 11:29:56,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:59,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:00,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:00,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-10-02 11:30:00,030 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-10-02 11:30:00,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-10-02 11:30:00,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-10-02 11:30:00,031 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-10-02 11:30:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:05,558 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-10-02 11:30:05,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-10-02 11:30:05,558 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-10-02 11:30:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:05,559 INFO L225 Difference]: With dead ends: 99 [2019-10-02 11:30:05,559 INFO L226 Difference]: Without dead ends: 96 [2019-10-02 11:30:05,560 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-10-02 11:30:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-02 11:30:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-10-02 11:30:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-02 11:30:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-10-02 11:30:05,568 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-10-02 11:30:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:05,569 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-10-02 11:30:05,569 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-10-02 11:30:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-10-02 11:30:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-02 11:30:05,570 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:05,570 INFO L411 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:05,570 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:05,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-10-02 11:30:05,570 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:05,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:05,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:05,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:30:05,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:05,580 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:05,581 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:05,581 INFO L224 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 [2019-10-02 11:30:05,766 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:30:13,224 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-10-02 11:30:13,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:30:13,234 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-10-02 11:30:13,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:30:16,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:16,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:16,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-10-02 11:30:16,902 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-10-02 11:30:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-10-02 11:30:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-10-02 11:30:16,902 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-10-02 11:30:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:22,448 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-10-02 11:30:22,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-10-02 11:30:22,449 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-10-02 11:30:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:22,450 INFO L225 Difference]: With dead ends: 100 [2019-10-02 11:30:22,450 INFO L226 Difference]: Without dead ends: 97 [2019-10-02 11:30:22,450 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-10-02 11:30:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-02 11:30:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-10-02 11:30:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-02 11:30:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-10-02 11:30:22,459 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-10-02 11:30:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:22,459 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-10-02 11:30:22,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-10-02 11:30:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-10-02 11:30:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-02 11:30:22,460 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:22,460 INFO L411 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:22,461 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-10-02 11:30:22,461 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:22,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:22,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:22,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:30:22,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:22,471 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:22,472 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:22,472 INFO L224 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 [2019-10-02 11:30:22,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:30:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:30:23,018 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-10-02 11:30:23,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:30:26,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:26,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:26,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-10-02 11:30:26,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-10-02 11:30:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-10-02 11:30:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-10-02 11:30:26,789 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-10-02 11:30:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:32,414 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-10-02 11:30:32,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-10-02 11:30:32,414 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-10-02 11:30:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:32,415 INFO L225 Difference]: With dead ends: 101 [2019-10-02 11:30:32,415 INFO L226 Difference]: Without dead ends: 98 [2019-10-02 11:30:32,416 INFO L640 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 [2019-10-02 11:30:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-02 11:30:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-10-02 11:30:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-02 11:30:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-10-02 11:30:32,426 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-10-02 11:30:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:32,426 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-10-02 11:30:32,426 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-10-02 11:30:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-10-02 11:30:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-02 11:30:32,427 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:32,427 INFO L411 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:32,427 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-10-02 11:30:32,428 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:32,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:32,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:32,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:30:32,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:32,436 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:32,437 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:32,437 INFO L224 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 [2019-10-02 11:30:32,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:30:32,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:30:32,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:30:32,999 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-10-02 11:30:33,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:30:36,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:36,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:36,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-10-02 11:30:36,791 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-10-02 11:30:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-10-02 11:30:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-10-02 11:30:36,792 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-10-02 11:30:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:42,577 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-10-02 11:30:42,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-10-02 11:30:42,577 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-10-02 11:30:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:42,578 INFO L225 Difference]: With dead ends: 102 [2019-10-02 11:30:42,578 INFO L226 Difference]: Without dead ends: 99 [2019-10-02 11:30:42,579 INFO L640 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 [2019-10-02 11:30:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-02 11:30:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-10-02 11:30:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-02 11:30:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-10-02 11:30:42,586 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-10-02 11:30:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:42,586 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-10-02 11:30:42,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-10-02 11:30:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-10-02 11:30:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-02 11:30:42,586 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:42,586 INFO L411 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:42,587 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-10-02 11:30:42,587 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:42,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:42,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:42,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:30:42,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:42,603 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:42,603 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:42,604 INFO L224 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 [2019-10-02 11:30:42,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:31:34,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-10-02 11:31:34,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:34,386 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-10-02 11:31:34,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:38,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:38,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:38,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-10-02 11:31:38,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-10-02 11:31:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-10-02 11:31:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-10-02 11:31:38,289 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-10-02 11:31:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:44,282 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-10-02 11:31:44,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-10-02 11:31:44,282 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-10-02 11:31:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:44,283 INFO L225 Difference]: With dead ends: 103 [2019-10-02 11:31:44,283 INFO L226 Difference]: Without dead ends: 100 [2019-10-02 11:31:44,284 INFO L640 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 [2019-10-02 11:31:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-02 11:31:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-10-02 11:31:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-02 11:31:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-10-02 11:31:44,292 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-10-02 11:31:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:44,292 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-10-02 11:31:44,292 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-10-02 11:31:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-10-02 11:31:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-02 11:31:44,292 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:44,292 INFO L411 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:44,293 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-10-02 11:31:44,293 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:44,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:44,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:44,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:44,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:44,300 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:44,300 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:44,301 INFO L224 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 [2019-10-02 11:31:44,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:31:45,849 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:31:45,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:45,854 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-10-02 11:31:45,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:49,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:49,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:49,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-10-02 11:31:49,866 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-10-02 11:31:49,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-10-02 11:31:49,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-10-02 11:31:49,867 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-10-02 11:31:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:55,952 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-10-02 11:31:55,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-10-02 11:31:55,952 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-10-02 11:31:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:55,953 INFO L225 Difference]: With dead ends: 104 [2019-10-02 11:31:55,954 INFO L226 Difference]: Without dead ends: 101 [2019-10-02 11:31:55,954 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-10-02 11:31:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-02 11:31:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-10-02 11:31:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-02 11:31:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-10-02 11:31:55,962 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-10-02 11:31:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:55,962 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-10-02 11:31:55,962 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-10-02 11:31:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-10-02 11:31:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-02 11:31:55,963 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:55,963 INFO L411 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:55,963 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:55,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-10-02 11:31:55,963 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:55,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:55,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:55,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:55,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:55,972 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:55,972 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:55,972 INFO L224 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 [2019-10-02 11:31:56,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:31:56,707 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-10-02 11:31:56,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:56,713 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-10-02 11:31:56,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:00,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:00,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:00,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-10-02 11:32:00,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-10-02 11:32:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-10-02 11:32:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-10-02 11:32:00,976 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-10-02 11:32:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:07,386 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-10-02 11:32:07,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-10-02 11:32:07,386 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-10-02 11:32:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:07,388 INFO L225 Difference]: With dead ends: 105 [2019-10-02 11:32:07,388 INFO L226 Difference]: Without dead ends: 102 [2019-10-02 11:32:07,388 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-10-02 11:32:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-02 11:32:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-10-02 11:32:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-02 11:32:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-10-02 11:32:07,398 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-10-02 11:32:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:07,398 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-10-02 11:32:07,398 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-10-02 11:32:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-10-02 11:32:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 11:32:07,399 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:07,399 INFO L411 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:07,399 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-10-02 11:32:07,399 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:07,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:07,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:07,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:32:07,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:07,408 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:07,408 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:07,409 INFO L224 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 [2019-10-02 11:32:07,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:32:19,666 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-10-02 11:32:19,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:32:19,677 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-10-02 11:32:19,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:23,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:23,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:23,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-10-02 11:32:23,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-10-02 11:32:23,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-10-02 11:32:23,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-10-02 11:32:23,893 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-10-02 11:32:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:30,213 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-10-02 11:32:30,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-10-02 11:32:30,213 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-10-02 11:32:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:30,214 INFO L225 Difference]: With dead ends: 106 [2019-10-02 11:32:30,214 INFO L226 Difference]: Without dead ends: 103 [2019-10-02 11:32:30,215 INFO L640 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 [2019-10-02 11:32:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-02 11:32:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-10-02 11:32:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-02 11:32:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-10-02 11:32:30,224 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-10-02 11:32:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:30,224 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-10-02 11:32:30,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-10-02 11:32:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-10-02 11:32:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-02 11:32:30,225 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:30,225 INFO L411 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:30,225 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-10-02 11:32:30,225 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:30,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:30,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:30,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:32:30,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:30,234 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:30,234 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:30,234 INFO L224 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 [2019-10-02 11:32:30,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:32:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:32:30,846 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-10-02 11:32:30,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:35,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:35,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:35,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-10-02 11:32:35,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-10-02 11:32:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-10-02 11:32:35,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-10-02 11:32:35,123 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-10-02 11:32:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:41,590 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-10-02 11:32:41,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-10-02 11:32:41,591 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-10-02 11:32:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:41,591 INFO L225 Difference]: With dead ends: 107 [2019-10-02 11:32:41,591 INFO L226 Difference]: Without dead ends: 104 [2019-10-02 11:32:41,592 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-10-02 11:32:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-02 11:32:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-02 11:32:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-02 11:32:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-10-02 11:32:41,602 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-10-02 11:32:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:41,602 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-10-02 11:32:41,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-10-02 11:32:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-10-02 11:32:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-02 11:32:41,603 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:41,603 INFO L411 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:41,604 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-10-02 11:32:41,604 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:41,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:41,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:41,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:32:41,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:41,614 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:41,614 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:41,614 INFO L224 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 [2019-10-02 11:32:41,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:32:42,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:32:42,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:32:42,240 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-10-02 11:32:42,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:46,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:46,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:46,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-10-02 11:32:46,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-10-02 11:32:46,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-10-02 11:32:46,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-10-02 11:32:46,603 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-10-02 11:32:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:53,121 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-10-02 11:32:53,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-10-02 11:32:53,122 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-10-02 11:32:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:53,123 INFO L225 Difference]: With dead ends: 108 [2019-10-02 11:32:53,123 INFO L226 Difference]: Without dead ends: 105 [2019-10-02 11:32:53,124 INFO L640 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 [2019-10-02 11:32:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-02 11:32:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-10-02 11:32:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-02 11:32:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-10-02 11:32:53,135 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-10-02 11:32:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:53,136 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-10-02 11:32:53,136 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-10-02 11:32:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-10-02 11:32:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-02 11:32:53,136 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:53,137 INFO L411 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:53,137 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:53,137 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-10-02 11:32:53,137 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:53,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:53,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:53,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:32:53,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:53,146 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:53,146 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:53,146 INFO L224 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 [2019-10-02 11:32:53,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:34:03,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-10-02 11:34:03,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:34:03,855 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-10-02 11:34:03,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:34:08,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:34:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:34:08,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:34:08,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-10-02 11:34:08,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-10-02 11:34:08,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-10-02 11:34:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-10-02 11:34:08,471 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-10-02 11:34:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:34:15,278 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-10-02 11:34:15,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-10-02 11:34:15,278 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-10-02 11:34:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:34:15,280 INFO L225 Difference]: With dead ends: 109 [2019-10-02 11:34:15,280 INFO L226 Difference]: Without dead ends: 106 [2019-10-02 11:34:15,281 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-10-02 11:34:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-02 11:34:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-10-02 11:34:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-02 11:34:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-10-02 11:34:15,292 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-10-02 11:34:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:34:15,292 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-10-02 11:34:15,292 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-10-02 11:34:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-10-02 11:34:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-02 11:34:15,293 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:34:15,293 INFO L411 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:34:15,293 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:34:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:34:15,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-10-02 11:34:15,294 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:34:15,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:34:15,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:15,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:34:15,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:15,304 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:34:15,305 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:34:15,305 INFO L224 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 [2019-10-02 11:34:15,519 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:34:17,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:34:17,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:34:17,055 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-10-02 11:34:17,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:34:21,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:34:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:34:21,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:34:21,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-10-02 11:34:21,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-10-02 11:34:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-10-02 11:34:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-10-02 11:34:21,630 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-10-02 11:34:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:34:28,613 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-10-02 11:34:28,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-10-02 11:34:28,613 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-10-02 11:34:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:34:28,614 INFO L225 Difference]: With dead ends: 110 [2019-10-02 11:34:28,614 INFO L226 Difference]: Without dead ends: 107 [2019-10-02 11:34:28,615 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-10-02 11:34:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-02 11:34:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-10-02 11:34:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-02 11:34:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-10-02 11:34:28,627 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-10-02 11:34:28,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:34:28,627 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-10-02 11:34:28,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-10-02 11:34:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-10-02 11:34:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-02 11:34:28,628 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:34:28,629 INFO L411 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:34:28,629 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:34:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:34:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-10-02 11:34:28,629 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:34:28,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:34:28,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:28,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:34:28,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:28,640 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:34:28,641 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:34:28,641 INFO L224 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 [2019-10-02 11:34:28,874 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:34:29,460 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-10-02 11:34:29,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:34:29,468 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-10-02 11:34:29,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:34:34,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:34:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:34:34,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:34:34,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-10-02 11:34:34,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-10-02 11:34:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-10-02 11:34:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-10-02 11:34:34,371 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-10-02 11:34:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:34:41,548 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-10-02 11:34:41,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-10-02 11:34:41,549 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-10-02 11:34:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:34:41,550 INFO L225 Difference]: With dead ends: 111 [2019-10-02 11:34:41,550 INFO L226 Difference]: Without dead ends: 108 [2019-10-02 11:34:41,551 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-10-02 11:34:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-02 11:34:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-10-02 11:34:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-02 11:34:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-10-02 11:34:41,564 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-10-02 11:34:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:34:41,564 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-10-02 11:34:41,564 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-10-02 11:34:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-10-02 11:34:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 11:34:41,565 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:34:41,565 INFO L411 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:34:41,566 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:34:41,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:34:41,566 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-10-02 11:34:41,566 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:34:41,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:34:41,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:41,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:34:41,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:41,577 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:34:41,577 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:34:41,578 INFO L224 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 [2019-10-02 11:34:41,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:34:56,170 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-10-02 11:34:56,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:34:56,183 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-10-02 11:34:56,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:35:00,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:35:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:35:00,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:35:00,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-10-02 11:35:00,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-10-02 11:35:00,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-10-02 11:35:00,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-10-02 11:35:00,930 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-10-02 11:35:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:35:08,305 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-10-02 11:35:08,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-10-02 11:35:08,306 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-10-02 11:35:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:35:08,307 INFO L225 Difference]: With dead ends: 112 [2019-10-02 11:35:08,307 INFO L226 Difference]: Without dead ends: 109 [2019-10-02 11:35:08,308 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-10-02 11:35:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-02 11:35:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-10-02 11:35:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-02 11:35:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-10-02 11:35:08,317 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-10-02 11:35:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:35:08,318 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-10-02 11:35:08,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-10-02 11:35:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-10-02 11:35:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-02 11:35:08,318 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:35:08,319 INFO L411 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:35:08,319 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:35:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:35:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-10-02 11:35:08,319 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:35:08,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:35:08,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:35:08,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:35:08,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:35:08,327 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:35:08,327 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:35:08,327 INFO L224 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 [2019-10-02 11:35:08,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:35:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:35:09,019 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-10-02 11:35:09,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:35:13,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:35:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:35:13,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:35:13,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-10-02 11:35:13,939 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-10-02 11:35:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-10-02 11:35:13,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-10-02 11:35:13,940 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-10-02 11:35:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:35:21,518 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-10-02 11:35:21,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-10-02 11:35:21,518 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-10-02 11:35:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:35:21,519 INFO L225 Difference]: With dead ends: 113 [2019-10-02 11:35:21,519 INFO L226 Difference]: Without dead ends: 110 [2019-10-02 11:35:21,519 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-10-02 11:35:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-02 11:35:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-10-02 11:35:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-02 11:35:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-10-02 11:35:21,529 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-10-02 11:35:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:35:21,529 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-10-02 11:35:21,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-10-02 11:35:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-10-02 11:35:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-02 11:35:21,530 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:35:21,530 INFO L411 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:35:21,530 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:35:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:35:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-10-02 11:35:21,531 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:35:21,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:35:21,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:35:21,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:35:21,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:35:21,541 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:35:21,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:35:21,542 INFO L224 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 [2019-10-02 11:35:21,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:35:22,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:35:22,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:35:22,258 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-10-02 11:35:22,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:35:27,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:35:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:35:27,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:35:27,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-10-02 11:35:27,178 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-10-02 11:35:27,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-10-02 11:35:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-10-02 11:35:27,179 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-10-02 11:35:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:35:34,840 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-10-02 11:35:34,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-10-02 11:35:34,840 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-10-02 11:35:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:35:34,841 INFO L225 Difference]: With dead ends: 114 [2019-10-02 11:35:34,841 INFO L226 Difference]: Without dead ends: 111 [2019-10-02 11:35:34,841 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-10-02 11:35:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-02 11:35:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-10-02 11:35:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-02 11:35:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-10-02 11:35:34,850 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-10-02 11:35:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:35:34,851 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-10-02 11:35:34,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-10-02 11:35:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-10-02 11:35:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-02 11:35:34,851 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:35:34,851 INFO L411 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:35:34,851 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:35:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:35:34,852 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-10-02 11:35:34,852 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:35:34,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:35:34,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:35:34,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:35:34,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:35:34,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:35:34,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:35:34,863 INFO L224 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 [2019-10-02 11:35:35,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2