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.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:06:05,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:06:05,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:06:05,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 03:06:05,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 03:06:05,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 03:06:05,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 03:06:05,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 03:06:05,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 03:06:05,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 03:06:05,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 03:06:05,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 03:06:05,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 03:06:05,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 03:06:05,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 03:06:05,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 03:06:05,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 03:06:05,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 03:06:05,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 03:06:05,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 03:06:05,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 03:06:05,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 03:06:05,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 03:06:05,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 03:06:05,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 03:06:05,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:06:05,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:06:05,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:06:05,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 03:06:05,644 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:06:05,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:06:05,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:06:05,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:06:05,646 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:06:05,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:06:05,647 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:06:05,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:06:05,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:06:05,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:06:05,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:06:05,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:06:05,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:06:05,648 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:06:05,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:06:05,648 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:06:05,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:06:05,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:06:05,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:06:05,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:06:05,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:06:05,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:06:05,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:06:05,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:06:05,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:06:05,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:06:05,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:06:05,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:06:05,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:06:05,679 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:06:05,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:06:05,696 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:06:05,697 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:06:05,698 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:06:05,698 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-08 03:06:05,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30597dd39/324e1ae282ac43f8a7ff60d46544570d/FLAG18599ad0b [2019-09-08 03:06:06,196 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:06:06,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-08 03:06:06,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30597dd39/324e1ae282ac43f8a7ff60d46544570d/FLAG18599ad0b [2019-09-08 03:06:06,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30597dd39/324e1ae282ac43f8a7ff60d46544570d [2019-09-08 03:06:06,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:06:06,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:06:06,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:06:06,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:06:06,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:06:06,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:06,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c5c8882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06, skipping insertion in model container [2019-09-08 03:06:06,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:06,656 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:06:06,674 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:06:06,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:06:06,880 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:06:06,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:06:06,925 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:06:06,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06 WrapperNode [2019-09-08 03:06:06,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:06:06,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:06:06,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:06:06,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:06:07,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:07,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:07,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:07,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:07,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:07,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:07,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... [2019-09-08 03:06:07,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:06:07,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:06:07,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:06:07,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:06:07,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:06:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:06:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:06:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:06:07,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:06:07,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-08 03:06:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:06:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 03:06:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:06:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:06:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:06:07,319 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:06:07,320 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 03:06:07,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:06:07 BoogieIcfgContainer [2019-09-08 03:06:07,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:06:07,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:06:07,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:06:07,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:06:07,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:06:06" (1/3) ... [2019-09-08 03:06:07,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e59dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:06:07, skipping insertion in model container [2019-09-08 03:06:07,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:06" (2/3) ... [2019-09-08 03:06:07,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e59dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:06:07, skipping insertion in model container [2019-09-08 03:06:07,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:06:07" (3/3) ... [2019-09-08 03:06:07,329 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-09-08 03:06:07,338 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:06:07,346 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:06:07,362 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:06:07,391 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:06:07,392 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:06:07,392 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:06:07,392 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:06:07,392 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:06:07,393 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:06:07,393 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:06:07,393 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:06:07,393 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:06:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-08 03:06:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-08 03:06:07,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:07,430 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:07,432 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-08 03:06:07,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:07,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:07,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:07,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:07,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:07,511 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:07,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:07,512 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:07,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:07,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-08 03:06:07,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:07,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:06:07,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-08 03:06:07,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-08 03:06:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-08 03:06:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-08 03:06:07,673 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-08 03:06:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:07,802 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-08 03:06:07,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-08 03:06:07,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-08 03:06:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:07,811 INFO L225 Difference]: With dead ends: 26 [2019-09-08 03:06:07,811 INFO L226 Difference]: Without dead ends: 13 [2019-09-08 03:06:07,814 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-08 03:06:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-08 03:06:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-08 03:06:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-08 03:06:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-08 03:06:07,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-08 03:06:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:07,851 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-08 03:06:07,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-08 03:06:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-08 03:06:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-08 03:06:07,852 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:07,852 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:07,853 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-08 03:06:07,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:07,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:07,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:07,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:07,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:07,866 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:07,866 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:07,866 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:07,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:07,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:06:07,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:07,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:07,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:07,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-08 03:06:07,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 03:06:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 03:06:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:06:07,996 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-08 03:06:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:08,070 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-08 03:06:08,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 03:06:08,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-08 03:06:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:08,071 INFO L225 Difference]: With dead ends: 17 [2019-09-08 03:06:08,072 INFO L226 Difference]: Without dead ends: 14 [2019-09-08 03:06:08,073 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:06:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-08 03:06:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-08 03:06:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-08 03:06:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-08 03:06:08,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-08 03:06:08,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:08,084 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-08 03:06:08,084 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 03:06:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-08 03:06:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 03:06:08,086 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:08,087 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:08,088 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-08 03:06:08,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:08,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:08,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:08,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,121 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:08,121 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:08,121 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:08,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:08,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:08,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:08,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 03:06:08,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:08,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:08,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:08,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-08 03:06:08,248 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 03:06:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 03:06:08,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:06:08,252 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-09-08 03:06:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:08,312 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-08 03:06:08,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 03:06:08,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-08 03:06:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:08,313 INFO L225 Difference]: With dead ends: 18 [2019-09-08 03:06:08,314 INFO L226 Difference]: Without dead ends: 15 [2019-09-08 03:06:08,314 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:06:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-08 03:06:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-08 03:06:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-08 03:06:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-08 03:06:08,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-08 03:06:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:08,320 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-08 03:06:08,320 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 03:06:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-08 03:06:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 03:06:08,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:08,321 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:08,321 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:08,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:08,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-09-08 03:06:08,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:08,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:08,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:08,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,333 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:08,333 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:08,333 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:08,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:08,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-08 03:06:08,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:08,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-08 03:06:08,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:08,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:08,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:08,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-08 03:06:08,465 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 03:06:08,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 03:06:08,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:06:08,466 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-09-08 03:06:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:08,532 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-08 03:06:08,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 03:06:08,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-08 03:06:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:08,533 INFO L225 Difference]: With dead ends: 19 [2019-09-08 03:06:08,534 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 03:06:08,534 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:06:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 03:06:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-08 03:06:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-08 03:06:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-08 03:06:08,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-08 03:06:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:08,540 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-08 03:06:08,540 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 03:06:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-08 03:06:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-08 03:06:08,541 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:08,541 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:08,541 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-09-08 03:06:08,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:08,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:08,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:08,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,553 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:08,553 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:08,553 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:08,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:08,618 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:08,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:08,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-08 03:06:08,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:08,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:08,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:08,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-08 03:06:08,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 03:06:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 03:06:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:06:08,726 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-09-08 03:06:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:08,810 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-08 03:06:08,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 03:06:08,811 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-08 03:06:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:08,812 INFO L225 Difference]: With dead ends: 20 [2019-09-08 03:06:08,812 INFO L226 Difference]: Without dead ends: 17 [2019-09-08 03:06:08,813 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:06:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-08 03:06:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-08 03:06:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-08 03:06:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-08 03:06:08,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-08 03:06:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:08,820 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-08 03:06:08,820 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 03:06:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-08 03:06:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-08 03:06:08,824 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:08,824 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:08,824 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-09-08 03:06:08,825 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:08,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:08,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:08,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:08,853 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:08,853 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:08,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:08,887 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:08,906 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-08 03:06:08,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:08,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-08 03:06:08,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:08,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:09,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:09,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-08 03:06:09,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 03:06:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 03:06:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:06:09,008 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-09-08 03:06:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:09,148 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-08 03:06:09,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:06:09,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-08 03:06:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:09,151 INFO L225 Difference]: With dead ends: 21 [2019-09-08 03:06:09,151 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 03:06:09,151 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:06:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 03:06:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 03:06:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 03:06:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-08 03:06:09,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-08 03:06:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:09,156 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-08 03:06:09,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 03:06:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-08 03:06:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-08 03:06:09,157 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:09,157 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:09,157 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-09-08 03:06:09,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:09,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:09,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:09,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:09,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:09,169 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:09,169 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:09,169 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:09,197 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:06:09,215 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-08 03:06:09,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:09,217 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-08 03:06:09,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:09,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:09,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:09,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-08 03:06:09,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:06:09,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:06:09,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:06:09,340 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-08 03:06:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:09,430 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-08 03:06:09,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 03:06:09,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-08 03:06:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:09,432 INFO L225 Difference]: With dead ends: 22 [2019-09-08 03:06:09,432 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 03:06:09,433 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:06:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 03:06:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-08 03:06:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-08 03:06:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-08 03:06:09,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-08 03:06:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:09,438 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-08 03:06:09,438 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:06:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-08 03:06:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-08 03:06:09,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:09,439 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:09,439 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-09-08 03:06:09,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:09,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:09,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:09,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:09,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:09,450 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:09,451 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:09,451 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:09,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:09,485 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-08 03:06:09,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:09,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:09,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:09,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-08 03:06:09,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:06:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:06:09,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:06:09,675 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-08 03:06:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:09,786 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-08 03:06:09,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 03:06:09,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-08 03:06:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:09,787 INFO L225 Difference]: With dead ends: 23 [2019-09-08 03:06:09,787 INFO L226 Difference]: Without dead ends: 20 [2019-09-08 03:06:09,788 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:06:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-08 03:06:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-08 03:06:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-08 03:06:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-08 03:06:09,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-08 03:06:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:09,794 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-08 03:06:09,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:06:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-08 03:06:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 03:06:09,794 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:09,795 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:09,795 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-09-08 03:06:09,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:09,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:09,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:09,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:09,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:09,807 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:09,807 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:09,807 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:06:09,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:09,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:09,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:09,861 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-08 03:06:09,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:10,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:10,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:10,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-08 03:06:10,044 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 03:06:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 03:06:10,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:06:10,045 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-08 03:06:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:10,205 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-08 03:06:10,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 03:06:10,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-08 03:06:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:10,207 INFO L225 Difference]: With dead ends: 24 [2019-09-08 03:06:10,207 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 03:06:10,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:06:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 03:06:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 03:06:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 03:06:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-08 03:06:10,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-08 03:06:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:10,216 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-08 03:06:10,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 03:06:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-08 03:06:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-08 03:06:10,217 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:10,217 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:10,217 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-09-08 03:06:10,218 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:10,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:10,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:10,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:10,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:10,242 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:10,242 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:10,242 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:10,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:10,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-08 03:06:10,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:10,293 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-08 03:06:10,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:10,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:10,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:10,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-08 03:06:10,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 03:06:10,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 03:06:10,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:06:10,432 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-08 03:06:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:10,560 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-08 03:06:10,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 03:06:10,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-08 03:06:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:10,561 INFO L225 Difference]: With dead ends: 25 [2019-09-08 03:06:10,561 INFO L226 Difference]: Without dead ends: 22 [2019-09-08 03:06:10,562 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:06:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-08 03:06:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-08 03:06:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-08 03:06:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-08 03:06:10,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-08 03:06:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:10,567 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-08 03:06:10,567 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 03:06:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-08 03:06:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-08 03:06:10,568 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:10,568 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:10,568 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-09-08 03:06:10,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:10,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:10,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:10,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:10,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:10,579 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:10,579 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:10,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:10,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:10,688 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:10,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:10,690 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-08 03:06:10,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:10,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:10,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:10,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-08 03:06:10,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 03:06:10,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 03:06:10,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:06:10,859 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-08 03:06:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:11,000 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-08 03:06:11,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 03:06:11,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-08 03:06:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:11,001 INFO L225 Difference]: With dead ends: 26 [2019-09-08 03:06:11,002 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 03:06:11,002 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:06:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 03:06:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 03:06:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 03:06:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-08 03:06:11,007 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-08 03:06:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:11,007 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-08 03:06:11,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 03:06:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-08 03:06:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-08 03:06:11,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:11,008 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:11,008 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-09-08 03:06:11,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:11,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:11,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:11,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:11,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:11,026 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:11,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:11,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:06:11,043 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:11,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-08 03:06:11,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:11,073 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-08 03:06:11,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:11,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:11,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:11,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-08 03:06:11,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 03:06:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 03:06:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:06:11,278 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-08 03:06:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:11,563 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-08 03:06:11,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 03:06:11,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-08 03:06:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:11,564 INFO L225 Difference]: With dead ends: 27 [2019-09-08 03:06:11,565 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 03:06:11,565 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:06:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 03:06:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 03:06:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 03:06:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-08 03:06:11,577 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-08 03:06:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:11,577 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-08 03:06:11,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 03:06:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-08 03:06:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-08 03:06:11,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:11,579 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:11,579 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:11,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-09-08 03:06:11,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:11,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:11,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:11,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:11,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:11,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:11,610 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:11,613 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:11,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:11,680 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 03:06:11,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:11,683 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-08 03:06:11,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:11,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:11,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:11,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-08 03:06:11,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 03:06:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 03:06:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:06:11,932 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-08 03:06:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:12,182 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-08 03:06:12,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 03:06:12,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-08 03:06:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:12,184 INFO L225 Difference]: With dead ends: 28 [2019-09-08 03:06:12,185 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 03:06:12,185 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:06:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 03:06:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-08 03:06:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-08 03:06:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-08 03:06:12,191 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-08 03:06:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:12,192 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-08 03:06:12,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 03:06:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-08 03:06:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-08 03:06:12,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:12,193 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:12,193 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-09-08 03:06:12,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:12,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:12,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:12,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:12,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:12,205 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:12,205 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:12,205 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:12,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:12,259 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-08 03:06:12,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:12,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:12,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:12,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-08 03:06:12,540 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 03:06:12,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 03:06:12,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:06:12,541 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-08 03:06:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:12,781 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-08 03:06:12,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:06:12,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-08 03:06:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:12,783 INFO L225 Difference]: With dead ends: 29 [2019-09-08 03:06:12,783 INFO L226 Difference]: Without dead ends: 26 [2019-09-08 03:06:12,784 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:06:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-08 03:06:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-08 03:06:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-08 03:06:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-08 03:06:12,793 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-08 03:06:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:12,794 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-08 03:06:12,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 03:06:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-08 03:06:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 03:06:12,796 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:12,796 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:12,796 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-09-08 03:06:12,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:12,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:12,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:12,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:12,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:12,819 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:12,819 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:12,819 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:12,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:12,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:12,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:12,871 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-08 03:06:12,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:13,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:13,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:13,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-08 03:06:13,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:06:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:06:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:06:13,157 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-08 03:06:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:13,372 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-08 03:06:13,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 03:06:13,373 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-08 03:06:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:13,373 INFO L225 Difference]: With dead ends: 30 [2019-09-08 03:06:13,373 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 03:06:13,374 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:06:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 03:06:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 03:06:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 03:06:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-08 03:06:13,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-08 03:06:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:13,379 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-08 03:06:13,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:06:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-08 03:06:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 03:06:13,380 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:13,380 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:13,380 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-09-08 03:06:13,381 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:13,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:13,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:13,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:13,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:13,389 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:13,389 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:13,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:13,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:06:13,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-08 03:06:13,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:13,485 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-08 03:06:13,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:13,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:13,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:13,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-08 03:06:13,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 03:06:13,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 03:06:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:06:13,732 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-08 03:06:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:13,975 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-08 03:06:13,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 03:06:13,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-08 03:06:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:13,978 INFO L225 Difference]: With dead ends: 31 [2019-09-08 03:06:13,979 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 03:06:13,979 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:06:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 03:06:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 03:06:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 03:06:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-08 03:06:13,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-08 03:06:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:13,984 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-08 03:06:13,984 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 03:06:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-08 03:06:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 03:06:13,985 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:13,985 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:13,986 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-09-08 03:06:13,986 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:13,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:13,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:13,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:13,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:13,995 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:13,995 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:13,995 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:14,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:14,167 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:14,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:14,168 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-08 03:06:14,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:14,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:14,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:14,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-08 03:06:14,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 03:06:14,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 03:06:14,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:06:14,442 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-08 03:06:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:14,759 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-08 03:06:14,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 03:06:14,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-08 03:06:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:14,761 INFO L225 Difference]: With dead ends: 32 [2019-09-08 03:06:14,761 INFO L226 Difference]: Without dead ends: 29 [2019-09-08 03:06:14,762 INFO L628 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 [2019-09-08 03:06:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-08 03:06:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-08 03:06:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 03:06:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-08 03:06:14,769 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-08 03:06:14,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:14,769 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-08 03:06:14,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 03:06:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-08 03:06:14,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 03:06:14,770 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:14,771 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:14,771 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:14,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:14,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-09-08 03:06:14,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:14,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:14,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:14,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:14,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:14,781 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:14,781 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:14,781 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:14,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:14,837 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-08 03:06:14,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:14,839 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-08 03:06:14,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:15,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:15,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:15,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-08 03:06:15,162 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 03:06:15,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 03:06:15,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:06:15,163 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-09-08 03:06:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:15,497 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-08 03:06:15,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 03:06:15,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-09-08 03:06:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:15,498 INFO L225 Difference]: With dead ends: 33 [2019-09-08 03:06:15,498 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 03:06:15,498 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:06:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 03:06:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 03:06:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 03:06:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-08 03:06:15,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-08 03:06:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:15,505 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-08 03:06:15,505 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 03:06:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-08 03:06:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-08 03:06:15,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:15,506 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:15,506 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:15,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:15,506 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-09-08 03:06:15,506 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:15,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:15,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:15,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:15,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:15,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:15,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:15,517 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:15,530 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:06:15,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-08 03:06:15,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:15,571 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-08 03:06:15,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:15,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:15,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:15,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-08 03:06:15,907 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 03:06:15,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 03:06:15,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:06:15,907 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-08 03:06:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:16,272 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-08 03:06:16,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 03:06:16,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-08 03:06:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:16,273 INFO L225 Difference]: With dead ends: 34 [2019-09-08 03:06:16,273 INFO L226 Difference]: Without dead ends: 31 [2019-09-08 03:06:16,274 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:06:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-08 03:06:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-08 03:06:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-08 03:06:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-08 03:06:16,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-08 03:06:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:16,278 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-08 03:06:16,279 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 03:06:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-08 03:06:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-08 03:06:16,279 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:16,279 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:16,280 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-09-08 03:06:16,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:16,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:16,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:16,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:16,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:16,288 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:16,288 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:16,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:16,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:16,335 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-08 03:06:16,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:16,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:16,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:16,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-08 03:06:16,720 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 03:06:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 03:06:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:06:16,721 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-08 03:06:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:17,101 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-08 03:06:17,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 03:06:17,102 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-08 03:06:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:17,102 INFO L225 Difference]: With dead ends: 35 [2019-09-08 03:06:17,102 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 03:06:17,103 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:06:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 03:06:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-08 03:06:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 03:06:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-08 03:06:17,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-08 03:06:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:17,108 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-08 03:06:17,108 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 03:06:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-08 03:06:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 03:06:17,109 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:17,109 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:17,109 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-09-08 03:06:17,110 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:17,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:17,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:17,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:17,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:17,125 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:17,125 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:17,125 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:17,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:17,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:17,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:17,185 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-08 03:06:17,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:17,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:17,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:17,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-08 03:06:17,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 03:06:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 03:06:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:06:17,551 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-08 03:06:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:17,942 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-08 03:06:17,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 03:06:17,943 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-08 03:06:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:17,943 INFO L225 Difference]: With dead ends: 36 [2019-09-08 03:06:17,943 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 03:06:17,944 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:06:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 03:06:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-08 03:06:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 03:06:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-08 03:06:17,948 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-08 03:06:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:17,949 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-08 03:06:17,949 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 03:06:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-08 03:06:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-08 03:06:17,950 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:17,950 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:17,950 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:17,950 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-09-08 03:06:17,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:17,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:17,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:17,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:17,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:17,958 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:17,958 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:17,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:17,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:18,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-08 03:06:18,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:18,101 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-08 03:06:18,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:18,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:18,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:18,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-08 03:06:18,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 03:06:18,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 03:06:18,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:06:18,526 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-08 03:06:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:18,966 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-08 03:06:18,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-08 03:06:18,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-08 03:06:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:18,969 INFO L225 Difference]: With dead ends: 37 [2019-09-08 03:06:18,969 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 03:06:18,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:06:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 03:06:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-08 03:06:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-08 03:06:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-08 03:06:18,975 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-08 03:06:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:18,975 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-08 03:06:18,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 03:06:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-08 03:06:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-08 03:06:18,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:18,976 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:18,976 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-09-08 03:06:18,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:18,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:18,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:18,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:18,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:18,985 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:18,985 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:18,985 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:19,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:19,162 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:19,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:19,164 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-08 03:06:19,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:19,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:19,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:19,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-08 03:06:19,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 03:06:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 03:06:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:06:19,603 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-08 03:06:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:20,055 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-08 03:06:20,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 03:06:20,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-08 03:06:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:20,056 INFO L225 Difference]: With dead ends: 38 [2019-09-08 03:06:20,056 INFO L226 Difference]: Without dead ends: 35 [2019-09-08 03:06:20,057 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:06:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-08 03:06:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-08 03:06:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-08 03:06:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-08 03:06:20,061 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-08 03:06:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:20,062 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-08 03:06:20,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 03:06:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-08 03:06:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-08 03:06:20,062 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:20,063 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:20,063 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:20,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-09-08 03:06:20,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:20,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:20,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:20,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:20,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:20,071 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:20,071 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:20,071 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:20,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:20,122 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-08 03:06:20,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:20,123 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-08 03:06:20,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:20,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:20,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:20,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-08 03:06:20,545 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 03:06:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 03:06:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:06:20,546 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-08 03:06:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:21,031 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-08 03:06:21,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 03:06:21,034 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-08 03:06:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:21,034 INFO L225 Difference]: With dead ends: 39 [2019-09-08 03:06:21,034 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 03:06:21,035 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:06:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 03:06:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 03:06:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 03:06:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-08 03:06:21,039 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-08 03:06:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:21,040 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-08 03:06:21,040 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 03:06:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-08 03:06:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-08 03:06:21,040 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:21,041 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:21,041 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-09-08 03:06:21,041 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:21,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:21,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:21,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:21,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:21,049 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:21,049 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:21,050 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:21,126 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 03:06:21,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:21,129 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-08 03:06:21,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:21,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:21,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:21,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-08 03:06:21,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 03:06:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 03:06:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:06:21,630 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-08 03:06:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:22,182 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-08 03:06:22,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 03:06:22,183 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-08 03:06:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:22,184 INFO L225 Difference]: With dead ends: 40 [2019-09-08 03:06:22,184 INFO L226 Difference]: Without dead ends: 37 [2019-09-08 03:06:22,185 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:06:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-08 03:06:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-08 03:06:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 03:06:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-08 03:06:22,191 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-08 03:06:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:22,191 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-08 03:06:22,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 03:06:22,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-08 03:06:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-08 03:06:22,191 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:22,191 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:22,192 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-09-08 03:06:22,192 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:22,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:22,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:22,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:22,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:22,199 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:22,199 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:22,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:22,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:22,253 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-08 03:06:22,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:22,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:22,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:22,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-08 03:06:22,735 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 03:06:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 03:06:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:06:22,736 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-08 03:06:23,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:23,294 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-08 03:06:23,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-08 03:06:23,294 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-08 03:06:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:23,295 INFO L225 Difference]: With dead ends: 41 [2019-09-08 03:06:23,295 INFO L226 Difference]: Without dead ends: 38 [2019-09-08 03:06:23,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:06:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-08 03:06:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-08 03:06:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-08 03:06:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-08 03:06:23,301 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-08 03:06:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:23,302 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-08 03:06:23,302 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 03:06:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-08 03:06:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 03:06:23,302 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:23,303 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:23,303 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-09-08 03:06:23,303 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:23,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:23,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:23,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:23,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:23,311 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:23,311 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:23,311 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:23,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:23,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:23,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:23,391 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-08 03:06:23,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:23,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:23,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:23,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-08 03:06:23,852 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 03:06:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 03:06:23,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:06:23,852 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-08 03:06:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:24,461 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-08 03:06:24,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 03:06:24,462 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-08 03:06:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:24,463 INFO L225 Difference]: With dead ends: 42 [2019-09-08 03:06:24,463 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 03:06:24,464 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:06:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 03:06:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 03:06:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 03:06:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-08 03:06:24,468 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-08 03:06:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:24,468 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-08 03:06:24,468 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 03:06:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-08 03:06:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-08 03:06:24,469 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:24,469 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:24,469 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-09-08 03:06:24,470 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:24,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:24,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:24,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:24,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:24,477 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:24,478 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:24,478 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:24,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:06:24,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-08 03:06:24,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:24,793 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-08 03:06:24,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:25,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:25,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:25,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-08 03:06:25,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 03:06:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 03:06:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:06:25,344 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-08 03:06:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:26,036 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-08 03:06:26,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 03:06:26,036 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-08 03:06:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:26,037 INFO L225 Difference]: With dead ends: 43 [2019-09-08 03:06:26,037 INFO L226 Difference]: Without dead ends: 40 [2019-09-08 03:06:26,037 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:06:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-08 03:06:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-08 03:06:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-08 03:06:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-08 03:06:26,042 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-08 03:06:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:26,042 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-08 03:06:26,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 03:06:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-08 03:06:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 03:06:26,043 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:26,043 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:26,043 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:26,044 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-09-08 03:06:26,044 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:26,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:26,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:26,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:26,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:26,052 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:26,052 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:26,052 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:26,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:26,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:26,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:26,287 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-08 03:06:26,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:26,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:26,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:26,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-08 03:06:26,879 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-08 03:06:26,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-08 03:06:26,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:06:26,880 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-08 03:06:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:27,635 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-08 03:06:27,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 03:06:27,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-08 03:06:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:27,636 INFO L225 Difference]: With dead ends: 44 [2019-09-08 03:06:27,636 INFO L226 Difference]: Without dead ends: 41 [2019-09-08 03:06:27,637 INFO L628 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 [2019-09-08 03:06:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-08 03:06:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-08 03:06:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-08 03:06:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-08 03:06:27,642 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-08 03:06:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:27,642 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-08 03:06:27,643 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-08 03:06:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-08 03:06:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 03:06:27,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:27,643 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:27,643 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-09-08 03:06:27,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:27,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:27,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:27,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:27,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:27,652 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:27,652 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:27,652 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:27,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:27,734 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-08 03:06:27,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:27,738 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-08 03:06:27,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:28,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:28,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:28,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-08 03:06:28,364 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 03:06:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 03:06:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:06:28,366 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-08 03:06:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:29,175 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-08 03:06:29,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-08 03:06:29,175 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-08 03:06:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:29,176 INFO L225 Difference]: With dead ends: 45 [2019-09-08 03:06:29,176 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 03:06:29,177 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:06:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 03:06:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 03:06:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 03:06:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-08 03:06:29,182 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-08 03:06:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:29,182 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-08 03:06:29,182 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 03:06:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-08 03:06:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-08 03:06:29,182 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:29,182 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:29,183 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-09-08 03:06:29,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:29,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:29,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:29,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:29,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:29,190 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:29,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:29,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:29,228 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:06:29,373 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-08 03:06:29,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:29,376 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-08 03:06:29,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:29,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:30,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:30,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-08 03:06:30,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 03:06:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 03:06:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:06:30,013 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-08 03:06:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:30,856 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-08 03:06:30,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 03:06:30,857 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-08 03:06:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:30,857 INFO L225 Difference]: With dead ends: 46 [2019-09-08 03:06:30,857 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 03:06:30,858 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:06:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 03:06:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-08 03:06:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-08 03:06:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-08 03:06:30,863 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-08 03:06:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:30,864 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-08 03:06:30,864 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 03:06:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-08 03:06:30,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-08 03:06:30,864 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:30,864 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:30,865 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-09-08 03:06:30,865 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:30,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:30,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:30,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:30,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:30,872 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:30,873 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:30,873 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:30,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:30,943 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-08 03:06:30,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:31,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:31,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:31,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-08 03:06:31,572 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 03:06:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 03:06:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:06:31,573 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-08 03:06:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:32,388 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-08 03:06:32,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-08 03:06:32,388 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-08 03:06:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:32,389 INFO L225 Difference]: With dead ends: 47 [2019-09-08 03:06:32,389 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 03:06:32,390 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:06:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 03:06:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-08 03:06:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-08 03:06:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-08 03:06:32,396 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-08 03:06:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:32,396 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-08 03:06:32,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 03:06:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-08 03:06:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 03:06:32,397 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:32,397 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:32,397 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-09-08 03:06:32,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:32,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:32,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:32,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:32,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:32,409 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:32,409 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:32,410 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:32,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:32,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:32,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:32,491 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-08 03:06:32,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:33,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:33,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:33,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-08 03:06:33,309 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 03:06:33,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 03:06:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:06:33,310 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-08 03:06:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:34,175 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-08 03:06:34,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 03:06:34,176 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-08 03:06:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:34,176 INFO L225 Difference]: With dead ends: 48 [2019-09-08 03:06:34,177 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 03:06:34,178 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 03:06:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 03:06:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 03:06:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 03:06:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-08 03:06:34,183 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-08 03:06:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:34,183 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-08 03:06:34,183 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 03:06:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-08 03:06:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-08 03:06:34,184 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:34,184 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:34,184 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-09-08 03:06:34,184 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:34,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:34,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:34,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:34,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:34,191 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:34,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:34,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:34,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:06:34,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-08 03:06:34,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:34,889 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-08 03:06:34,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:35,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:35,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:35,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-08 03:06:35,580 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-08 03:06:35,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-08 03:06:35,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 03:06:35,580 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-08 03:06:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:36,548 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-08 03:06:36,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-08 03:06:36,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-08 03:06:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:36,549 INFO L225 Difference]: With dead ends: 49 [2019-09-08 03:06:36,549 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 03:06:36,550 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:06:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 03:06:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-08 03:06:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-08 03:06:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-08 03:06:36,554 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-08 03:06:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:36,554 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-08 03:06:36,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-08 03:06:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-08 03:06:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-08 03:06:36,555 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:36,555 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:36,555 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-09-08 03:06:36,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:36,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:36,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:36,576 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:36,577 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:36,577 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:36,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:37,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:37,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:37,174 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-08 03:06:37,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:37,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:37,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:37,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-08 03:06:37,945 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-08 03:06:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-08 03:06:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:06:37,946 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-08 03:06:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:38,976 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-08 03:06:38,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 03:06:38,976 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-08 03:06:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:38,977 INFO L225 Difference]: With dead ends: 50 [2019-09-08 03:06:38,977 INFO L226 Difference]: Without dead ends: 47 [2019-09-08 03:06:38,978 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:06:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-08 03:06:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-08 03:06:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-08 03:06:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-08 03:06:38,982 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-08 03:06:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:38,982 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-08 03:06:38,982 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-08 03:06:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-08 03:06:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-08 03:06:38,983 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:38,983 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:38,983 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:38,983 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-09-08 03:06:38,983 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:38,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:38,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:38,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:38,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:38,990 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:38,990 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:38,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:39,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:39,068 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-08 03:06:39,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:39,071 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-08 03:06:39,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:39,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:39,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:39,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-08 03:06:39,864 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-08 03:06:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-08 03:06:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:06:39,865 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-08 03:06:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:40,974 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-08 03:06:40,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-08 03:06:40,974 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-08 03:06:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:40,975 INFO L225 Difference]: With dead ends: 51 [2019-09-08 03:06:40,975 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 03:06:40,976 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 03:06:40,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 03:06:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-08 03:06:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 03:06:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-08 03:06:40,981 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-08 03:06:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:40,981 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-08 03:06:40,981 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-08 03:06:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-08 03:06:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-08 03:06:40,982 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:40,982 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:40,982 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-09-08 03:06:40,983 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:40,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:40,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:40,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,990 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:40,990 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:40,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:41,006 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:41,203 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 03:06:41,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:41,206 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-08 03:06:41,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:41,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:41,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:41,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-08 03:06:41,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-08 03:06:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-08 03:06:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 03:06:41,991 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-08 03:06:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:43,082 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-08 03:06:43,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-08 03:06:43,082 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-08 03:06:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:43,083 INFO L225 Difference]: With dead ends: 52 [2019-09-08 03:06:43,083 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 03:06:43,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 03:06:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 03:06:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-08 03:06:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-08 03:06:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-08 03:06:43,088 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-08 03:06:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:43,088 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-08 03:06:43,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-08 03:06:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-08 03:06:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-08 03:06:43,089 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:43,089 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:43,089 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-09-08 03:06:43,090 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:43,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:43,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:43,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,097 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:43,097 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:43,097 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:43,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:43,186 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-08 03:06:43,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:43,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:44,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:44,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-08 03:06:44,015 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-08 03:06:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-08 03:06:44,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 03:06:44,016 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-08 03:06:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:45,149 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-08 03:06:45,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-08 03:06:45,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-08 03:06:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:45,150 INFO L225 Difference]: With dead ends: 53 [2019-09-08 03:06:45,150 INFO L226 Difference]: Without dead ends: 50 [2019-09-08 03:06:45,151 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:06:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-08 03:06:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-08 03:06:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-08 03:06:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-08 03:06:45,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-08 03:06:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:45,157 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-08 03:06:45,157 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-08 03:06:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-08 03:06:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 03:06:45,157 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:45,157 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:45,158 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-09-08 03:06:45,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:45,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:45,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:45,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:45,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:45,166 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:45,166 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:45,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:45,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:45,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:45,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:45,255 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-08 03:06:45,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:46,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:46,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:46,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-08 03:06:46,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-08 03:06:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-08 03:06:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:06:46,161 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-08 03:06:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:47,422 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-08 03:06:47,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-08 03:06:47,423 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-08 03:06:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:47,423 INFO L225 Difference]: With dead ends: 54 [2019-09-08 03:06:47,423 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 03:06:47,424 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 03:06:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 03:06:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-08 03:06:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 03:06:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-08 03:06:47,430 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-08 03:06:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:47,430 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-08 03:06:47,430 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-08 03:06:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-08 03:06:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-08 03:06:47,431 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:47,431 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:47,431 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:47,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-09-08 03:06:47,432 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:47,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:47,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:47,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:47,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:47,439 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:47,440 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:47,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:47,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:06:48,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-08 03:06:48,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:48,769 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-08 03:06:48,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:49,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:49,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:49,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-08 03:06:49,835 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-08 03:06:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-08 03:06:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 03:06:49,836 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-08 03:06:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:51,098 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-08 03:06:51,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-08 03:06:51,098 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-08 03:06:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:51,099 INFO L225 Difference]: With dead ends: 55 [2019-09-08 03:06:51,099 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 03:06:51,100 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 03:06:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 03:06:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-08 03:06:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-08 03:06:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-08 03:06:51,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-08 03:06:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:51,106 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-08 03:06:51,107 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-08 03:06:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-08 03:06:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-08 03:06:51,107 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:51,107 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:51,107 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-09-08 03:06:51,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:51,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:51,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:51,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:51,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:51,115 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:51,116 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:51,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:51,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:51,474 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:51,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:51,477 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-08 03:06:51,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:52,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:52,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:52,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-08 03:06:52,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-08 03:06:52,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-08 03:06:52,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 03:06:52,472 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-08 03:06:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:53,765 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-08 03:06:53,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 03:06:53,765 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-08 03:06:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:53,766 INFO L225 Difference]: With dead ends: 56 [2019-09-08 03:06:53,767 INFO L226 Difference]: Without dead ends: 53 [2019-09-08 03:06:53,768 INFO L628 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 [2019-09-08 03:06:53,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-08 03:06:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-08 03:06:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-08 03:06:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-08 03:06:53,774 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-08 03:06:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:53,774 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-08 03:06:53,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-08 03:06:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-08 03:06:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-08 03:06:53,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:53,775 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:53,775 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:53,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-09-08 03:06:53,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:53,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:53,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:53,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:53,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:53,783 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:53,783 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:53,783 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:53,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:53,881 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-08 03:06:53,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:53,885 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-08 03:06:53,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:54,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:54,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:54,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-08 03:06:54,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 03:06:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 03:06:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:06:54,928 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-08 03:06:56,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:56,310 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-08 03:06:56,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-08 03:06:56,310 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-08 03:06:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:56,311 INFO L225 Difference]: With dead ends: 57 [2019-09-08 03:06:56,312 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 03:06:56,313 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 03:06:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 03:06:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-08 03:06:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 03:06:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-08 03:06:56,318 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-08 03:06:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:56,318 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-08 03:06:56,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 03:06:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-08 03:06:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-08 03:06:56,319 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:56,319 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:56,319 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-09-08 03:06:56,319 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:56,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:56,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:56,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:56,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:56,327 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:56,327 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:56,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:56,340 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:06:56,829 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-08 03:06:56,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:56,833 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-08 03:06:56,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:57,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:57,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:57,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-08 03:06:57,880 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-08 03:06:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-08 03:06:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 03:06:57,881 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-08 03:06:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:59,353 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-08 03:06:59,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-08 03:06:59,353 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-08 03:06:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:59,354 INFO L225 Difference]: With dead ends: 58 [2019-09-08 03:06:59,354 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 03:06:59,354 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 03:06:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 03:06:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-08 03:06:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-08 03:06:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-08 03:06:59,361 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-08 03:06:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:59,361 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-08 03:06:59,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-08 03:06:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-08 03:06:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 03:06:59,361 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:59,361 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:59,362 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-09-08 03:06:59,362 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:59,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:59,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:59,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,370 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:59,370 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:59,370 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:59,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:59,461 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-08 03:06:59,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:00,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:00,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:00,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-08 03:07:00,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-08 03:07:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-08 03:07:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 03:07:00,617 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-08 03:07:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:02,224 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-08 03:07:02,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-08 03:07:02,225 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-08 03:07:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:02,225 INFO L225 Difference]: With dead ends: 59 [2019-09-08 03:07:02,225 INFO L226 Difference]: Without dead ends: 56 [2019-09-08 03:07:02,226 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 03:07:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-08 03:07:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-08 03:07:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-08 03:07:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-08 03:07:02,230 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-08 03:07:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:02,230 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-08 03:07:02,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-08 03:07:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-08 03:07:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 03:07:02,231 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:02,231 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:02,231 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-09-08 03:07:02,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:02,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:02,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:02,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:02,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:02,239 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:02,239 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:02,239 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:02,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:02,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:02,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:02,328 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-08 03:07:02,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:03,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:03,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:03,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-08 03:07:03,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-08 03:07:03,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-08 03:07:03,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 03:07:03,626 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-08 03:07:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:05,285 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-08 03:07:05,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-08 03:07:05,285 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-08 03:07:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:05,286 INFO L225 Difference]: With dead ends: 60 [2019-09-08 03:07:05,286 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 03:07:05,287 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 03:07:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 03:07:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-08 03:07:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 03:07:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-08 03:07:05,292 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-08 03:07:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:05,292 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-08 03:07:05,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-08 03:07:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-08 03:07:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-08 03:07:05,293 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:05,293 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:05,293 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-09-08 03:07:05,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:05,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:05,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:05,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:05,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:05,300 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:05,300 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:05,300 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:05,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:07,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-08 03:07:07,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:07,918 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-08 03:07:07,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:09,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:09,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:09,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-08 03:07:09,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-08 03:07:09,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-08 03:07:09,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 03:07:09,091 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-08 03:07:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:10,744 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-08 03:07:10,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-08 03:07:10,744 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-08 03:07:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:10,745 INFO L225 Difference]: With dead ends: 61 [2019-09-08 03:07:10,745 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 03:07:10,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:07:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 03:07:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-08 03:07:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-08 03:07:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-08 03:07:10,751 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-08 03:07:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:10,751 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-08 03:07:10,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-08 03:07:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-08 03:07:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-08 03:07:10,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:10,752 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:10,752 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:10,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-09-08 03:07:10,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:10,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:10,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:10,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:10,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:10,760 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:10,760 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:10,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:10,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:11,216 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:11,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:11,219 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-08 03:07:11,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:12,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:12,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:12,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-08 03:07:12,450 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-08 03:07:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-08 03:07:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:07:12,451 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-08 03:07:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:14,138 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-08 03:07:14,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-08 03:07:14,138 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-08 03:07:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:14,139 INFO L225 Difference]: With dead ends: 62 [2019-09-08 03:07:14,139 INFO L226 Difference]: Without dead ends: 59 [2019-09-08 03:07:14,140 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 03:07:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-08 03:07:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-08 03:07:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-08 03:07:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-08 03:07:14,145 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-08 03:07:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:14,146 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-08 03:07:14,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-08 03:07:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-08 03:07:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-08 03:07:14,146 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:14,146 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:14,146 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-09-08 03:07:14,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:14,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:14,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:14,154 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:14,154 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:14,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:14,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:07:14,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-08 03:07:14,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:14,275 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-08 03:07:14,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:15,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:15,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:15,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-08 03:07:15,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-08 03:07:15,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-08 03:07:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 03:07:15,614 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-08 03:07:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:17,425 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-08 03:07:17,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-08 03:07:17,426 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-08 03:07:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:17,427 INFO L225 Difference]: With dead ends: 63 [2019-09-08 03:07:17,427 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 03:07:17,428 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 03:07:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 03:07:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-08 03:07:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 03:07:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-08 03:07:17,434 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-08 03:07:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:17,435 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-08 03:07:17,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-08 03:07:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-08 03:07:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-08 03:07:17,435 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:17,435 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:17,436 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:17,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-09-08 03:07:17,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:17,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:17,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:17,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:17,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:17,444 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:17,444 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:17,444 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:17,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:18,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 03:07:18,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:18,104 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-08 03:07:18,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:19,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:19,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:19,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-08 03:07:19,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-08 03:07:19,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-08 03:07:19,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 03:07:19,441 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-08 03:07:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:21,275 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-08 03:07:21,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-08 03:07:21,276 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-08 03:07:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:21,277 INFO L225 Difference]: With dead ends: 64 [2019-09-08 03:07:21,277 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 03:07:21,278 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 03:07:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 03:07:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-08 03:07:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-08 03:07:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-08 03:07:21,284 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-08 03:07:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:21,284 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-08 03:07:21,284 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-08 03:07:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-08 03:07:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-08 03:07:21,285 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:21,285 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:21,285 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:21,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-09-08 03:07:21,285 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:21,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:21,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:21,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:21,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:21,293 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:21,293 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:21,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:07:21,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:21,399 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-08 03:07:21,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:22,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:22,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:22,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-08 03:07:22,799 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-08 03:07:22,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-08 03:07:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 03:07:22,800 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-08 03:07:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:24,817 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-08 03:07:24,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-08 03:07:24,818 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-08 03:07:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:24,818 INFO L225 Difference]: With dead ends: 65 [2019-09-08 03:07:24,818 INFO L226 Difference]: Without dead ends: 62 [2019-09-08 03:07:24,819 INFO L628 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 [2019-09-08 03:07:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-08 03:07:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-08 03:07:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-08 03:07:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-08 03:07:24,826 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-08 03:07:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:24,826 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-08 03:07:24,826 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-08 03:07:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-08 03:07:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 03:07:24,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:24,827 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:24,827 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-09-08 03:07:24,828 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:24,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:24,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:24,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:24,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:24,835 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:24,835 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:24,836 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:24,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:24,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:24,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:24,953 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-08 03:07:24,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:26,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:26,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:26,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-08 03:07:26,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-08 03:07:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-08 03:07:26,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 03:07:26,416 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-08 03:07:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:28,450 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-08 03:07:28,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-08 03:07:28,450 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-08 03:07:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:28,451 INFO L225 Difference]: With dead ends: 66 [2019-09-08 03:07:28,452 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 03:07:28,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 03:07:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 03:07:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-08 03:07:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 03:07:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-08 03:07:28,459 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-08 03:07:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:28,459 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-08 03:07:28,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-08 03:07:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-08 03:07:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-08 03:07:28,460 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:28,460 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:28,460 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-09-08 03:07:28,461 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:28,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:28,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:28,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:28,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:28,469 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:28,470 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:28,470 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:28,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:32,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-08 03:07:32,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:32,625 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-08 03:07:32,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:34,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:34,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:34,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-08 03:07:34,116 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 03:07:34,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 03:07:34,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 03:07:34,117 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-08 03:07:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:36,154 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-08 03:07:36,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-08 03:07:36,155 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-08 03:07:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:36,156 INFO L225 Difference]: With dead ends: 67 [2019-09-08 03:07:36,156 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 03:07:36,157 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 03:07:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 03:07:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-08 03:07:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-08 03:07:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-08 03:07:36,164 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-08 03:07:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:36,165 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-08 03:07:36,165 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 03:07:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-08 03:07:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-08 03:07:36,165 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:36,165 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:36,166 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-09-08 03:07:36,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:36,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:36,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:36,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:36,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:36,174 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:36,174 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:36,175 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:36,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:36,702 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:36,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:36,706 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-08 03:07:36,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:38,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:38,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:38,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-08 03:07:38,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-08 03:07:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-08 03:07:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 03:07:38,271 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-08 03:07:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:40,441 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-08 03:07:40,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-08 03:07:40,441 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-08 03:07:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:40,442 INFO L225 Difference]: With dead ends: 68 [2019-09-08 03:07:40,442 INFO L226 Difference]: Without dead ends: 65 [2019-09-08 03:07:40,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 03:07:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-08 03:07:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-08 03:07:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-08 03:07:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-08 03:07:40,450 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-08 03:07:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:40,451 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-08 03:07:40,451 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-08 03:07:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-08 03:07:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-08 03:07:40,451 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:40,451 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:40,452 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-09-08 03:07:40,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:40,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:40,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:40,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:40,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:40,460 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:40,460 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:40,460 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:40,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:40,629 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-08 03:07:40,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:40,634 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-08 03:07:40,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:42,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:42,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:42,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-08 03:07:42,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-08 03:07:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-08 03:07:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 03:07:42,176 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-08 03:07:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:44,414 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-08 03:07:44,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-08 03:07:44,414 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-08 03:07:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:44,415 INFO L225 Difference]: With dead ends: 69 [2019-09-08 03:07:44,415 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 03:07:44,415 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 03:07:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 03:07:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-08 03:07:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 03:07:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-08 03:07:44,421 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-08 03:07:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:44,421 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-08 03:07:44,421 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-08 03:07:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-08 03:07:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-08 03:07:44,422 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:44,422 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:44,422 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-09-08 03:07:44,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:44,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:44,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:44,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:44,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:44,434 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:44,434 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:44,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:44,443 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:45,648 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-08 03:07:45,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:45,654 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-08 03:07:45,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:47,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:47,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:47,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-08 03:07:47,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-08 03:07:47,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-08 03:07:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 03:07:47,328 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-08 03:07:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:49,728 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-08 03:07:49,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-08 03:07:49,728 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-08 03:07:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:49,729 INFO L225 Difference]: With dead ends: 70 [2019-09-08 03:07:49,729 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 03:07:49,730 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 03:07:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 03:07:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-08 03:07:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-08 03:07:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-08 03:07:49,735 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-08 03:07:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:49,736 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-08 03:07:49,736 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-08 03:07:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-08 03:07:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-08 03:07:49,737 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:49,737 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:49,737 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-09-08 03:07:49,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:49,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:49,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:49,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:49,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:49,745 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:49,745 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:49,745 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:49,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:49,936 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-08 03:07:49,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:51,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:51,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:51,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-08 03:07:51,595 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-08 03:07:51,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-08 03:07:51,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 03:07:51,596 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-08 03:07:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:54,056 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-08 03:07:54,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-08 03:07:54,056 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-08 03:07:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:54,057 INFO L225 Difference]: With dead ends: 71 [2019-09-08 03:07:54,057 INFO L226 Difference]: Without dead ends: 68 [2019-09-08 03:07:54,057 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 03:07:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-08 03:07:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-08 03:07:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 03:07:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-08 03:07:54,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-08 03:07:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:54,064 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-08 03:07:54,064 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-08 03:07:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-08 03:07:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 03:07:54,065 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:54,065 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:54,065 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-09-08 03:07:54,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:54,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:54,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:54,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:54,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:54,073 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:54,074 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:54,074 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:54,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:54,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:54,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:54,204 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-08 03:07:54,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:55,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:55,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:55,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-08 03:07:55,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-08 03:07:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-08 03:07:55,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 03:07:55,950 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-08 03:07:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:58,357 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-08 03:07:58,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-08 03:07:58,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-08 03:07:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:58,358 INFO L225 Difference]: With dead ends: 72 [2019-09-08 03:07:58,359 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 03:07:58,359 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 03:07:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 03:07:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-08 03:07:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 03:07:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-08 03:07:58,365 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-08 03:07:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:58,365 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-08 03:07:58,365 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-08 03:07:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-08 03:07:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 03:07:58,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:58,366 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:58,366 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:58,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-09-08 03:07:58,366 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:58,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:58,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:58,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:58,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:58,374 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:58,374 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:58,374 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:58,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:08:05,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-08 03:08:05,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:05,478 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-08 03:08:05,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:07,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:07,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:07,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-08 03:08:07,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-08 03:08:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-08 03:08:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 03:08:07,259 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-08 03:08:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:09,804 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-08 03:08:09,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-08 03:08:09,804 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-08 03:08:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:09,805 INFO L225 Difference]: With dead ends: 73 [2019-09-08 03:08:09,805 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 03:08:09,806 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 03:08:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 03:08:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-08 03:08:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-08 03:08:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-08 03:08:09,813 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-08 03:08:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:09,813 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-08 03:08:09,813 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-08 03:08:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-08 03:08:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-08 03:08:09,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:09,814 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:09,814 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:09,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-09-08 03:08:09,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:09,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:09,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:09,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:09,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:09,822 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:09,822 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:09,822 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:09,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:08:10,469 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:08:10,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:10,473 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-08 03:08:10,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:12,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:12,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:12,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-08 03:08:12,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-08 03:08:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-08 03:08:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 03:08:12,328 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-08 03:08:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:15,015 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-08 03:08:15,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-08 03:08:15,015 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-08 03:08:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:15,016 INFO L225 Difference]: With dead ends: 74 [2019-09-08 03:08:15,016 INFO L226 Difference]: Without dead ends: 71 [2019-09-08 03:08:15,017 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 03:08:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-08 03:08:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-08 03:08:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-08 03:08:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-08 03:08:15,023 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-08 03:08:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:15,023 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-08 03:08:15,023 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-08 03:08:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-08 03:08:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-08 03:08:15,024 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:15,024 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:15,024 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-09-08 03:08:15,024 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:15,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:15,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:15,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:15,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:15,032 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:15,033 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:15,033 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:08:15,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:15,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-08 03:08:15,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:15,242 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-08 03:08:15,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:17,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:17,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:17,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-08 03:08:17,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-08 03:08:17,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-08 03:08:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 03:08:17,175 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-08 03:08:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:19,925 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-08 03:08:19,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-08 03:08:19,926 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-08 03:08:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:19,927 INFO L225 Difference]: With dead ends: 75 [2019-09-08 03:08:19,927 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 03:08:19,928 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-08 03:08:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 03:08:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-08 03:08:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 03:08:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-08 03:08:19,934 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-08 03:08:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:19,934 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-08 03:08:19,934 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-08 03:08:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-08 03:08:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-08 03:08:19,935 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:19,935 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:19,935 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-09-08 03:08:19,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:19,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:19,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:19,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:19,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:19,943 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:19,943 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:19,943 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:19,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:08:21,703 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-08 03:08:21,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:21,710 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-08 03:08:21,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:23,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:23,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:23,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-08 03:08:23,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-08 03:08:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-08 03:08:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-08 03:08:23,645 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-08 03:08:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:26,403 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-08 03:08:26,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-08 03:08:26,403 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-08 03:08:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:26,404 INFO L225 Difference]: With dead ends: 76 [2019-09-08 03:08:26,404 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 03:08:26,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 03:08:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 03:08:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-08 03:08:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-08 03:08:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-08 03:08:26,412 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-08 03:08:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:26,412 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-08 03:08:26,412 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-08 03:08:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-08 03:08:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-08 03:08:26,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:26,413 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:26,413 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-09-08 03:08:26,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:26,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:26,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:26,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:26,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:26,421 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:26,421 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:26,422 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:08:26,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:08:26,586 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-08 03:08:26,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:28,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:28,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:28,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-08 03:08:28,613 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-08 03:08:28,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-08 03:08:28,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 03:08:28,615 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-08 03:08:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:31,509 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-08 03:08:31,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-08 03:08:31,509 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-08 03:08:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:31,510 INFO L225 Difference]: With dead ends: 77 [2019-09-08 03:08:31,510 INFO L226 Difference]: Without dead ends: 74 [2019-09-08 03:08:31,510 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 03:08:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-08 03:08:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-08 03:08:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-08 03:08:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-08 03:08:31,517 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-08 03:08:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:31,518 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-08 03:08:31,518 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-08 03:08:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-08 03:08:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-08 03:08:31,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:31,518 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:31,519 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:31,519 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-09-08 03:08:31,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:31,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:31,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:31,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:31,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:31,527 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:31,527 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:31,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:31,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:08:31,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:08:31,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:31,699 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-08 03:08:31,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:33,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:33,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:33,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-08 03:08:33,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-08 03:08:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-08 03:08:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 03:08:33,779 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-08 03:08:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:36,783 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-08 03:08:36,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-08 03:08:36,783 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-08 03:08:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:36,784 INFO L225 Difference]: With dead ends: 78 [2019-09-08 03:08:36,784 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 03:08:36,784 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 03:08:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 03:08:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-08 03:08:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 03:08:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-08 03:08:36,791 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-08 03:08:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:36,791 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-08 03:08:36,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-08 03:08:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-08 03:08:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-08 03:08:36,797 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:36,798 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:36,798 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-09-08 03:08:36,798 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:36,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:36,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:36,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:36,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:36,805 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:36,805 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:36,805 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:36,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:08:48,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-08 03:08:48,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:48,381 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-08 03:08:48,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:50,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:50,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:50,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-08 03:08:50,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-08 03:08:50,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-08 03:08:50,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 03:08:50,577 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-08 03:08:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:53,702 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-08 03:08:53,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-08 03:08:53,703 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-08 03:08:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:53,703 INFO L225 Difference]: With dead ends: 79 [2019-09-08 03:08:53,704 INFO L226 Difference]: Without dead ends: 76 [2019-09-08 03:08:53,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 03:08:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-08 03:08:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-08 03:08:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-08 03:08:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-08 03:08:53,711 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-08 03:08:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:53,711 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-08 03:08:53,711 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-08 03:08:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-08 03:08:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-08 03:08:53,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:53,712 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:53,712 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-09-08 03:08:53,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:53,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:53,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:53,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:53,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:53,721 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:53,721 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:53,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:53,734 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:08:54,499 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:08:54,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:54,503 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-08 03:08:54,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:56,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:56,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:56,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-08 03:08:56,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-08 03:08:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-08 03:08:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 03:08:56,718 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-08 03:08:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:59,823 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-08 03:08:59,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-08 03:08:59,823 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-08 03:08:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:59,824 INFO L225 Difference]: With dead ends: 80 [2019-09-08 03:08:59,825 INFO L226 Difference]: Without dead ends: 77 [2019-09-08 03:08:59,825 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 03:08:59,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-08 03:08:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-08 03:08:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 03:08:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-08 03:08:59,834 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-08 03:08:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:59,835 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-08 03:08:59,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-08 03:08:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-08 03:08:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-08 03:08:59,835 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:59,835 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:59,836 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:59,836 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-09-08 03:08:59,836 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:59,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:59,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:59,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:59,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:59,845 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:59,846 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:59,846 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:59,874 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:09:00,342 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-08 03:09:00,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:00,353 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-08 03:09:00,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:02,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:02,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:02,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-08 03:09:02,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-08 03:09:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-08 03:09:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 03:09:02,935 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-08 03:09:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:06,242 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-08 03:09:06,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-08 03:09:06,242 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-08 03:09:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:06,243 INFO L225 Difference]: With dead ends: 81 [2019-09-08 03:09:06,243 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 03:09:06,243 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-08 03:09:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 03:09:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 03:09:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 03:09:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-08 03:09:06,251 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-08 03:09:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:06,251 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-08 03:09:06,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-08 03:09:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-08 03:09:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-08 03:09:06,252 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:06,252 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:06,252 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-09-08 03:09:06,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:06,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:06,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:06,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:06,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:06,262 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:06,262 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:06,262 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:06,289 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:09:09,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-08 03:09:09,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:09,245 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-08 03:09:09,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:11,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:11,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:11,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-08 03:09:11,609 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-08 03:09:11,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-08 03:09:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-08 03:09:11,609 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-08 03:09:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:14,980 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-08 03:09:14,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-08 03:09:14,980 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-08 03:09:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:14,981 INFO L225 Difference]: With dead ends: 82 [2019-09-08 03:09:14,981 INFO L226 Difference]: Without dead ends: 79 [2019-09-08 03:09:14,982 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 03:09:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-08 03:09:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-08 03:09:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-08 03:09:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-08 03:09:14,990 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-08 03:09:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:14,990 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-08 03:09:14,990 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-08 03:09:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-08 03:09:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-08 03:09:14,991 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:14,991 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:14,991 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:14,991 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-09-08 03:09:14,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:14,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:14,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:14,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:14,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:15,004 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:15,004 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:15,004 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:15,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:09:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:09:15,217 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-08 03:09:15,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:17,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:17,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:17,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-08 03:09:17,733 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-08 03:09:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-08 03:09:17,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 03:09:17,734 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-08 03:09:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:21,197 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-08 03:09:21,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-08 03:09:21,198 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-08 03:09:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:21,199 INFO L225 Difference]: With dead ends: 83 [2019-09-08 03:09:21,199 INFO L226 Difference]: Without dead ends: 80 [2019-09-08 03:09:21,199 INFO L628 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 [2019-09-08 03:09:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-08 03:09:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-08 03:09:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-08 03:09:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-08 03:09:21,209 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-08 03:09:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:21,209 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-08 03:09:21,209 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-08 03:09:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-08 03:09:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 03:09:21,210 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:21,210 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:21,210 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-09-08 03:09:21,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:21,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:21,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:21,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:09:21,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:21,219 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:21,219 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:21,219 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:21,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:09:21,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:09:21,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:21,439 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-08 03:09:21,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:23,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:23,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:23,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-08 03:09:23,914 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-08 03:09:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-08 03:09:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-08 03:09:23,915 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-08 03:09:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:27,545 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-08 03:09:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-08 03:09:27,545 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-08 03:09:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:27,546 INFO L225 Difference]: With dead ends: 84 [2019-09-08 03:09:27,547 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 03:09:27,547 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 03:09:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 03:09:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-08 03:09:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 03:09:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-08 03:09:27,554 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-08 03:09:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:27,554 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-08 03:09:27,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-08 03:09:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-08 03:09:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-08 03:09:27,554 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:27,555 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:27,555 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-09-08 03:09:27,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:27,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:27,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:27,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:27,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:27,563 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:27,563 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:27,563 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:09:27,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:45,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-08 03:09:45,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:45,649 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-08 03:09:45,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:48,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:48,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:48,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-08 03:09:48,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-08 03:09:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-08 03:09:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 03:09:48,245 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-08 03:09:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:52,011 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-08 03:09:52,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-08 03:09:52,011 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-08 03:09:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:52,012 INFO L225 Difference]: With dead ends: 85 [2019-09-08 03:09:52,012 INFO L226 Difference]: Without dead ends: 82 [2019-09-08 03:09:52,012 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 03:09:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-08 03:09:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-08 03:09:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-08 03:09:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-08 03:09:52,021 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-08 03:09:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:52,021 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-08 03:09:52,021 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-08 03:09:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-08 03:09:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-08 03:09:52,022 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:52,022 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:52,022 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-09-08 03:09:52,023 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:52,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:52,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:52,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:52,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:52,030 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:52,030 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:52,030 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:52,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:09:52,926 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:09:52,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:52,931 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-08 03:09:52,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:55,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:55,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:55,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-08 03:09:55,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-08 03:09:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-08 03:09:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 03:09:55,551 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-08 03:09:59,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:59,307 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-08 03:09:59,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-08 03:09:59,307 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-08 03:09:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:59,308 INFO L225 Difference]: With dead ends: 86 [2019-09-08 03:09:59,308 INFO L226 Difference]: Without dead ends: 83 [2019-09-08 03:09:59,309 INFO L628 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 [2019-09-08 03:09:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-08 03:09:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-08 03:09:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-08 03:09:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-08 03:09:59,316 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-08 03:09:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:59,316 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-08 03:09:59,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-08 03:09:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-08 03:09:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-08 03:09:59,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:59,317 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:59,317 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:59,318 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-09-08 03:09:59,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:59,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:59,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:59,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:59,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:59,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:59,326 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:59,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:59,362 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:09:59,757 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-08 03:09:59,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:59,762 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-08 03:09:59,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:02,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:02,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:02,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-08 03:10:02,588 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-08 03:10:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-08 03:10:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 03:10:02,589 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-08 03:10:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:06,564 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-08 03:10:06,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-08 03:10:06,565 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-08 03:10:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:06,565 INFO L225 Difference]: With dead ends: 87 [2019-09-08 03:10:06,566 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 03:10:06,566 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 03:10:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 03:10:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-08 03:10:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 03:10:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-08 03:10:06,575 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-08 03:10:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:06,576 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-08 03:10:06,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-08 03:10:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-08 03:10:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-08 03:10:06,576 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:06,577 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:06,577 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-09-08 03:10:06,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:06,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:06,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:06,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:06,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:06,586 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:06,587 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:06,587 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:06,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:10:10,885 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-08 03:10:10,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:10,892 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-08 03:10:10,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:14,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:14,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:14,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-08 03:10:14,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-08 03:10:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-08 03:10:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 03:10:14,101 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-08 03:10:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:18,044 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-08 03:10:18,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-08 03:10:18,044 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-08 03:10:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:18,045 INFO L225 Difference]: With dead ends: 88 [2019-09-08 03:10:18,045 INFO L226 Difference]: Without dead ends: 85 [2019-09-08 03:10:18,045 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 03:10:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-08 03:10:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-08 03:10:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-08 03:10:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-08 03:10:18,052 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-08 03:10:18,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:18,053 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-08 03:10:18,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-08 03:10:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-08 03:10:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-08 03:10:18,053 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:18,053 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:18,053 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:18,054 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-09-08 03:10:18,054 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:18,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:18,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:18,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:18,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:18,073 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:18,073 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:18,073 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:10:18,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:10:18,315 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-08 03:10:18,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:21,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:21,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:21,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-08 03:10:21,230 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-08 03:10:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-08 03:10:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 03:10:21,231 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-08 03:10:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:25,355 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-08 03:10:25,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-08 03:10:25,355 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-08 03:10:25,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:25,356 INFO L225 Difference]: With dead ends: 89 [2019-09-08 03:10:25,356 INFO L226 Difference]: Without dead ends: 86 [2019-09-08 03:10:25,357 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 03:10:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-08 03:10:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-08 03:10:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-08 03:10:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-08 03:10:25,379 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-08 03:10:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:25,379 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-08 03:10:25,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-08 03:10:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-08 03:10:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 03:10:25,380 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:25,380 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:25,380 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-09-08 03:10:25,380 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:25,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:25,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:25,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:10:25,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:25,388 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:25,388 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:25,388 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:25,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:10:25,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:10:25,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:25,639 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-08 03:10:25,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:28,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:28,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:28,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-08 03:10:28,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-08 03:10:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-08 03:10:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 03:10:28,591 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-08 03:10:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:32,788 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-08 03:10:32,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-08 03:10:32,788 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-08 03:10:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:32,789 INFO L225 Difference]: With dead ends: 90 [2019-09-08 03:10:32,789 INFO L226 Difference]: Without dead ends: 87 [2019-09-08 03:10:32,789 INFO L628 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 [2019-09-08 03:10:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-08 03:10:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-08 03:10:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 03:10:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-08 03:10:32,799 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-08 03:10:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:32,799 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-08 03:10:32,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-08 03:10:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-08 03:10:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-08 03:10:32,800 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:32,800 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:32,800 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-09-08 03:10:32,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:32,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:32,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:32,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:32,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:32,808 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:32,809 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:32,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:32,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:10:58,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-08 03:10:58,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:58,137 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-08 03:10:58,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:01,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:01,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:01,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-08 03:11:01,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-08 03:11:01,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-08 03:11:01,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 03:11:01,101 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-08 03:11:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:05,338 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-08 03:11:05,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-08 03:11:05,338 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-08 03:11:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:05,340 INFO L225 Difference]: With dead ends: 91 [2019-09-08 03:11:05,340 INFO L226 Difference]: Without dead ends: 88 [2019-09-08 03:11:05,340 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-08 03:11:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-08 03:11:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-08 03:11:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-08 03:11:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-08 03:11:05,350 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-08 03:11:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:05,350 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-08 03:11:05,350 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-08 03:11:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-08 03:11:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-08 03:11:05,351 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:05,351 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:05,351 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:05,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-09-08 03:11:05,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:05,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:05,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:05,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:05,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:05,361 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:05,361 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:05,361 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:05,385 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:11:06,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:11:06,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:06,579 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-08 03:11:06,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:10,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:10,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:10,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-08 03:11:10,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-08 03:11:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-08 03:11:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-08 03:11:10,110 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-08 03:11:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:14,524 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-08 03:11:14,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-08 03:11:14,524 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-08 03:11:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:14,525 INFO L225 Difference]: With dead ends: 92 [2019-09-08 03:11:14,525 INFO L226 Difference]: Without dead ends: 89 [2019-09-08 03:11:14,526 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 03:11:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-08 03:11:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-08 03:11:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-08 03:11:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-08 03:11:14,534 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-08 03:11:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:14,534 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-08 03:11:14,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-08 03:11:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-08 03:11:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-08 03:11:14,534 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:14,534 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:14,535 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-09-08 03:11:14,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:14,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:14,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:14,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:14,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:14,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:14,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:14,543 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:14,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:11:14,922 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-08 03:11:14,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:14,929 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-08 03:11:14,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:17,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:18,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:18,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-08 03:11:18,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-08 03:11:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-08 03:11:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 03:11:18,076 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-08 03:11:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:22,641 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-08 03:11:22,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-08 03:11:22,642 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-08 03:11:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:22,643 INFO L225 Difference]: With dead ends: 93 [2019-09-08 03:11:22,643 INFO L226 Difference]: Without dead ends: 90 [2019-09-08 03:11:22,644 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 03:11:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-08 03:11:22,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-08 03:11:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-08 03:11:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-08 03:11:22,651 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-08 03:11:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:22,651 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-08 03:11:22,652 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-08 03:11:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-08 03:11:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-08 03:11:22,652 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:22,652 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:22,653 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-09-08 03:11:22,653 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:22,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:22,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:22,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:22,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:22,662 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:22,662 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:22,663 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:11:22,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:28,691 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-08 03:11:28,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:28,701 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-08 03:11:28,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:31,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:31,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:31,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-08 03:11:31,946 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-08 03:11:31,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-08 03:11:31,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 03:11:31,947 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-08 03:11:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:36,686 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-08 03:11:36,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-08 03:11:36,687 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-08 03:11:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:36,687 INFO L225 Difference]: With dead ends: 94 [2019-09-08 03:11:36,687 INFO L226 Difference]: Without dead ends: 91 [2019-09-08 03:11:36,688 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 03:11:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-08 03:11:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-08 03:11:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-08 03:11:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-08 03:11:36,695 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-08 03:11:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:36,695 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-08 03:11:36,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-08 03:11:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-08 03:11:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-08 03:11:36,695 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:36,695 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:36,696 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:36,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-09-08 03:11:36,696 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:36,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:36,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:36,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:36,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:36,704 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:36,705 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:36,705 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:11:36,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:11:37,069 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-08 03:11:37,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:40,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:40,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:40,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-08 03:11:40,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-08 03:11:40,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-08 03:11:40,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 03:11:40,465 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-08 03:11:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:45,022 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-08 03:11:45,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-08 03:11:45,023 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-08 03:11:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:45,023 INFO L225 Difference]: With dead ends: 95 [2019-09-08 03:11:45,024 INFO L226 Difference]: Without dead ends: 92 [2019-09-08 03:11:45,024 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 03:11:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-08 03:11:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-08 03:11:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-08 03:11:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-08 03:11:45,033 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-08 03:11:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:45,033 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-08 03:11:45,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-08 03:11:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-08 03:11:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 03:11:45,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:45,034 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:45,034 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-09-08 03:11:45,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:45,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:45,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:45,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:11:45,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:45,042 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:45,043 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:45,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:45,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:11:45,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:11:45,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:45,354 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-08 03:11:45,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:48,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:48,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:48,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-08 03:11:48,657 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-08 03:11:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-08 03:11:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 03:11:48,657 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-08 03:11:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:53,440 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-08 03:11:53,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-08 03:11:53,440 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-08 03:11:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:53,441 INFO L225 Difference]: With dead ends: 96 [2019-09-08 03:11:53,441 INFO L226 Difference]: Without dead ends: 93 [2019-09-08 03:11:53,442 INFO L628 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 [2019-09-08 03:11:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-08 03:11:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-08 03:11:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-08 03:11:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-08 03:11:53,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-08 03:11:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:53,450 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-08 03:11:53,450 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-08 03:11:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-08 03:11:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-08 03:11:53,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:53,450 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:53,451 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:53,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-09-08 03:11:53,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:53,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:53,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:53,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:53,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:53,458 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:53,458 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:53,458 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:53,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:12:29,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-08 03:12:29,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:29,649 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-08 03:12:29,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:32,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:33,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:33,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-08 03:12:33,065 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-08 03:12:33,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-08 03:12:33,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 03:12:33,066 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-08 03:12:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:37,980 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-08 03:12:37,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-08 03:12:37,980 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-08 03:12:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:37,981 INFO L225 Difference]: With dead ends: 97 [2019-09-08 03:12:37,981 INFO L226 Difference]: Without dead ends: 94 [2019-09-08 03:12:37,982 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 03:12:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-08 03:12:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-08 03:12:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-08 03:12:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-08 03:12:37,991 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-08 03:12:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:37,991 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-08 03:12:37,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-08 03:12:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-08 03:12:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 03:12:37,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:37,992 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:37,992 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-09-08 03:12:37,993 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:37,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:37,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:37,999 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:37,999 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:37,999 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:12:38,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:39,187 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:12:39,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:39,192 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-08 03:12:39,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:42,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:42,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:42,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-08 03:12:42,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-08 03:12:42,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-08 03:12:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 03:12:42,628 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-08 03:12:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:47,661 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-08 03:12:47,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-08 03:12:47,662 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-08 03:12:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:47,662 INFO L225 Difference]: With dead ends: 98 [2019-09-08 03:12:47,662 INFO L226 Difference]: Without dead ends: 95 [2019-09-08 03:12:47,663 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 03:12:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-08 03:12:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-08 03:12:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-08 03:12:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-08 03:12:47,671 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-08 03:12:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:47,671 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-08 03:12:47,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-08 03:12:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-08 03:12:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-08 03:12:47,672 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:47,672 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:47,672 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-09-08 03:12:47,672 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:47,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:47,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:47,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:47,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:47,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:47,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:47,678 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:47,688 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:12:48,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-08 03:12:48,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:48,130 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-08 03:12:48,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:51,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:51,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:51,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-08 03:12:51,730 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 03:12:51,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 03:12:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 03:12:51,731 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-08 03:12:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:57,035 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-08 03:12:57,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-08 03:12:57,036 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-08 03:12:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:57,037 INFO L225 Difference]: With dead ends: 99 [2019-09-08 03:12:57,037 INFO L226 Difference]: Without dead ends: 96 [2019-09-08 03:12:57,037 INFO L628 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 [2019-09-08 03:12:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-08 03:12:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-08 03:12:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-08 03:12:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-08 03:12:57,046 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-08 03:12:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:57,046 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-08 03:12:57,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 03:12:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-08 03:12:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-08 03:12:57,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:57,047 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:57,047 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-09-08 03:12:57,047 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:57,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:57,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:57,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:57,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:57,056 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:57,056 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:57,056 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:57,088 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:13:04,372 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-08 03:13:04,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:04,383 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-08 03:13:04,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:07,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:08,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:08,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-08 03:13:08,073 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-08 03:13:08,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-08 03:13:08,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 03:13:08,074 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-08 03:13:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:13,468 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-08 03:13:13,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-08 03:13:13,468 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-08 03:13:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:13,469 INFO L225 Difference]: With dead ends: 100 [2019-09-08 03:13:13,469 INFO L226 Difference]: Without dead ends: 97 [2019-09-08 03:13:13,470 INFO L628 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 [2019-09-08 03:13:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-08 03:13:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-08 03:13:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-08 03:13:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-08 03:13:13,479 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-08 03:13:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:13,479 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-08 03:13:13,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-08 03:13:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-08 03:13:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 03:13:13,480 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:13,480 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:13,480 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:13,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-09-08 03:13:13,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:13,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:13,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:13,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:13,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:13,490 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:13,490 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:13,490 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:13,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:13:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:13,847 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-08 03:13:13,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:17,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:17,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:17,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-08 03:13:17,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-08 03:13:17,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-08 03:13:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 03:13:17,631 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-08 03:13:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:23,228 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-08 03:13:23,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-08 03:13:23,228 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-08 03:13:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:23,229 INFO L225 Difference]: With dead ends: 101 [2019-09-08 03:13:23,230 INFO L226 Difference]: Without dead ends: 98 [2019-09-08 03:13:23,230 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 03:13:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-08 03:13:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-08 03:13:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-08 03:13:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-08 03:13:23,240 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-08 03:13:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:23,240 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-08 03:13:23,240 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-08 03:13:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-08 03:13:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-08 03:13:23,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:23,241 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:23,242 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-09-08 03:13:23,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:23,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:23,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:23,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:13:23,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:23,251 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:23,251 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:23,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:23,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:13:23,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:13:23,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:23,632 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-08 03:13:23,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:27,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:27,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:27,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-08 03:13:27,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-08 03:13:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-08 03:13:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 03:13:27,442 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-08 03:13:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:32,940 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-08 03:13:32,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-08 03:13:32,940 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-08 03:13:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:32,941 INFO L225 Difference]: With dead ends: 102 [2019-09-08 03:13:32,941 INFO L226 Difference]: Without dead ends: 99 [2019-09-08 03:13:32,941 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 03:13:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-08 03:13:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-08 03:13:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-08 03:13:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-08 03:13:32,948 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-08 03:13:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:32,948 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-08 03:13:32,949 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-08 03:13:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-08 03:13:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-08 03:13:32,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:32,949 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:32,949 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:32,949 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-09-08 03:13:32,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:32,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:32,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:32,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:32,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:32,958 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:32,958 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:32,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:32,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:14:24,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-08 03:14:24,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:24,199 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-08 03:14:24,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:28,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:28,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:28,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-08 03:14:28,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-08 03:14:28,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-08 03:14:28,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 03:14:28,127 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-08 03:14:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:33,847 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-08 03:14:33,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-08 03:14:33,847 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-08 03:14:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:33,848 INFO L225 Difference]: With dead ends: 103 [2019-09-08 03:14:33,848 INFO L226 Difference]: Without dead ends: 100 [2019-09-08 03:14:33,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 03:14:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-08 03:14:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-08 03:14:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-08 03:14:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-08 03:14:33,857 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-08 03:14:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:33,857 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-08 03:14:33,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-08 03:14:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-08 03:14:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-08 03:14:33,857 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:33,857 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:33,858 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-09-08 03:14:33,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:33,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:33,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:33,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:33,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:33,879 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:33,879 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:33,879 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:33,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:14:35,228 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:14:35,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:35,234 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-08 03:14:35,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:39,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:39,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:39,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-08 03:14:39,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-08 03:14:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-08 03:14:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 03:14:39,154 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-08 03:14:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:44,938 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-08 03:14:44,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-08 03:14:44,938 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-08 03:14:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:44,938 INFO L225 Difference]: With dead ends: 104 [2019-09-08 03:14:44,939 INFO L226 Difference]: Without dead ends: 101 [2019-09-08 03:14:44,939 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 03:14:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-08 03:14:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-08 03:14:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-08 03:14:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-08 03:14:44,947 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-08 03:14:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:44,947 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-08 03:14:44,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-08 03:14:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-08 03:14:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 03:14:44,948 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:44,948 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:44,948 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:44,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-09-08 03:14:44,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:44,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:44,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:44,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:44,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:44,958 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:44,958 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:44,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:44,967 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:14:45,501 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-08 03:14:45,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:45,507 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-08 03:14:45,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:49,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:49,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:49,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-08 03:14:49,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-08 03:14:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-08 03:14:49,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 03:14:49,707 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-08 03:14:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:55,834 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-08 03:14:55,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-08 03:14:55,835 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-08 03:14:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:55,836 INFO L225 Difference]: With dead ends: 105 [2019-09-08 03:14:55,836 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 03:14:55,836 INFO L628 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 [2019-09-08 03:14:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 03:14:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-08 03:14:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-08 03:14:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-08 03:14:55,844 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-08 03:14:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:55,844 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-08 03:14:55,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-08 03:14:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-08 03:14:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-08 03:14:55,845 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:55,845 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:55,845 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-09-08 03:14:55,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:55,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:55,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:55,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:55,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:55,853 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:55,853 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:55,853 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:55,864 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:15:07,883 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-08 03:15:07,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:07,895 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-08 03:15:07,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:11,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:12,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:12,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-08 03:15:12,093 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-08 03:15:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-08 03:15:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-08 03:15:12,094 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-08 03:15:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:18,222 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-08 03:15:18,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-08 03:15:18,222 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-08 03:15:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:18,223 INFO L225 Difference]: With dead ends: 106 [2019-09-08 03:15:18,223 INFO L226 Difference]: Without dead ends: 103 [2019-09-08 03:15:18,224 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 03:15:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-08 03:15:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-08 03:15:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-08 03:15:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-08 03:15:18,232 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-08 03:15:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:18,233 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-08 03:15:18,233 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-08 03:15:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-08 03:15:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-08 03:15:18,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:18,233 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:18,233 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-09-08 03:15:18,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:18,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:18,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:18,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:15:18,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:18,242 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:18,242 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:18,242 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:18,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:15:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:15:18,661 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-08 03:15:18,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:22,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:22,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:22,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-08 03:15:22,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 03:15:22,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 03:15:22,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 03:15:22,890 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-08 03:15:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:29,226 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-08 03:15:29,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-08 03:15:29,227 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-08 03:15:29,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:29,228 INFO L225 Difference]: With dead ends: 107 [2019-09-08 03:15:29,228 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 03:15:29,229 INFO L628 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 [2019-09-08 03:15:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 03:15:29,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-08 03:15:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-08 03:15:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-08 03:15:29,240 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-08 03:15:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:29,240 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-08 03:15:29,240 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 03:15:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-08 03:15:29,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-08 03:15:29,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:29,241 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:29,241 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-09-08 03:15:29,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:29,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:29,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:29,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:15:29,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:29,250 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:29,251 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:29,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:29,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:15:29,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:15:29,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:29,661 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-08 03:15:29,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:33,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:34,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:34,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-08 03:15:34,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-08 03:15:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-08 03:15:34,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 03:15:34,022 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-08 03:15:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:40,393 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-08 03:15:40,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-08 03:15:40,394 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-08 03:15:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:40,395 INFO L225 Difference]: With dead ends: 108 [2019-09-08 03:15:40,395 INFO L226 Difference]: Without dead ends: 105 [2019-09-08 03:15:40,395 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 03:15:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-08 03:15:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-08 03:15:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-08 03:15:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-08 03:15:40,407 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-08 03:15:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:40,407 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-08 03:15:40,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-08 03:15:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-08 03:15:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-08 03:15:40,408 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:40,408 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:40,409 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-09-08 03:15:40,409 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:40,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:40,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:40,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:15:40,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:40,418 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:40,418 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:40,418 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:15:40,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:51,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-08 03:16:51,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:16:51,230 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-08 03:16:51,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:55,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:16:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:55,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:16:55,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-08 03:16:55,690 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-08 03:16:55,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-08 03:16:55,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 03:16:55,691 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-08 03:17:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:02,171 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-08 03:17:02,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-08 03:17:02,172 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-08 03:17:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:02,173 INFO L225 Difference]: With dead ends: 109 [2019-09-08 03:17:02,173 INFO L226 Difference]: Without dead ends: 106 [2019-09-08 03:17:02,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 03:17:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-08 03:17:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-08 03:17:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-08 03:17:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-08 03:17:02,185 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-08 03:17:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:02,186 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-08 03:17:02,186 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-08 03:17:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-08 03:17:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-08 03:17:02,187 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:02,187 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:02,187 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-09-08 03:17:02,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:02,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:02,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:02,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:02,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:02,196 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:17:02,196 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:17:02,196 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:17:02,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:17:03,714 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:17:03,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:03,720 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-08 03:17:03,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:08,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:08,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:08,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-08 03:17:08,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-08 03:17:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-08 03:17:08,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 03:17:08,212 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-08 03:17:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:14,796 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-08 03:17:14,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-08 03:17:14,797 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-08 03:17:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:14,797 INFO L225 Difference]: With dead ends: 110 [2019-09-08 03:17:14,798 INFO L226 Difference]: Without dead ends: 107 [2019-09-08 03:17:14,798 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 03:17:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-08 03:17:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-08 03:17:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-08 03:17:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-08 03:17:14,810 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-08 03:17:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:14,810 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-08 03:17:14,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-08 03:17:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-08 03:17:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-08 03:17:14,811 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:14,811 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:14,812 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-09-08 03:17:14,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:14,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:14,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:14,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:14,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:14,820 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:17:14,821 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:17:14,821 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:17:14,849 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:17:15,428 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-08 03:17:15,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:15,434 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-08 03:17:15,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:19,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:20,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:20,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-08 03:17:20,048 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-08 03:17:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-08 03:17:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 03:17:20,049 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-08 03:17:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:26,711 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-08 03:17:26,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-08 03:17:26,712 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-08 03:17:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:26,713 INFO L225 Difference]: With dead ends: 111 [2019-09-08 03:17:26,713 INFO L226 Difference]: Without dead ends: 108 [2019-09-08 03:17:26,714 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 03:17:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-08 03:17:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-08 03:17:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-08 03:17:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-08 03:17:26,726 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-08 03:17:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:26,726 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-08 03:17:26,726 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-08 03:17:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-08 03:17:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 03:17:26,727 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:26,727 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:26,727 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-09-08 03:17:26,728 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:26,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:26,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:26,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:26,736 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:17:26,736 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:17:26,736 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:17:26,753 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:17:41,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-08 03:17:41,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:41,172 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-08 03:17:41,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:45,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:45,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:45,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-08 03:17:45,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-08 03:17:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-08 03:17:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 03:17:45,781 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-08 03:17:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:52,688 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-08 03:17:52,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-08 03:17:52,688 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-08 03:17:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:52,689 INFO L225 Difference]: With dead ends: 112 [2019-09-08 03:17:52,689 INFO L226 Difference]: Without dead ends: 109 [2019-09-08 03:17:52,689 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 03:17:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-08 03:17:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-08 03:17:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-08 03:17:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-08 03:17:52,697 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-08 03:17:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:52,698 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-08 03:17:52,698 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-08 03:17:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-08 03:17:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-08 03:17:52,698 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:52,699 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:52,699 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-09-08 03:17:52,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:52,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:52,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:52,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:52,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:52,706 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:17:52,706 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:17:52,706 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:17:52,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:17:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:17:53,174 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-08 03:17:53,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:57,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:57,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:57,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-08 03:17:57,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-08 03:17:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-08 03:17:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 03:17:57,919 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-08 03:18:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:05,108 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-08 03:18:05,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-08 03:18:05,108 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-08 03:18:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:05,109 INFO L225 Difference]: With dead ends: 113 [2019-09-08 03:18:05,109 INFO L226 Difference]: Without dead ends: 110 [2019-09-08 03:18:05,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 03:18:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-08 03:18:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-08 03:18:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-08 03:18:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-08 03:18:05,118 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-08 03:18:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:05,118 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-08 03:18:05,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-08 03:18:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-08 03:18:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 03:18:05,119 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:05,119 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:05,119 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:05,119 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-09-08 03:18:05,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:05,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:05,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:05,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:05,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:05,128 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:05,128 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:05,128 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:18:05,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:05,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:18:05,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:05,646 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-08 03:18:05,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:10,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:10,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:10,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-08 03:18:10,516 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-08 03:18:10,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-08 03:18:10,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 03:18:10,517 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-08 03:18:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:17,875 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-08 03:18:17,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-08 03:18:17,875 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-08 03:18:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:17,876 INFO L225 Difference]: With dead ends: 114 [2019-09-08 03:18:17,876 INFO L226 Difference]: Without dead ends: 111 [2019-09-08 03:18:17,877 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 03:18:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-08 03:18:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-08 03:18:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-08 03:18:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-08 03:18:17,886 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-08 03:18:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:17,886 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-08 03:18:17,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-08 03:18:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-08 03:18:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-08 03:18:17,886 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:17,887 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:17,887 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-09-08 03:18:17,887 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:17,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:17,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:17,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:17,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:17,896 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:17,896 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:17,896 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:18:17,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true