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/array-industry-pattern/array_of_struct_ptr_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:49:43,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:49:43,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:49:43,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 10:49:43,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:49:43,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:49:43,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:49:43,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:49:43,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:49:43,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:49:43,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:49:43,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:49:43,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:49:43,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:49:43,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:49:43,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:49:43,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:49:43,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:49:43,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:49:43,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:49:43,496 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 [2019-09-07 10:49:43,511 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:49:43,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:49:43,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:49:43,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:49:43,515 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:49:43,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:49:43,515 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:49:43,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:49:43,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:49:43,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:49:43,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:49:43,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:49:43,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:49:43,517 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:49:43,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:49:43,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:49:43,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:49:43,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:49:43,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:49:43,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:49:43,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:49:43,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:49:43,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:49:43,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:49:43,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:49:43,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:49:43,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:49:43,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:49:43,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:49:43,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:49:43,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:49:43,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:49:43,580 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:49:43,580 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:49:43,581 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_mul_init.i [2019-09-07 10:49:43,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf2326d1/dff6ac5c85aa47fcbc380d5e3269444b/FLAGbfee4ce19 [2019-09-07 10:49:44,029 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:49:44,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_mul_init.i [2019-09-07 10:49:44,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf2326d1/dff6ac5c85aa47fcbc380d5e3269444b/FLAGbfee4ce19 [2019-09-07 10:49:44,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdf2326d1/dff6ac5c85aa47fcbc380d5e3269444b [2019-09-07 10:49:44,423 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:49:44,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:49:44,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:49:44,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:49:44,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:49:44,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:49:44" (1/1) ... [2019-09-07 10:49:44,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e5ebd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:44, skipping insertion in model container [2019-09-07 10:49:44,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:49:44" (1/1) ... [2019-09-07 10:49:44,445 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:49:44,462 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:49:44,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:49:46,922 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:49:46,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:49:46,981 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:49:46,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46 WrapperNode [2019-09-07 10:49:46,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:49:46,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:49:46,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:49:46,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:49:46,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (1/1) ... [2019-09-07 10:49:46,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (1/1) ... [2019-09-07 10:49:47,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (1/1) ... [2019-09-07 10:49:47,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (1/1) ... [2019-09-07 10:49:47,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (1/1) ... [2019-09-07 10:49:47,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (1/1) ... [2019-09-07 10:49:47,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (1/1) ... [2019-09-07 10:49:47,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:49:47,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:49:47,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:49:47,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:49:47,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (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 [2019-09-07 10:49:47,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:49:47,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:49:47,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:49:47,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:49:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:49:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:49:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-09-07 10:49:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-09-07 10:49:47,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:49:47,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:49:47,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:49:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:49:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:49:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:49:47,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:49:47,562 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:49:47,563 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 10:49:47,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:49:47 BoogieIcfgContainer [2019-09-07 10:49:47,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:49:47,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:49:47,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:49:47,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:49:47,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:49:44" (1/3) ... [2019-09-07 10:49:47,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f416ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:49:47, skipping insertion in model container [2019-09-07 10:49:47,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:49:46" (2/3) ... [2019-09-07 10:49:47,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f416ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:49:47, skipping insertion in model container [2019-09-07 10:49:47,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:49:47" (3/3) ... [2019-09-07 10:49:47,573 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_mul_init.i [2019-09-07 10:49:47,583 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:49:47,591 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:49:47,607 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:49:47,632 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:49:47,633 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:49:47,633 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:49:47,633 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:49:47,633 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:49:47,633 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:49:47,633 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:49:47,633 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:49:47,633 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:49:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-07 10:49:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 10:49:47,656 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:47,657 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:47,659 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:47,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1583089931, now seen corresponding path program 1 times [2019-09-07 10:49:47,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:47,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:47,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:47,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:47,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:49:47,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:49:47,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 10:49:47,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 10:49:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 10:49:47,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:49:47,834 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-07 10:49:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:47,857 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-09-07 10:49:47,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 10:49:47,858 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-07 10:49:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:47,869 INFO L225 Difference]: With dead ends: 50 [2019-09-07 10:49:47,869 INFO L226 Difference]: Without dead ends: 24 [2019-09-07 10:49:47,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:49:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-07 10:49:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-07 10:49:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-07 10:49:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-07 10:49:47,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-09-07 10:49:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:47,913 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-07 10:49:47,914 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 10:49:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-07 10:49:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 10:49:47,916 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:47,916 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:47,917 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:47,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1899913894, now seen corresponding path program 1 times [2019-09-07 10:49:47,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:47,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:47,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:47,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:47,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:49:47,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:49:47,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:49:47,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:49:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:49:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:49:47,997 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-07 10:49:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:48,077 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-09-07 10:49:48,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:49:48,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-07 10:49:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:48,083 INFO L225 Difference]: With dead ends: 50 [2019-09-07 10:49:48,083 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 10:49:48,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:49:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 10:49:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2019-09-07 10:49:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 10:49:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 10:49:48,095 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-09-07 10:49:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:48,096 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 10:49:48,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:49:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 10:49:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 10:49:48,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:48,097 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:48,097 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:48,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1536301701, now seen corresponding path program 1 times [2019-09-07 10:49:48,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:48,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:48,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:48,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-07 10:49:48,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:49:48,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-07 10:49:48,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:49:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:49:48,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:49:48,200 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-09-07 10:49:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:48,256 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-07 10:49:48,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:49:48,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-09-07 10:49:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:48,258 INFO L225 Difference]: With dead ends: 34 [2019-09-07 10:49:48,258 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 10:49:48,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:49:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 10:49:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 10:49:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 10:49:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 10:49:48,265 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2019-09-07 10:49:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:48,266 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 10:49:48,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:49:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 10:49:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 10:49:48,267 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:48,267 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:48,267 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1534454659, now seen corresponding path program 1 times [2019-09-07 10:49:48,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:48,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:48,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:48,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,284 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:48,284 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:48,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:48,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:48,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:49:48,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 10:49:48,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:48,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-09-07 10:49:48,393 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 10:49:48,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 10:49:48,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 10:49:48,394 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2019-09-07 10:49:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:48,510 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-09-07 10:49:48,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:49:48,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-09-07 10:49:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:48,514 INFO L225 Difference]: With dead ends: 73 [2019-09-07 10:49:48,514 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 10:49:48,515 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 10:49:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 10:49:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2019-09-07 10:49:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-07 10:49:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-09-07 10:49:48,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2019-09-07 10:49:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:48,525 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-09-07 10:49:48,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 10:49:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-09-07 10:49:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-07 10:49:48,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:48,527 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:48,527 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1606017140, now seen corresponding path program 2 times [2019-09-07 10:49:48,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:48,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:48,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:48,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,543 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:48,544 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:48,544 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 [2019-09-07 10:49:48,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:49:48,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:49:48,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:48,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:49:48,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-07 10:49:48,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:48,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 10:49:48,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:49:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:49:48,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:49:48,663 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2019-09-07 10:49:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:48,777 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2019-09-07 10:49:48,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:49:48,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-09-07 10:49:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:48,780 INFO L225 Difference]: With dead ends: 87 [2019-09-07 10:49:48,780 INFO L226 Difference]: Without dead ends: 62 [2019-09-07 10:49:48,781 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:49:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-07 10:49:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 41. [2019-09-07 10:49:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-07 10:49:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-09-07 10:49:48,790 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2019-09-07 10:49:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:48,790 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-09-07 10:49:48,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:49:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-09-07 10:49:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 10:49:48,792 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:48,792 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:48,792 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1732161177, now seen corresponding path program 3 times [2019-09-07 10:49:48,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:48,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:48,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:48,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:48,829 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:48,829 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:48,829 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:48,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:49:48,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 10:49:48,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:48,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:49:48,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 10:49:48,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:48,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 10:49:48,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:49:48,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:49:48,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:49:48,931 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2019-09-07 10:49:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:49,067 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2019-09-07 10:49:49,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:49:49,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-09-07 10:49:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:49,069 INFO L225 Difference]: With dead ends: 101 [2019-09-07 10:49:49,070 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 10:49:49,070 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:49:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 10:49:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2019-09-07 10:49:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 10:49:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-09-07 10:49:49,081 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 31 [2019-09-07 10:49:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:49,081 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-09-07 10:49:49,081 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:49:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-09-07 10:49:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-07 10:49:49,083 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:49,083 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:49,083 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1392382608, now seen corresponding path program 4 times [2019-09-07 10:49:49,084 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:49,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:49,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:49,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:49,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:49,101 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:49,102 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:49,102 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:49,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:49:49,144 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:49:49,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:49,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:49:49,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-07 10:49:49,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:49,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 10:49:49,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:49:49,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:49:49,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:49:49,196 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2019-09-07 10:49:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:49,351 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2019-09-07 10:49:49,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:49:49,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-09-07 10:49:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:49,356 INFO L225 Difference]: With dead ends: 115 [2019-09-07 10:49:49,358 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 10:49:49,359 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:49:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 10:49:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2019-09-07 10:49:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 10:49:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-09-07 10:49:49,378 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 36 [2019-09-07 10:49:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:49,378 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-09-07 10:49:49,378 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:49:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-09-07 10:49:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-07 10:49:49,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:49,382 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:49,382 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash 267511989, now seen corresponding path program 5 times [2019-09-07 10:49:49,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:49,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:49,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:49,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:49,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:49,424 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:49,424 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:49,424 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) [2019-09-07 10:49:49,443 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:49,584 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 10:49:49,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:49,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:49:49,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 10:49:49,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:49,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-07 10:49:49,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:49:49,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:49:49,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:49:49,656 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 8 states. [2019-09-07 10:49:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:49,827 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2019-09-07 10:49:49,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:49:49,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-09-07 10:49:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:49,829 INFO L225 Difference]: With dead ends: 129 [2019-09-07 10:49:49,829 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 10:49:49,832 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:49:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 10:49:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2019-09-07 10:49:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 10:49:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-09-07 10:49:49,842 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 41 [2019-09-07 10:49:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:49,843 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-09-07 10:49:49,843 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:49:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-09-07 10:49:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 10:49:49,847 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:49,847 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:49,847 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2052078420, now seen corresponding path program 6 times [2019-09-07 10:49:49,848 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:49,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:49,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:49,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:49,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:49,892 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:49,893 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:49,893 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) [2019-09-07 10:49:49,919 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:49,999 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:49:50,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:50,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:49:50,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:49:50,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:50,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 10:49:50,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:49:50,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:49:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:49:50,087 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2019-09-07 10:49:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:50,288 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2019-09-07 10:49:50,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:49:50,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-09-07 10:49:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:50,291 INFO L225 Difference]: With dead ends: 143 [2019-09-07 10:49:50,291 INFO L226 Difference]: Without dead ends: 106 [2019-09-07 10:49:50,294 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:49:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-07 10:49:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2019-09-07 10:49:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-07 10:49:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-09-07 10:49:50,314 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 46 [2019-09-07 10:49:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:50,314 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-09-07 10:49:50,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:49:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-09-07 10:49:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 10:49:50,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:50,322 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:50,322 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash -90078511, now seen corresponding path program 7 times [2019-09-07 10:49:50,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:50,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:50,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:50,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:50,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:50,349 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:50,349 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:50,349 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) [2019-09-07 10:49:50,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:50,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:49:50,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-09-07 10:49:50,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:50,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-07 10:49:50,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:49:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:49:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:49:50,489 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 10 states. [2019-09-07 10:49:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:50,691 INFO L93 Difference]: Finished difference Result 157 states and 204 transitions. [2019-09-07 10:49:50,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:49:50,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-09-07 10:49:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:50,694 INFO L225 Difference]: With dead ends: 157 [2019-09-07 10:49:50,694 INFO L226 Difference]: Without dead ends: 117 [2019-09-07 10:49:50,696 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:49:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-07 10:49:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 66. [2019-09-07 10:49:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 10:49:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-09-07 10:49:50,719 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 51 [2019-09-07 10:49:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:50,720 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-09-07 10:49:50,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:49:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-09-07 10:49:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 10:49:50,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:50,723 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:50,724 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:50,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1181960504, now seen corresponding path program 8 times [2019-09-07 10:49:50,724 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:50,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:50,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:50,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:50,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:50,762 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:50,762 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:50,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:50,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:49:50,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:49:50,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:50,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:49:50,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:49:50,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:50,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-07 10:49:50,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:49:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:49:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:49:50,899 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 11 states. [2019-09-07 10:49:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:51,111 INFO L93 Difference]: Finished difference Result 171 states and 223 transitions. [2019-09-07 10:49:51,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:49:51,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-09-07 10:49:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:51,113 INFO L225 Difference]: With dead ends: 171 [2019-09-07 10:49:51,113 INFO L226 Difference]: Without dead ends: 128 [2019-09-07 10:49:51,114 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:49:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-09-07 10:49:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 71. [2019-09-07 10:49:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 10:49:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2019-09-07 10:49:51,139 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 56 [2019-09-07 10:49:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:51,140 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2019-09-07 10:49:51,140 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:49:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2019-09-07 10:49:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 10:49:51,144 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:51,144 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:51,145 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:51,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:51,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1976253677, now seen corresponding path program 9 times [2019-09-07 10:49:51,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:51,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:51,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:51,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:51,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:51,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:51,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:51,188 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 [2019-09-07 10:49:51,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:49:51,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-07 10:49:51,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:51,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 10:49:51,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 10:49:51,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:51,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-07 10:49:51,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:49:51,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:49:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:49:51,509 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2019-09-07 10:49:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:51,829 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2019-09-07 10:49:51,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 10:49:51,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2019-09-07 10:49:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:51,833 INFO L225 Difference]: With dead ends: 185 [2019-09-07 10:49:51,833 INFO L226 Difference]: Without dead ends: 139 [2019-09-07 10:49:51,835 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:49:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-07 10:49:51,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 76. [2019-09-07 10:49:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 10:49:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2019-09-07 10:49:51,851 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 61 [2019-09-07 10:49:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:51,851 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2019-09-07 10:49:51,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:49:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2019-09-07 10:49:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-07 10:49:51,852 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:51,852 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:51,853 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 254629660, now seen corresponding path program 10 times [2019-09-07 10:49:51,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:51,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:51,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:51,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:51,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:51,891 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:51,891 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:51,892 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:51,914 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:49:51,952 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:49:51,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:51,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:49:51,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-09-07 10:49:52,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:52,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-07 10:49:52,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 10:49:52,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 10:49:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:49:52,086 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 13 states. [2019-09-07 10:49:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:52,304 INFO L93 Difference]: Finished difference Result 199 states and 261 transitions. [2019-09-07 10:49:52,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:49:52,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2019-09-07 10:49:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:52,306 INFO L225 Difference]: With dead ends: 199 [2019-09-07 10:49:52,306 INFO L226 Difference]: Without dead ends: 150 [2019-09-07 10:49:52,307 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:49:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-07 10:49:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 81. [2019-09-07 10:49:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-07 10:49:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2019-09-07 10:49:52,315 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 66 [2019-09-07 10:49:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:52,316 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2019-09-07 10:49:52,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 10:49:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2019-09-07 10:49:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 10:49:52,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:52,317 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:52,317 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1584191241, now seen corresponding path program 11 times [2019-09-07 10:49:52,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:52,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:52,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:52,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:52,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:52,332 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:52,333 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:52,333 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:49:52,351 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:52,507 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 10:49:52,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:52,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:49:52,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-09-07 10:49:52,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:52,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-07 10:49:52,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:49:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:49:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:49:52,660 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 14 states. [2019-09-07 10:49:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:52,905 INFO L93 Difference]: Finished difference Result 213 states and 280 transitions. [2019-09-07 10:49:52,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:49:52,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-09-07 10:49:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:52,909 INFO L225 Difference]: With dead ends: 213 [2019-09-07 10:49:52,909 INFO L226 Difference]: Without dead ends: 161 [2019-09-07 10:49:52,911 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:49:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-09-07 10:49:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 86. [2019-09-07 10:49:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 10:49:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2019-09-07 10:49:52,927 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 71 [2019-09-07 10:49:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:52,927 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2019-09-07 10:49:52,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:49:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2019-09-07 10:49:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 10:49:52,931 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:52,931 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:52,932 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash -171924224, now seen corresponding path program 12 times [2019-09-07 10:49:52,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:52,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:52,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:52,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:52,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:52,956 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:52,956 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:52,957 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 [2019-09-07 10:49:52,977 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:49:53,681 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:49:53,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:53,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:49:53,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-09-07 10:49:53,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:53,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-07 10:49:53,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:49:53,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:49:53,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:49:53,818 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 15 states. [2019-09-07 10:49:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:54,076 INFO L93 Difference]: Finished difference Result 227 states and 299 transitions. [2019-09-07 10:49:54,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:49:54,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-09-07 10:49:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:54,078 INFO L225 Difference]: With dead ends: 227 [2019-09-07 10:49:54,078 INFO L226 Difference]: Without dead ends: 172 [2019-09-07 10:49:54,079 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:49:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-09-07 10:49:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 91. [2019-09-07 10:49:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-07 10:49:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2019-09-07 10:49:54,087 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 76 [2019-09-07 10:49:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:54,087 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2019-09-07 10:49:54,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:49:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2019-09-07 10:49:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 10:49:54,088 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:54,089 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:54,089 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1140584155, now seen corresponding path program 13 times [2019-09-07 10:49:54,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:54,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:54,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:54,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:54,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:54,103 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:54,104 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:54,104 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:54,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:54,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:49:54,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-07 10:49:54,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:54,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-07 10:49:54,434 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:49:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:49:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:49:54,435 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 16 states. [2019-09-07 10:49:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:54,762 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2019-09-07 10:49:54,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:49:54,763 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-09-07 10:49:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:54,765 INFO L225 Difference]: With dead ends: 241 [2019-09-07 10:49:54,765 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 10:49:54,766 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:49:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 10:49:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 96. [2019-09-07 10:49:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 10:49:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2019-09-07 10:49:54,775 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 81 [2019-09-07 10:49:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:54,776 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2019-09-07 10:49:54,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:49:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2019-09-07 10:49:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-07 10:49:54,777 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:54,777 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:54,778 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:54,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:54,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1561365788, now seen corresponding path program 14 times [2019-09-07 10:49:54,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:54,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:54,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:54,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:49:54,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:54,793 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:54,794 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:54,794 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:49:54,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:54,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:49:54,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:54,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:49:54,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-09-07 10:49:55,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:55,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-07 10:49:55,048 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:49:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:49:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:49:55,049 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand 17 states. [2019-09-07 10:49:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:55,367 INFO L93 Difference]: Finished difference Result 255 states and 337 transitions. [2019-09-07 10:49:55,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:49:55,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2019-09-07 10:49:55,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:55,370 INFO L225 Difference]: With dead ends: 255 [2019-09-07 10:49:55,370 INFO L226 Difference]: Without dead ends: 194 [2019-09-07 10:49:55,371 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:49:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-07 10:49:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 101. [2019-09-07 10:49:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 10:49:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2019-09-07 10:49:55,380 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 86 [2019-09-07 10:49:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:55,381 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2019-09-07 10:49:55,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:49:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2019-09-07 10:49:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-07 10:49:55,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:55,382 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:55,383 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1552853825, now seen corresponding path program 15 times [2019-09-07 10:49:55,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:55,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:55,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:55,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:55,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:55,399 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:55,399 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:55,400 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:49:55,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:56,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 10:49:56,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:56,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 10:49:56,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 10:49:56,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:56,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-07 10:49:56,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:49:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:49:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:49:56,383 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 18 states. [2019-09-07 10:49:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:56,737 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2019-09-07 10:49:56,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 10:49:56,738 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-07 10:49:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:56,740 INFO L225 Difference]: With dead ends: 269 [2019-09-07 10:49:56,740 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 10:49:56,741 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:49:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 10:49:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 106. [2019-09-07 10:49:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 10:49:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2019-09-07 10:49:56,751 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 91 [2019-09-07 10:49:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:56,751 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2019-09-07 10:49:56,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:49:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2019-09-07 10:49:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 10:49:56,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:56,753 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:56,753 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1426325304, now seen corresponding path program 16 times [2019-09-07 10:49:56,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:56,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:56,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:56,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:56,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:56,860 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:56,861 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:56,861 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) [2019-09-07 10:49:56,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:56,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:49:56,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:56,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:49:56,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-07 10:49:57,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:57,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-07 10:49:57,162 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 10:49:57,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 10:49:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:49:57,163 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand 19 states. [2019-09-07 10:49:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:57,540 INFO L93 Difference]: Finished difference Result 283 states and 375 transitions. [2019-09-07 10:49:57,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:49:57,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-09-07 10:49:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:57,544 INFO L225 Difference]: With dead ends: 283 [2019-09-07 10:49:57,544 INFO L226 Difference]: Without dead ends: 216 [2019-09-07 10:49:57,545 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:49:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-09-07 10:49:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 111. [2019-09-07 10:49:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-07 10:49:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2019-09-07 10:49:57,553 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 96 [2019-09-07 10:49:57,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:57,553 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2019-09-07 10:49:57,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 10:49:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2019-09-07 10:49:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 10:49:57,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:57,557 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:57,557 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:57,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1888118109, now seen corresponding path program 17 times [2019-09-07 10:49:57,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:57,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:57,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:57,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:57,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:57,573 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:57,573 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:57,573 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) [2019-09-07 10:49:57,604 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:49:59,032 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 10:49:59,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:59,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:49:59,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-09-07 10:49:59,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:49:59,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-07 10:49:59,245 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:49:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:49:59,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:49:59,246 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 20 states. [2019-09-07 10:49:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:59,644 INFO L93 Difference]: Finished difference Result 297 states and 394 transitions. [2019-09-07 10:49:59,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:49:59,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2019-09-07 10:49:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:59,646 INFO L225 Difference]: With dead ends: 297 [2019-09-07 10:49:59,647 INFO L226 Difference]: Without dead ends: 227 [2019-09-07 10:49:59,647 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:49:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-09-07 10:49:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 116. [2019-09-07 10:49:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 10:49:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2019-09-07 10:49:59,659 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 101 [2019-09-07 10:49:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:59,659 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2019-09-07 10:49:59,659 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:49:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2019-09-07 10:49:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-07 10:49:59,660 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:59,661 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:59,661 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:59,661 INFO L82 PathProgramCache]: Analyzing trace with hash -240611668, now seen corresponding path program 18 times [2019-09-07 10:49:59,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:59,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:59,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:59,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:59,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:59,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:49:59,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:49:59,678 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:49:59,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:50:08,101 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 10:50:08,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:08,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 10:50:08,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-09-07 10:50:08,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:50:08,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-07 10:50:08,384 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:50:08,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:50:08,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:50:08,384 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand 21 states. [2019-09-07 10:50:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:08,783 INFO L93 Difference]: Finished difference Result 311 states and 413 transitions. [2019-09-07 10:50:08,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 10:50:08,786 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-09-07 10:50:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:08,789 INFO L225 Difference]: With dead ends: 311 [2019-09-07 10:50:08,789 INFO L226 Difference]: Without dead ends: 238 [2019-09-07 10:50:08,790 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:50:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-09-07 10:50:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2019-09-07 10:50:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 10:50:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2019-09-07 10:50:08,806 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 106 [2019-09-07 10:50:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:08,806 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2019-09-07 10:50:08,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:50:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2019-09-07 10:50:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 10:50:08,809 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:08,809 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:08,810 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:08,811 INFO L82 PathProgramCache]: Analyzing trace with hash 653590393, now seen corresponding path program 19 times [2019-09-07 10:50:08,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:08,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:08,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:08,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:08,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:08,834 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:50:08,835 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:50:08,835 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 [2019-09-07 10:50:08,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:08,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:50:08,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-09-07 10:50:09,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:50:09,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-07 10:50:09,215 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 10:50:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 10:50:09,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:50:09,216 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 22 states. [2019-09-07 10:50:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:09,629 INFO L93 Difference]: Finished difference Result 325 states and 432 transitions. [2019-09-07 10:50:09,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:50:09,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2019-09-07 10:50:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:09,635 INFO L225 Difference]: With dead ends: 325 [2019-09-07 10:50:09,635 INFO L226 Difference]: Without dead ends: 249 [2019-09-07 10:50:09,636 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:50:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-09-07 10:50:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 126. [2019-09-07 10:50:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 10:50:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2019-09-07 10:50:09,646 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 111 [2019-09-07 10:50:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:09,647 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2019-09-07 10:50:09,647 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 10:50:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2019-09-07 10:50:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 10:50:09,648 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:09,648 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:09,648 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 238509200, now seen corresponding path program 20 times [2019-09-07 10:50:09,649 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:09,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:09,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:09,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:09,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:09,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:50:09,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:50:09,679 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) [2019-09-07 10:50:09,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:50:09,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:50:09,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:09,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:50:09,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-09-07 10:50:10,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:50:10,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-07 10:50:10,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:50:10,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:50:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:50:10,006 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand 23 states. [2019-09-07 10:50:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:10,555 INFO L93 Difference]: Finished difference Result 339 states and 451 transitions. [2019-09-07 10:50:10,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:50:10,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2019-09-07 10:50:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:10,558 INFO L225 Difference]: With dead ends: 339 [2019-09-07 10:50:10,558 INFO L226 Difference]: Without dead ends: 260 [2019-09-07 10:50:10,558 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:50:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-07 10:50:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 131. [2019-09-07 10:50:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 10:50:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2019-09-07 10:50:10,574 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 116 [2019-09-07 10:50:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:10,575 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2019-09-07 10:50:10,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:50:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2019-09-07 10:50:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 10:50:10,576 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:10,576 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:10,577 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1229732245, now seen corresponding path program 21 times [2019-09-07 10:50:10,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:10,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:10,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:10,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,599 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:50:10,600 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:50:10,600 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) [2019-09-07 10:50:10,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:50:15,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 10:50:15,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:15,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 10:50:15,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 10:50:15,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:50:15,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-07 10:50:15,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:50:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:50:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:50:15,403 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand 24 states. [2019-09-07 10:50:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:15,911 INFO L93 Difference]: Finished difference Result 353 states and 470 transitions. [2019-09-07 10:50:15,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:50:15,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-09-07 10:50:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:15,914 INFO L225 Difference]: With dead ends: 353 [2019-09-07 10:50:15,914 INFO L226 Difference]: Without dead ends: 271 [2019-09-07 10:50:15,915 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:50:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-09-07 10:50:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 136. [2019-09-07 10:50:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 10:50:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2019-09-07 10:50:15,929 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 121 [2019-09-07 10:50:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:15,929 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2019-09-07 10:50:15,929 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:50:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2019-09-07 10:50:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-07 10:50:15,930 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:15,931 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:15,931 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1351964044, now seen corresponding path program 22 times [2019-09-07 10:50:15,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:15,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:15,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:15,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:15,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:15,952 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:50:15,952 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:50:15,953 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) [2019-09-07 10:50:15,967 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:50:16,014 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:50:16,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:16,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:50:16,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-07 10:50:16,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:50:16,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-07 10:50:16,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:50:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:50:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:50:16,332 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand 25 states. [2019-09-07 10:50:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:16,958 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2019-09-07 10:50:16,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:50:16,958 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-09-07 10:50:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:16,961 INFO L225 Difference]: With dead ends: 367 [2019-09-07 10:50:16,961 INFO L226 Difference]: Without dead ends: 282 [2019-09-07 10:50:16,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:50:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-09-07 10:50:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 141. [2019-09-07 10:50:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-07 10:50:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2019-09-07 10:50:16,976 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 126 [2019-09-07 10:50:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:16,977 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2019-09-07 10:50:16,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:50:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2019-09-07 10:50:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-07 10:50:16,978 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:16,978 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:16,978 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash -678571087, now seen corresponding path program 23 times [2019-09-07 10:50:16,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:16,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:16,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:16,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:16,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:16,996 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:50:16,996 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:50:16,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:50:17,016 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:50:26,650 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-07 10:50:26,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:26,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 10:50:26,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-07 10:50:26,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:50:26,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-07 10:50:26,959 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:50:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:50:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:50:26,960 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand 26 states. [2019-09-07 10:50:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:27,572 INFO L93 Difference]: Finished difference Result 381 states and 508 transitions. [2019-09-07 10:50:27,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 10:50:27,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2019-09-07 10:50:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:27,575 INFO L225 Difference]: With dead ends: 381 [2019-09-07 10:50:27,575 INFO L226 Difference]: Without dead ends: 293 [2019-09-07 10:50:27,576 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:50:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-09-07 10:50:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 146. [2019-09-07 10:50:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-07 10:50:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2019-09-07 10:50:27,589 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 131 [2019-09-07 10:50:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:27,590 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2019-09-07 10:50:27,590 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:50:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2019-09-07 10:50:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-07 10:50:27,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:27,591 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:27,592 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash -8079272, now seen corresponding path program 24 times [2019-09-07 10:50:27,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:27,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:27,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:27,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:27,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:27,607 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:50:27,608 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:50:27,608 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) [2019-09-07 10:50:27,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:50:59,489 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-07 10:50:59,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:59,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 10:50:59,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-09-07 10:50:59,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:50:59,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-07 10:50:59,948 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 10:50:59,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 10:50:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:50:59,950 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand 27 states. [2019-09-07 10:51:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:00,629 INFO L93 Difference]: Finished difference Result 395 states and 527 transitions. [2019-09-07 10:51:00,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 10:51:00,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2019-09-07 10:51:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:00,632 INFO L225 Difference]: With dead ends: 395 [2019-09-07 10:51:00,633 INFO L226 Difference]: Without dead ends: 304 [2019-09-07 10:51:00,633 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:51:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-09-07 10:51:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 151. [2019-09-07 10:51:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 10:51:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2019-09-07 10:51:00,651 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 136 [2019-09-07 10:51:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:00,651 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2019-09-07 10:51:00,652 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 10:51:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2019-09-07 10:51:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-07 10:51:00,653 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:00,653 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:00,653 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:00,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:00,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1539863091, now seen corresponding path program 25 times [2019-09-07 10:51:00,656 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:00,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:00,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:00,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:00,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:00,676 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:51:00,676 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:51:00,676 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) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:51:00,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:51:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:00,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 10:51:00,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-07 10:51:01,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:51:01,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-07 10:51:01,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 10:51:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 10:51:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:51:01,089 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand 28 states. [2019-09-07 10:51:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:01,859 INFO L93 Difference]: Finished difference Result 409 states and 546 transitions. [2019-09-07 10:51:01,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:51:01,860 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2019-09-07 10:51:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:01,862 INFO L225 Difference]: With dead ends: 409 [2019-09-07 10:51:01,862 INFO L226 Difference]: Without dead ends: 315 [2019-09-07 10:51:01,863 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:51:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-09-07 10:51:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 156. [2019-09-07 10:51:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 10:51:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 185 transitions. [2019-09-07 10:51:01,878 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 185 transitions. Word has length 141 [2019-09-07 10:51:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:01,878 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 185 transitions. [2019-09-07 10:51:01,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 10:51:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 185 transitions. [2019-09-07 10:51:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 10:51:01,880 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:01,880 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:01,880 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash 138921532, now seen corresponding path program 26 times [2019-09-07 10:51:01,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:01,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:01,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:01,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:51:01,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:01,896 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:51:01,897 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:51:01,897 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 [2019-09-07 10:51:01,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:51:01,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:51:01,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:01,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:51:01,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-09-07 10:51:02,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:51:02,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-07 10:51:02,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:51:02,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:51:02,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:51:02,299 INFO L87 Difference]: Start difference. First operand 156 states and 185 transitions. Second operand 29 states. [2019-09-07 10:51:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:03,251 INFO L93 Difference]: Finished difference Result 423 states and 565 transitions. [2019-09-07 10:51:03,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 10:51:03,252 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 146 [2019-09-07 10:51:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:03,255 INFO L225 Difference]: With dead ends: 423 [2019-09-07 10:51:03,255 INFO L226 Difference]: Without dead ends: 326 [2019-09-07 10:51:03,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:51:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-09-07 10:51:03,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 161. [2019-09-07 10:51:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 10:51:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2019-09-07 10:51:03,285 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 146 [2019-09-07 10:51:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:03,286 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2019-09-07 10:51:03,286 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:51:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2019-09-07 10:51:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-07 10:51:03,288 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:03,289 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:03,289 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash -263772183, now seen corresponding path program 27 times [2019-09-07 10:51:03,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:03,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:03,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:03,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:03,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:03,321 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:51:03,321 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:51:03,321 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) [2019-09-07 10:51:03,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:51:23,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-07 10:51:23,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:23,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 10:51:23,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2019-09-07 10:51:23,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:51:23,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-07 10:51:23,733 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 10:51:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 10:51:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:51:23,734 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand 30 states. [2019-09-07 10:51:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:24,465 INFO L93 Difference]: Finished difference Result 437 states and 584 transitions. [2019-09-07 10:51:24,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 10:51:24,465 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2019-09-07 10:51:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:24,468 INFO L225 Difference]: With dead ends: 437 [2019-09-07 10:51:24,469 INFO L226 Difference]: Without dead ends: 337 [2019-09-07 10:51:24,470 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:51:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-09-07 10:51:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 166. [2019-09-07 10:51:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-09-07 10:51:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 197 transitions. [2019-09-07 10:51:24,486 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 197 transitions. Word has length 151 [2019-09-07 10:51:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:24,486 INFO L475 AbstractCegarLoop]: Abstraction has 166 states and 197 transitions. [2019-09-07 10:51:24,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 10:51:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 197 transitions. [2019-09-07 10:51:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-07 10:51:24,488 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:24,488 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:24,488 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 385225760, now seen corresponding path program 28 times [2019-09-07 10:51:24,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:24,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:24,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:24,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:24,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:24,505 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:51:24,505 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:51:24,505 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:51:24,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:51:24,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:51:24,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:24,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:51:24,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-09-07 10:51:25,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:51:25,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-07 10:51:25,051 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 10:51:25,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 10:51:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 10:51:25,052 INFO L87 Difference]: Start difference. First operand 166 states and 197 transitions. Second operand 31 states. [2019-09-07 10:51:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:25,789 INFO L93 Difference]: Finished difference Result 451 states and 603 transitions. [2019-09-07 10:51:25,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:51:25,789 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-09-07 10:51:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:25,792 INFO L225 Difference]: With dead ends: 451 [2019-09-07 10:51:25,792 INFO L226 Difference]: Without dead ends: 348 [2019-09-07 10:51:25,793 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 10:51:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-09-07 10:51:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 171. [2019-09-07 10:51:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-09-07 10:51:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2019-09-07 10:51:25,809 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 156 [2019-09-07 10:51:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:25,810 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2019-09-07 10:51:25,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 10:51:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2019-09-07 10:51:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-07 10:51:25,812 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:25,812 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:25,812 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash 121266693, now seen corresponding path program 29 times [2019-09-07 10:51:25,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:25,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:25,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:25,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:25,829 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:51:25,830 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:51:25,830 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 [2019-09-07 10:51:25,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:51:49,377 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-09-07 10:51:49,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:49,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 10:51:49,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 10:51:49,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:51:49,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-07 10:51:49,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:51:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:51:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:51:49,781 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand 32 states. [2019-09-07 10:51:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:50,666 INFO L93 Difference]: Finished difference Result 465 states and 622 transitions. [2019-09-07 10:51:50,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 10:51:50,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2019-09-07 10:51:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:50,668 INFO L225 Difference]: With dead ends: 465 [2019-09-07 10:51:50,668 INFO L226 Difference]: Without dead ends: 359 [2019-09-07 10:51:50,669 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:51:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-09-07 10:51:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 176. [2019-09-07 10:51:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-09-07 10:51:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 209 transitions. [2019-09-07 10:51:50,689 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 209 transitions. Word has length 161 [2019-09-07 10:51:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:50,689 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 209 transitions. [2019-09-07 10:51:50,689 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:51:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 209 transitions. [2019-09-07 10:51:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-07 10:51:50,690 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:50,691 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:50,691 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:50,691 INFO L82 PathProgramCache]: Analyzing trace with hash 542237188, now seen corresponding path program 30 times [2019-09-07 10:51:50,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:50,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:50,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:50,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:50,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:50,709 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:51:50,709 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:51:50,709 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:51:50,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:53:37,438 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-07 10:53:37,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:53:37,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:53:37,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:53:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 10:53:37,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:53:37,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-07 10:53:37,912 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 10:53:37,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 10:53:37,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 10:53:37,913 INFO L87 Difference]: Start difference. First operand 176 states and 209 transitions. Second operand 33 states. [2019-09-07 10:53:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:53:38,921 INFO L93 Difference]: Finished difference Result 479 states and 641 transitions. [2019-09-07 10:53:38,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 10:53:38,924 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 166 [2019-09-07 10:53:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:53:38,927 INFO L225 Difference]: With dead ends: 479 [2019-09-07 10:53:38,927 INFO L226 Difference]: Without dead ends: 370 [2019-09-07 10:53:38,929 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 10:53:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-09-07 10:53:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 181. [2019-09-07 10:53:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-07 10:53:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2019-09-07 10:53:38,950 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 166 [2019-09-07 10:53:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:53:38,950 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2019-09-07 10:53:38,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 10:53:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2019-09-07 10:53:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-09-07 10:53:38,951 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:53:38,951 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:53:38,952 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:53:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:53:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash -619774943, now seen corresponding path program 31 times [2019-09-07 10:53:38,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:53:38,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:53:38,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:38,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:53:38,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:38,969 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:53:38,970 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:53:38,970 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 [2019-09-07 10:53:38,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:53:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:53:39,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 10:53:39,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:53:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2019-09-07 10:53:39,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:53:39,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-07 10:53:39,484 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 10:53:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 10:53:39,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:53:39,485 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand 34 states. [2019-09-07 10:53:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:53:40,536 INFO L93 Difference]: Finished difference Result 493 states and 660 transitions. [2019-09-07 10:53:40,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 10:53:40,536 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 171 [2019-09-07 10:53:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:53:40,538 INFO L225 Difference]: With dead ends: 493 [2019-09-07 10:53:40,538 INFO L226 Difference]: Without dead ends: 381 [2019-09-07 10:53:40,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:53:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-09-07 10:53:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 186. [2019-09-07 10:53:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-09-07 10:53:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 221 transitions. [2019-09-07 10:53:40,558 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 221 transitions. Word has length 171 [2019-09-07 10:53:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:53:40,559 INFO L475 AbstractCegarLoop]: Abstraction has 186 states and 221 transitions. [2019-09-07 10:53:40,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 10:53:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 221 transitions. [2019-09-07 10:53:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-07 10:53:40,560 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:53:40,560 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:53:40,560 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:53:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:53:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash 614297576, now seen corresponding path program 32 times [2019-09-07 10:53:40,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:53:40,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:53:40,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:40,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:53:40,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:40,579 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:53:40,579 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:53:40,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 10:53:40,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:53:40,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:53:40,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:53:40,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 10:53:40,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:53:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-09-07 10:53:41,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:53:41,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-07 10:53:41,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 10:53:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 10:53:41,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 10:53:41,121 INFO L87 Difference]: Start difference. First operand 186 states and 221 transitions. Second operand 35 states. [2019-09-07 10:53:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:53:42,348 INFO L93 Difference]: Finished difference Result 507 states and 679 transitions. [2019-09-07 10:53:42,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 10:53:42,349 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2019-09-07 10:53:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:53:42,351 INFO L225 Difference]: With dead ends: 507 [2019-09-07 10:53:42,352 INFO L226 Difference]: Without dead ends: 392 [2019-09-07 10:53:42,353 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 10:53:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-09-07 10:53:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 191. [2019-09-07 10:53:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-09-07 10:53:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 227 transitions. [2019-09-07 10:53:42,400 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 227 transitions. Word has length 176 [2019-09-07 10:53:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:53:42,400 INFO L475 AbstractCegarLoop]: Abstraction has 191 states and 227 transitions. [2019-09-07 10:53:42,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 10:53:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 227 transitions. [2019-09-07 10:53:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-07 10:53:42,402 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:53:42,403 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:53:42,403 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:53:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:53:42,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1606240707, now seen corresponding path program 33 times [2019-09-07 10:53:42,403 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:53:42,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:53:42,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:42,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:53:42,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:42,425 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:53:42,426 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:53:42,426 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) [2019-09-07 10:53:42,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:55:19,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-09-07 10:55:19,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:55:19,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 10:55:19,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:55:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2019-09-07 10:55:19,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:55:19,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-07 10:55:19,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 10:55:19,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 10:55:19,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 10:55:19,982 INFO L87 Difference]: Start difference. First operand 191 states and 227 transitions. Second operand 36 states. [2019-09-07 10:55:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:55:21,061 INFO L93 Difference]: Finished difference Result 521 states and 698 transitions. [2019-09-07 10:55:21,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 10:55:21,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 181 [2019-09-07 10:55:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:55:21,063 INFO L225 Difference]: With dead ends: 521 [2019-09-07 10:55:21,063 INFO L226 Difference]: Without dead ends: 403 [2019-09-07 10:55:21,064 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 10:55:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-09-07 10:55:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 196. [2019-09-07 10:55:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 10:55:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2019-09-07 10:55:21,087 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 181 [2019-09-07 10:55:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:55:21,088 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2019-09-07 10:55:21,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 10:55:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2019-09-07 10:55:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 10:55:21,089 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:55:21,089 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:55:21,089 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:55:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:55:21,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1818559028, now seen corresponding path program 34 times [2019-09-07 10:55:21,090 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:55:21,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:55:21,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:21,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:55:21,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:21,107 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:55:21,107 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:55:21,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:55:21,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:55:21,190 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:55:21,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:55:21,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 10:55:21,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:55:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-09-07 10:55:21,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:55:21,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-07 10:55:21,679 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 10:55:21,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 10:55:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 10:55:21,680 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 37 states. [2019-09-07 10:55:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:55:22,802 INFO L93 Difference]: Finished difference Result 535 states and 717 transitions. [2019-09-07 10:55:22,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 10:55:22,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 186 [2019-09-07 10:55:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:55:22,805 INFO L225 Difference]: With dead ends: 535 [2019-09-07 10:55:22,805 INFO L226 Difference]: Without dead ends: 414 [2019-09-07 10:55:22,806 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 10:55:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2019-09-07 10:55:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 201. [2019-09-07 10:55:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-09-07 10:55:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 239 transitions. [2019-09-07 10:55:22,831 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 239 transitions. Word has length 186 [2019-09-07 10:55:22,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:55:22,831 INFO L475 AbstractCegarLoop]: Abstraction has 201 states and 239 transitions. [2019-09-07 10:55:22,831 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 10:55:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 239 transitions. [2019-09-07 10:55:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-07 10:55:22,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:55:22,833 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:55:22,833 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:55:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:55:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1775456345, now seen corresponding path program 35 times [2019-09-07 10:55:22,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:55:22,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:55:22,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:22,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:55:22,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:22,851 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:55:22,851 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:55:22,851 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) [2019-09-07 10:55:22,875 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 10:56:33,221 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-09-07 10:56:33,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:56:33,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 10:56:33,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-09-07 10:56:33,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 10:56:33,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-07 10:56:33,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 10:56:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 10:56:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 10:56:33,765 INFO L87 Difference]: Start difference. First operand 201 states and 239 transitions. Second operand 38 states. [2019-09-07 10:56:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:34,939 INFO L93 Difference]: Finished difference Result 549 states and 736 transitions. [2019-09-07 10:56:34,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 10:56:34,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 191 [2019-09-07 10:56:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:34,942 INFO L225 Difference]: With dead ends: 549 [2019-09-07 10:56:34,942 INFO L226 Difference]: Without dead ends: 425 [2019-09-07 10:56:34,944 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 10:56:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-07 10:56:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 206. [2019-09-07 10:56:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-09-07 10:56:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 245 transitions. [2019-09-07 10:56:34,973 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 245 transitions. Word has length 191 [2019-09-07 10:56:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:34,973 INFO L475 AbstractCegarLoop]: Abstraction has 206 states and 245 transitions. [2019-09-07 10:56:34,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 10:56:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 245 transitions. [2019-09-07 10:56:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-07 10:56:34,975 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:34,975 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:34,975 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:34,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1332950096, now seen corresponding path program 36 times [2019-09-07 10:56:34,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:34,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:34,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:34,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:56:34,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:34,994 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 10:56:34,995 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 10:56:34,995 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 10:56:35,023 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true