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_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:48:31,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:48:31,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:48:31,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 10:48:31,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 10:48:31,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 10:48:31,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 10:48:31,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 10:48:31,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 10:48:31,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 10:48:31,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 10:48:31,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 10:48:31,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:48:31,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:48:31,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:48:31,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:48:31,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:48:31,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:48:31,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:48:31,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:48:31,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:48:31,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:48:31,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:48:31,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:48:31,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:48:31,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 10:48:31,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 10:48:31,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 10:48:31,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 10:48:31,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 10:48:31,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 10:48:31,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 10:48:31,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 10:48:31,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:48:31,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:48:31,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:48:31,316 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 10:48:31,349 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:48:31,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:48:31,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:48:31,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:48:31,351 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:48:31,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:48:31,351 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:48:31,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:48:31,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:48:31,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:48:31,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:48:31,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:48:31,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:48:31,352 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:48:31,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:48:31,353 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:48:31,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:48:31,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:48:31,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:48:31,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:48:31,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:48:31,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:48:31,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:48:31,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:48:31,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:48:31,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:48:31,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:48:31,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:48:31,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:48:31,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:48:31,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:48:31,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:48:31,403 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:48:31,403 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:48:31,404 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2019-09-07 10:48:31,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90003e6f9/9d48018931c64149b656f1e4ba071fae/FLAGf3ebff5ff [2019-09-07 10:48:31,932 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:48:31,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2019-09-07 10:48:31,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90003e6f9/9d48018931c64149b656f1e4ba071fae/FLAGf3ebff5ff [2019-09-07 10:48:32,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90003e6f9/9d48018931c64149b656f1e4ba071fae [2019-09-07 10:48:32,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:48:32,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:48:32,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:48:32,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:48:32,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:48:32,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b60730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32, skipping insertion in model container [2019-09-07 10:48:32,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,334 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:48:32,355 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:48:32,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:48:32,565 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:48:32,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:48:32,706 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:48:32,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32 WrapperNode [2019-09-07 10:48:32,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:48:32,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:48:32,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:48:32,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:48:32,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... [2019-09-07 10:48:32,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:48:32,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:48:32,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:48:32,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:48:32,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:48:32,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:48:32,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:48:32,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:48:32,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:48:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-07 10:48:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:48:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 10:48:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:48:32,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:48:32,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-07 10:48:32,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:48:32,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:48:32,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-07 10:48:32,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-07 10:48:32,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:48:32,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:48:32,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:48:32,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:48:33,133 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:48:33,133 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-07 10:48:33,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:48:33 BoogieIcfgContainer [2019-09-07 10:48:33,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:48:33,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:48:33,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:48:33,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:48:33,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:48:32" (1/3) ... [2019-09-07 10:48:33,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ed82bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:48:33, skipping insertion in model container [2019-09-07 10:48:33,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:48:32" (2/3) ... [2019-09-07 10:48:33,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ed82bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:48:33, skipping insertion in model container [2019-09-07 10:48:33,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:48:33" (3/3) ... [2019-09-07 10:48:33,143 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2019-09-07 10:48:33,153 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:48:33,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:48:33,179 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:48:33,209 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:48:33,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:48:33,210 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:48:33,210 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:48:33,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:48:33,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:48:33,211 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:48:33,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:48:33,211 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:48:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-07 10:48:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-07 10:48:33,237 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:33,238 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:33,240 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:33,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:33,247 INFO L82 PathProgramCache]: Analyzing trace with hash -72789506, now seen corresponding path program 1 times [2019-09-07 10:48:33,249 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:33,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:33,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:33,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:33,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:33,393 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 10:48:33,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:48:33,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 10:48:33,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 10:48:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 10:48:33,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:48:33,419 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-07 10:48:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:33,446 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2019-09-07 10:48:33,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 10:48:33,448 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-07 10:48:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:33,457 INFO L225 Difference]: With dead ends: 42 [2019-09-07 10:48:33,457 INFO L226 Difference]: Without dead ends: 22 [2019-09-07 10:48:33,461 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 10:48:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-07 10:48:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-07 10:48:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-07 10:48:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-09-07 10:48:33,513 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-09-07 10:48:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:33,515 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-09-07 10:48:33,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 10:48:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-09-07 10:48:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-07 10:48:33,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:33,519 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:33,519 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:33,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1254487381, now seen corresponding path program 1 times [2019-09-07 10:48:33,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:33,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:33,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:33,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:33,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:33,657 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 10:48:33,657 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:48:33,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:48:33,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:48:33,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:48:33,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:48:33,662 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2019-09-07 10:48:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:33,743 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-09-07 10:48:33,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:48:33,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-07 10:48:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:33,747 INFO L225 Difference]: With dead ends: 43 [2019-09-07 10:48:33,747 INFO L226 Difference]: Without dead ends: 31 [2019-09-07 10:48:33,750 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 10:48:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-07 10:48:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-09-07 10:48:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-07 10:48:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-09-07 10:48:33,774 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2019-09-07 10:48:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:33,775 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-09-07 10:48:33,775 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:48:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-09-07 10:48:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-07 10:48:33,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:33,777 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:33,777 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:33,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash 343855824, now seen corresponding path program 1 times [2019-09-07 10:48:33,779 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:33,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:33,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:33,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:33,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:33,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:33,917 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:33,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:33,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:48:33,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:48:34,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:34,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 10:48:34,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:48:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:48:34,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:48:34,041 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2019-09-07 10:48:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:34,134 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-09-07 10:48:34,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:48:34,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-09-07 10:48:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:34,137 INFO L225 Difference]: With dead ends: 52 [2019-09-07 10:48:34,137 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 10:48:34,138 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 10:48:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 10:48:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2019-09-07 10:48:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 10:48:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 10:48:34,144 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2019-09-07 10:48:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:34,144 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 10:48:34,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:48:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 10:48:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-07 10:48:34,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:34,146 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:34,146 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash 908656757, now seen corresponding path program 2 times [2019-09-07 10:48:34,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:34,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:34,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:34,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:34,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:34,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:34,279 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:48:34,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:34,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:48:34,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:34,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:48:34,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:34,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:34,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 10:48:34,400 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:48:34,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:48:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:48:34,401 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2019-09-07 10:48:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:34,488 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2019-09-07 10:48:34,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:48:34,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-09-07 10:48:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:34,490 INFO L225 Difference]: With dead ends: 61 [2019-09-07 10:48:34,490 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 10:48:34,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:48:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 10:48:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2019-09-07 10:48:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 10:48:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-09-07 10:48:34,499 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2019-09-07 10:48:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:34,500 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-09-07 10:48:34,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:48:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-09-07 10:48:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-07 10:48:34,501 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:34,501 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:34,502 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:34,502 INFO L82 PathProgramCache]: Analyzing trace with hash -167128166, now seen corresponding path program 3 times [2019-09-07 10:48:34,502 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:34,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:34,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:34,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:34,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:34,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:34,656 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:48:34,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:34,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 10:48:34,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:34,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:48:34,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:34,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:34,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 10:48:34,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:48:34,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:48:34,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:48:34,773 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2019-09-07 10:48:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:34,872 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2019-09-07 10:48:34,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:48:34,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-09-07 10:48:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:34,874 INFO L225 Difference]: With dead ends: 70 [2019-09-07 10:48:34,874 INFO L226 Difference]: Without dead ends: 58 [2019-09-07 10:48:34,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:48:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-07 10:48:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2019-09-07 10:48:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-07 10:48:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-09-07 10:48:34,889 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2019-09-07 10:48:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:34,890 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-09-07 10:48:34,891 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:48:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-09-07 10:48:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-07 10:48:34,893 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:34,893 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:34,894 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:34,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1699908671, now seen corresponding path program 4 times [2019-09-07 10:48:34,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:34,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:34,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:34,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:34,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:35,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:35,062 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:35,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:48:35,327 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:48:35,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:35,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:48:35,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:35,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:35,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 10:48:35,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:48:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:48:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:48:35,364 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2019-09-07 10:48:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:35,480 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-09-07 10:48:35,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:48:35,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-09-07 10:48:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:35,482 INFO L225 Difference]: With dead ends: 79 [2019-09-07 10:48:35,482 INFO L226 Difference]: Without dead ends: 67 [2019-09-07 10:48:35,483 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:48:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-07 10:48:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2019-09-07 10:48:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 10:48:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-09-07 10:48:35,490 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 30 [2019-09-07 10:48:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:35,491 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-09-07 10:48:35,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:48:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-09-07 10:48:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 10:48:35,492 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:35,492 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:35,493 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash 445934180, now seen corresponding path program 5 times [2019-09-07 10:48:35,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:35,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:35,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:35,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:35,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:35,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:48:35,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:37,197 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 10:48:37,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:37,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:48:37,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:37,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:37,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 10:48:37,239 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:48:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:48:37,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:48:37,240 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 9 states. [2019-09-07 10:48:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:37,381 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2019-09-07 10:48:37,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:48:37,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-09-07 10:48:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:37,383 INFO L225 Difference]: With dead ends: 88 [2019-09-07 10:48:37,383 INFO L226 Difference]: Without dead ends: 76 [2019-09-07 10:48:37,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:48:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-07 10:48:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2019-09-07 10:48:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 10:48:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2019-09-07 10:48:37,392 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 34 [2019-09-07 10:48:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:37,393 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2019-09-07 10:48:37,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:48:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2019-09-07 10:48:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-07 10:48:37,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:37,395 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:37,395 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2118078967, now seen corresponding path program 6 times [2019-09-07 10:48:37,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:37,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:37,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:37,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:37,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:37,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:37,546 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:48:37,568 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:41,920 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:48:41,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:41,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:48:41,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:41,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:41,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 10:48:41,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:48:41,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:48:41,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:48:41,957 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 10 states. [2019-09-07 10:48:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:42,085 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2019-09-07 10:48:42,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:48:42,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-09-07 10:48:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:42,087 INFO L225 Difference]: With dead ends: 97 [2019-09-07 10:48:42,087 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 10:48:42,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:48:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 10:48:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2019-09-07 10:48:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 10:48:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-09-07 10:48:42,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2019-09-07 10:48:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:42,096 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-09-07 10:48:42,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:48:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-09-07 10:48:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 10:48:42,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:42,097 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:42,098 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash 740857646, now seen corresponding path program 7 times [2019-09-07 10:48:42,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:42,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:42,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:42,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:42,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:42,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:42,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:42,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:42,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:48:42,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:42,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:42,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 10:48:42,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:48:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:48:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:48:42,375 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 11 states. [2019-09-07 10:48:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:42,555 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2019-09-07 10:48:42,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:48:42,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-09-07 10:48:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:42,557 INFO L225 Difference]: With dead ends: 106 [2019-09-07 10:48:42,558 INFO L226 Difference]: Without dead ends: 94 [2019-09-07 10:48:42,562 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:48:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-07 10:48:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2019-09-07 10:48:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 10:48:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-09-07 10:48:42,577 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 42 [2019-09-07 10:48:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:42,578 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-09-07 10:48:42,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:48:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-09-07 10:48:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 10:48:42,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:42,580 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:42,580 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash 545088979, now seen corresponding path program 8 times [2019-09-07 10:48:42,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:42,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:42,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:48:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:42,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:42,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:48:42,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:48:42,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:48:42,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:48:42,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:48:42,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:48:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:42,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:48:42,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 10:48:42,903 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:48:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:48:42,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:48:42,904 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 12 states. [2019-09-07 10:48:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:48:43,064 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2019-09-07 10:48:43,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:48:43,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-09-07 10:48:43,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:48:43,066 INFO L225 Difference]: With dead ends: 115 [2019-09-07 10:48:43,066 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 10:48:43,067 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:48:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 10:48:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2019-09-07 10:48:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 10:48:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2019-09-07 10:48:43,073 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 46 [2019-09-07 10:48:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:48:43,074 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2019-09-07 10:48:43,074 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:48:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2019-09-07 10:48:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-07 10:48:43,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:48:43,075 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:48:43,075 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:48:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:48:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash 718297592, now seen corresponding path program 9 times [2019-09-07 10:48:43,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:48:43,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:48:43,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:43,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:48:43,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:48:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:48:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:48:43,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:48:43,216 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:48:43,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:49:29,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-07 10:49:29,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:29,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 10:49:29,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:49:29,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:49:29,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 10:49:29,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 10:49:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 10:49:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:49:29,874 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 13 states. [2019-09-07 10:49:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:30,021 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2019-09-07 10:49:30,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 10:49:30,021 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-09-07 10:49:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:30,023 INFO L225 Difference]: With dead ends: 124 [2019-09-07 10:49:30,023 INFO L226 Difference]: Without dead ends: 112 [2019-09-07 10:49:30,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:49:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-07 10:49:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2019-09-07 10:49:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 10:49:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2019-09-07 10:49:30,031 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 50 [2019-09-07 10:49:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:30,031 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2019-09-07 10:49:30,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 10:49:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2019-09-07 10:49:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 10:49:30,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:30,034 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:30,034 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash 747811741, now seen corresponding path program 10 times [2019-09-07 10:49:30,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:30,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:30,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:30,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:30,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:49:30,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:49:30,223 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:49:30,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:49:42,334 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:49:42,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:49:42,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:49:42,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:49:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:49:42,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:49:42,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 10:49:42,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:49:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:49:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:49:42,373 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 14 states. [2019-09-07 10:49:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:49:42,539 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2019-09-07 10:49:42,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:49:42,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-09-07 10:49:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:49:42,540 INFO L225 Difference]: With dead ends: 133 [2019-09-07 10:49:42,541 INFO L226 Difference]: Without dead ends: 121 [2019-09-07 10:49:42,541 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:49:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-07 10:49:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2019-09-07 10:49:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 10:49:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2019-09-07 10:49:42,555 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 54 [2019-09-07 10:49:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:49:42,555 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2019-09-07 10:49:42,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:49:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2019-09-07 10:49:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-07 10:49:42,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:49:42,561 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:49:42,561 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:49:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:49:42,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1821749954, now seen corresponding path program 11 times [2019-09-07 10:49:42,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:49:42,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:49:42,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:42,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:49:42,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:49:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:49:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:49:42,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:49:42,779 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:49:42,795 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:50:19,905 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 10:50:19,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:19,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:50:19,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:19,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:19,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 10:50:19,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:50:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:50:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:50:19,963 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 15 states. [2019-09-07 10:50:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:20,136 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2019-09-07 10:50:20,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:50:20,137 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-09-07 10:50:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:20,138 INFO L225 Difference]: With dead ends: 142 [2019-09-07 10:50:20,138 INFO L226 Difference]: Without dead ends: 130 [2019-09-07 10:50:20,140 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:50:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-07 10:50:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 67. [2019-09-07 10:50:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 10:50:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2019-09-07 10:50:20,148 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 58 [2019-09-07 10:50:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:20,148 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2019-09-07 10:50:20,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:50:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2019-09-07 10:50:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-07 10:50:20,149 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:20,149 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:20,150 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash -418736281, now seen corresponding path program 12 times [2019-09-07 10:50:20,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:20,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:20,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:20,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:20,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:20,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:20,372 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:20,388 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:51:34,581 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:51:34,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:34,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:51:34,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:34,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:51:34,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 10:51:34,670 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:51:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:51:34,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:51:34,672 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 16 states. [2019-09-07 10:51:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:34,921 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2019-09-07 10:51:34,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:51:34,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-09-07 10:51:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:34,925 INFO L225 Difference]: With dead ends: 151 [2019-09-07 10:51:34,925 INFO L226 Difference]: Without dead ends: 139 [2019-09-07 10:51:34,926 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:51:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-07 10:51:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 71. [2019-09-07 10:51:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 10:51:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2019-09-07 10:51:34,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 62 [2019-09-07 10:51:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:34,938 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2019-09-07 10:51:34,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:51:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2019-09-07 10:51:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-07 10:51:34,940 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:34,940 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:34,940 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1652383348, now seen corresponding path program 13 times [2019-09-07 10:51:34,941 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:34,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:34,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:34,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:34,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:35,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:51:35,177 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:51:35,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:35,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:51:35,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:51:35,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:51:35,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 10:51:35,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:51:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:51:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:51:35,375 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 17 states. [2019-09-07 10:51:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:35,613 INFO L93 Difference]: Finished difference Result 160 states and 207 transitions. [2019-09-07 10:51:35,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:51:35,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-09-07 10:51:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:35,616 INFO L225 Difference]: With dead ends: 160 [2019-09-07 10:51:35,616 INFO L226 Difference]: Without dead ends: 148 [2019-09-07 10:51:35,617 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:51:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-09-07 10:51:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 75. [2019-09-07 10:51:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 10:51:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2019-09-07 10:51:35,637 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 66 [2019-09-07 10:51:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:35,637 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2019-09-07 10:51:35,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:51:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2019-09-07 10:51:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-07 10:51:35,639 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:35,639 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:35,640 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:35,640 INFO L82 PathProgramCache]: Analyzing trace with hash -420540111, now seen corresponding path program 14 times [2019-09-07 10:51:35,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:35,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:35,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:35,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:51:35,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:35,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:51:35,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:35,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:51:36,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:51:36,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:36,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:51:36,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:51:36,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:51:36,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 10:51:36,082 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:51:36,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:51:36,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:51:36,084 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 18 states. [2019-09-07 10:51:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:36,392 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2019-09-07 10:51:36,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:51:36,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-09-07 10:51:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:36,395 INFO L225 Difference]: With dead ends: 169 [2019-09-07 10:51:36,396 INFO L226 Difference]: Without dead ends: 157 [2019-09-07 10:51:36,398 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:51:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-07 10:51:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 79. [2019-09-07 10:51:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 10:51:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2019-09-07 10:51:36,407 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 70 [2019-09-07 10:51:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:36,408 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2019-09-07 10:51:36,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:51:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2019-09-07 10:51:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-07 10:51:36,412 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:36,412 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:36,413 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:36,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1079957930, now seen corresponding path program 15 times [2019-09-07 10:51:36,413 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:36,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:36,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:36,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:36,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:36,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:51:36,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:36,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:53:30,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 10:53:30,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:53:30,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 10:53:30,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:53:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:53:30,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:53:30,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 10:53:30,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 10:53:30,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 10:53:30,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:53:30,564 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 19 states. [2019-09-07 10:53:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:53:30,749 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2019-09-07 10:53:30,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 10:53:30,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-09-07 10:53:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:53:30,751 INFO L225 Difference]: With dead ends: 178 [2019-09-07 10:53:30,751 INFO L226 Difference]: Without dead ends: 166 [2019-09-07 10:53:30,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:53:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-09-07 10:53:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 83. [2019-09-07 10:53:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 10:53:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2019-09-07 10:53:30,758 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 74 [2019-09-07 10:53:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:53:30,758 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2019-09-07 10:53:30,758 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 10:53:30,758 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2019-09-07 10:53:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-07 10:53:30,759 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:53:30,759 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:53:30,759 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:53:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:53:30,760 INFO L82 PathProgramCache]: Analyzing trace with hash 424288507, now seen corresponding path program 16 times [2019-09-07 10:53:30,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:53:30,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:53:30,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:30,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:53:30,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:53:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:53:31,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:53:31,038 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:53:31,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:53:43,184 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:53:43,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:53:43,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:53:43,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:53:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:53:43,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:53:43,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 10:53:43,240 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:53:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:53:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:53:43,241 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 20 states. [2019-09-07 10:53:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:53:43,516 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2019-09-07 10:53:43,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:53:43,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-09-07 10:53:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:53:43,518 INFO L225 Difference]: With dead ends: 187 [2019-09-07 10:53:43,518 INFO L226 Difference]: Without dead ends: 175 [2019-09-07 10:53:43,519 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:53:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-09-07 10:53:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 87. [2019-09-07 10:53:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-07 10:53:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2019-09-07 10:53:43,524 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 78 [2019-09-07 10:53:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:53:43,525 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2019-09-07 10:53:43,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:53:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2019-09-07 10:53:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-07 10:53:43,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:53:43,526 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:53:43,526 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:53:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:53:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash 721109280, now seen corresponding path program 17 times [2019-09-07 10:53:43,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:53:43,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:53:43,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:43,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:53:43,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:53:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:53:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:53:43,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:53:43,767 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:53:43,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:56:21,323 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 10:56:21,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:56:21,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:56:21,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:21,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:56:21,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 10:56:21,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:56:21,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:56:21,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:56:21,427 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 21 states. [2019-09-07 10:56:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:21,782 INFO L93 Difference]: Finished difference Result 196 states and 255 transitions. [2019-09-07 10:56:21,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:56:21,782 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-09-07 10:56:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:21,784 INFO L225 Difference]: With dead ends: 196 [2019-09-07 10:56:21,784 INFO L226 Difference]: Without dead ends: 184 [2019-09-07 10:56:21,785 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:56:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-09-07 10:56:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 91. [2019-09-07 10:56:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-07 10:56:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2019-09-07 10:56:21,790 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 82 [2019-09-07 10:56:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:21,791 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2019-09-07 10:56:21,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:56:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2019-09-07 10:56:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-07 10:56:21,792 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:21,792 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:21,792 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1054488891, now seen corresponding path program 18 times [2019-09-07 10:56:21,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:21,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:21,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:21,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:56:21,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:22,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:56:22,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:56:22,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:58:52,146 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 10:58:52,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:58:52,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 10:58:52,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:58:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:52,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:58:52,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 10:58:52,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 10:58:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 10:58:52,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:58:52,244 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand 22 states. [2019-09-07 10:58:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:58:52,568 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2019-09-07 10:58:52,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 10:58:52,569 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-09-07 10:58:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:58:52,571 INFO L225 Difference]: With dead ends: 205 [2019-09-07 10:58:52,571 INFO L226 Difference]: Without dead ends: 193 [2019-09-07 10:58:52,572 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:58:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-09-07 10:58:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2019-09-07 10:58:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-07 10:58:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2019-09-07 10:58:52,577 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 86 [2019-09-07 10:58:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:58:52,577 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2019-09-07 10:58:52,577 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 10:58:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2019-09-07 10:58:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-07 10:58:52,578 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:58:52,578 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:58:52,579 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:58:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:58:52,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1919225366, now seen corresponding path program 19 times [2019-09-07 10:58:52,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:58:52,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:58:52,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:52,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:58:52,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:52,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:58:52,890 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:58:52,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:58:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:53,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:58:53,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:58:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:58:53,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:58:53,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 10:58:53,063 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:58:53,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:58:53,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:58:53,065 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 23 states. [2019-09-07 10:58:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:58:53,382 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2019-09-07 10:58:53,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:58:53,382 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-09-07 10:58:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:58:53,383 INFO L225 Difference]: With dead ends: 214 [2019-09-07 10:58:53,383 INFO L226 Difference]: Without dead ends: 202 [2019-09-07 10:58:53,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:58:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-09-07 10:58:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 99. [2019-09-07 10:58:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-07 10:58:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2019-09-07 10:58:53,390 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 90 [2019-09-07 10:58:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:58:53,390 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2019-09-07 10:58:53,390 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:58:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2019-09-07 10:58:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-07 10:58:53,391 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:58:53,391 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:58:53,391 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:58:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:58:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2005664399, now seen corresponding path program 20 times [2019-09-07 10:58:53,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:58:53,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:58:53,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:53,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:58:53,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:53,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:58:53,738 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:58:53,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:58:53,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:58:53,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:58:53,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:58:53,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:58:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:53,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:58:53,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 10:58:53,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:58:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:58:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:58:53,916 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand 24 states. [2019-09-07 10:58:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:58:54,286 INFO L93 Difference]: Finished difference Result 223 states and 291 transitions. [2019-09-07 10:58:54,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:58:54,288 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-09-07 10:58:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:58:54,290 INFO L225 Difference]: With dead ends: 223 [2019-09-07 10:58:54,290 INFO L226 Difference]: Without dead ends: 211 [2019-09-07 10:58:54,291 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:58:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-09-07 10:58:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 103. [2019-09-07 10:58:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-07 10:58:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2019-09-07 10:58:54,297 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 94 [2019-09-07 10:58:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:58:54,297 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2019-09-07 10:58:54,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:58:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2019-09-07 10:58:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-07 10:58:54,298 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:58:54,298 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:58:54,299 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:58:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:58:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash -343263052, now seen corresponding path program 21 times [2019-09-07 10:58:54,299 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:58:54,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:58:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:54,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:58:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:54,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:58:54,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:58:54,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:01:53,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 11:01:53,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:01:53,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 11:01:53,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:01:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:01:54,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:01:54,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 11:01:54,010 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 11:01:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 11:01:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 11:01:54,010 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 25 states. [2019-09-07 11:01:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:01:54,383 INFO L93 Difference]: Finished difference Result 232 states and 303 transitions. [2019-09-07 11:01:54,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 11:01:54,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-09-07 11:01:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:01:54,386 INFO L225 Difference]: With dead ends: 232 [2019-09-07 11:01:54,386 INFO L226 Difference]: Without dead ends: 220 [2019-09-07 11:01:54,386 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 11:01:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-09-07 11:01:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 107. [2019-09-07 11:01:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-07 11:01:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2019-09-07 11:01:54,393 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 98 [2019-09-07 11:01:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:01:54,394 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2019-09-07 11:01:54,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 11:01:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2019-09-07 11:01:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-07 11:01:54,396 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:01:54,396 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:01:54,396 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:01:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:01:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash 730256473, now seen corresponding path program 22 times [2019-09-07 11:01:54,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:01:54,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:01:54,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:01:54,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:01:54,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:01:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:01:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:01:54,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:01:54,802 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:01:54,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:02:07,001 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:02:07,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:02:07,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 11:02:07,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:02:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:07,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:02:07,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 11:02:07,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 11:02:07,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 11:02:07,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:02:07,070 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 26 states. [2019-09-07 11:02:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:02:07,424 INFO L93 Difference]: Finished difference Result 241 states and 315 transitions. [2019-09-07 11:02:07,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 11:02:07,425 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2019-09-07 11:02:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:02:07,427 INFO L225 Difference]: With dead ends: 241 [2019-09-07 11:02:07,427 INFO L226 Difference]: Without dead ends: 229 [2019-09-07 11:02:07,428 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:02:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-09-07 11:02:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 111. [2019-09-07 11:02:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-07 11:02:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2019-09-07 11:02:07,433 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 102 [2019-09-07 11:02:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:02:07,434 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2019-09-07 11:02:07,434 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 11:02:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2019-09-07 11:02:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-07 11:02:07,435 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:02:07,435 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:02:07,436 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:02:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:02:07,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1630333570, now seen corresponding path program 23 times [2019-09-07 11:02:07,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:02:07,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:02:07,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:07,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:02:07,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:02:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:07,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:02:07,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:02:07,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1