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/reducercommutativity/rangesum60.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 11:11:56,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 11:11:56,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 11:11:56,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 11:11:56,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 11:11:56,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 11:11:56,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 11:11:56,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 11:11:56,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 11:11:56,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 11:11:56,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 11:11:56,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 11:11:56,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 11:11:56,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 11:11:56,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 11:11:56,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 11:11:56,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 11:11:56,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 11:11:56,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 11:11:56,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 11:11:56,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 11:11:56,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 11:11:56,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 11:11:56,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 11:11:56,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 11:11:56,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 11:11:56,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 11:11:56,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 11:11:56,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 11:11:56,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 11:11:56,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 11:11:56,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 11:11:56,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 11:11:56,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 11:11:56,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 11:11:56,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 11:11:56,372 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 11:11:56,392 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 11:11:56,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 11:11:56,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 11:11:56,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 11:11:56,394 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 11:11:56,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 11:11:56,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 11:11:56,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 11:11:56,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 11:11:56,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 11:11:56,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 11:11:56,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 11:11:56,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 11:11:56,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 11:11:56,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 11:11:56,396 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 11:11:56,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 11:11:56,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 11:11:56,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 11:11:56,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 11:11:56,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 11:11:56,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:11:56,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 11:11:56,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 11:11:56,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 11:11:56,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 11:11:56,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 11:11:56,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 11:11:56,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 11:11:56,430 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 11:11:56,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 11:11:56,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 11:11:56,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 11:11:56,455 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 11:11:56,456 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum60.i [2019-09-07 11:11:56,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1927a661e/98aa160e710e45348f9c07b703482bc1/FLAG2a31e442f [2019-09-07 11:11:57,013 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 11:11:57,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum60.i [2019-09-07 11:11:57,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1927a661e/98aa160e710e45348f9c07b703482bc1/FLAG2a31e442f [2019-09-07 11:11:57,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1927a661e/98aa160e710e45348f9c07b703482bc1 [2019-09-07 11:11:57,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 11:11:57,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 11:11:57,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 11:11:57,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 11:11:57,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 11:11:57,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38deb683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57, skipping insertion in model container [2019-09-07 11:11:57,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,369 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 11:11:57,386 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 11:11:57,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:11:57,593 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 11:11:57,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:11:57,719 INFO L192 MainTranslator]: Completed translation [2019-09-07 11:11:57,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57 WrapperNode [2019-09-07 11:11:57,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 11:11:57,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 11:11:57,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 11:11:57,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 11:11:57,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (1/1) ... [2019-09-07 11:11:57,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 11:11:57,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 11:11:57,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 11:11:57,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 11:11:57,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (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 11:11:57,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 11:11:57,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 11:11:57,833 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2019-09-07 11:11:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2019-09-07 11:11:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 11:11:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 11:11:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 11:11:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2019-09-07 11:11:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 11:11:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2019-09-07 11:11:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 11:11:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 11:11:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 11:11:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 11:11:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 11:11:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 11:11:58,195 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 11:11:58,195 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 11:11:58,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:11:58 BoogieIcfgContainer [2019-09-07 11:11:58,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 11:11:58,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 11:11:58,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 11:11:58,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 11:11:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:11:57" (1/3) ... [2019-09-07 11:11:58,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba692d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:11:58, skipping insertion in model container [2019-09-07 11:11:58,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:11:57" (2/3) ... [2019-09-07 11:11:58,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba692d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:11:58, skipping insertion in model container [2019-09-07 11:11:58,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:11:58" (3/3) ... [2019-09-07 11:11:58,208 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2019-09-07 11:11:58,215 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 11:11:58,222 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 11:11:58,239 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 11:11:58,271 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 11:11:58,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 11:11:58,272 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 11:11:58,273 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 11:11:58,273 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 11:11:58,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 11:11:58,273 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 11:11:58,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 11:11:58,273 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 11:11:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-09-07 11:11:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 11:11:58,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:11:58,302 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:11:58,305 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:11:58,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:11:58,310 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2019-09-07 11:11:58,312 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:11:58,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:11:58,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:58,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:58,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:58,453 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2019-09-07 11:11:58,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:11:58,453 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:11:58,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:58,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 1 conjunts are in the unsatisfiable core [2019-09-07 11:11:58,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:11:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 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 11:11:58,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:11:58,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 11:11:58,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 11:11:58,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 11:11:58,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:11:58,609 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-09-07 11:11:58,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:11:58,639 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-09-07 11:11:58,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 11:11:58,641 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2019-09-07 11:11:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:11:58,651 INFO L225 Difference]: With dead ends: 64 [2019-09-07 11:11:58,651 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 11:11:58,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 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 11:11:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 11:11:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-07 11:11:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 11:11:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-09-07 11:11:58,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2019-09-07 11:11:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:11:58,705 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-09-07 11:11:58,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 11:11:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-09-07 11:11:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 11:11:58,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:11:58,709 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:11:58,709 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:11:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:11:58,710 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2019-09-07 11:11:58,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:11:58,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:11:58,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:58,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:58,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:58,728 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:11:58,728 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:11:58,728 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:11:58,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:58,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:11:58,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:11:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:11:58,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:11:58,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:11:58,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:11:58,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:11:58,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:11:58,843 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-09-07 11:11:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:11:58,864 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-09-07 11:11:58,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:11:58,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-09-07 11:11:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:11:58,866 INFO L225 Difference]: With dead ends: 56 [2019-09-07 11:11:58,867 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 11:11:58,868 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 11:11:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 11:11:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-07 11:11:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 11:11:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-09-07 11:11:58,876 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2019-09-07 11:11:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:11:58,877 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-09-07 11:11:58,877 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:11:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-09-07 11:11:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 11:11:58,878 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:11:58,879 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:11:58,879 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:11:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:11:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2019-09-07 11:11:58,880 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:11:58,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:11:58,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:58,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:58,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:58,912 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:11:58,914 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:11:58,915 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:11:58,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:58,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:11:58,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:11:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-07 11:11:59,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:11:59,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:11:59,027 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:11:59,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:11:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:11:59,029 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2019-09-07 11:11:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:11:59,052 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-09-07 11:11:59,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:11:59,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-09-07 11:11:59,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:11:59,057 INFO L225 Difference]: With dead ends: 57 [2019-09-07 11:11:59,058 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 11:11:59,059 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 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 11:11:59,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 11:11:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-07 11:11:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 11:11:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-09-07 11:11:59,069 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2019-09-07 11:11:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:11:59,070 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-09-07 11:11:59,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:11:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-09-07 11:11:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 11:11:59,072 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:11:59,072 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:11:59,072 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:11:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:11:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2019-09-07 11:11:59,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:11:59,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:11:59,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:59,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 11:11:59,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:11:59,143 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) [2019-09-07 11:11:59,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:11:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:59,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:11:59,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:11:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 11:11:59,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:11:59,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 11:11:59,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:11:59,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:11:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:11:59,245 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2019-09-07 11:11:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:11:59,299 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-09-07 11:11:59,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:11:59,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-09-07 11:11:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:11:59,303 INFO L225 Difference]: With dead ends: 62 [2019-09-07 11:11:59,303 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 11:11:59,304 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:11:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 11:11:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-07 11:11:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 11:11:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-09-07 11:11:59,318 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 39 [2019-09-07 11:11:59,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:11:59,319 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-09-07 11:11:59,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:11:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-09-07 11:11:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-07 11:11:59,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:11:59,328 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:11:59,328 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:11:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:11:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2019-09-07 11:11:59,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:11:59,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:11:59,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:59,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-07 11:11:59,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:11:59,436 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:11:59,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:59,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:11:59,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:11:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Stream closed [2019-09-07 11:11:59,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:11:59,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-09-07 11:11:59,547 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:11:59,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:11:59,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:11:59,548 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2019-09-07 11:11:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:11:59,609 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2019-09-07 11:11:59,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:11:59,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-09-07 11:11:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:11:59,612 INFO L225 Difference]: With dead ends: 68 [2019-09-07 11:11:59,612 INFO L226 Difference]: Without dead ends: 44 [2019-09-07 11:11:59,613 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:11:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-07 11:11:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-09-07 11:11:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-07 11:11:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-09-07 11:11:59,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 48 [2019-09-07 11:11:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:11:59,620 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-09-07 11:11:59,621 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:11:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-09-07 11:11:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-07 11:11:59,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:11:59,622 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:11:59,622 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:11:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:11:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1681907214, now seen corresponding path program 1 times [2019-09-07 11:11:59,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:11:59,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:11:59,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:59,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,636 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:11:59,637 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:11:59,637 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 11:11:59,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:11:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:11:59,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:11:59,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:11:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 11:11:59,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:11:59,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-09-07 11:11:59,767 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:11:59,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:11:59,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:11:59,768 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 4 states. [2019-09-07 11:11:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:11:59,795 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2019-09-07 11:11:59,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:11:59,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2019-09-07 11:11:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:11:59,798 INFO L225 Difference]: With dead ends: 68 [2019-09-07 11:11:59,798 INFO L226 Difference]: Without dead ends: 41 [2019-09-07 11:11:59,799 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:11:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-07 11:11:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-09-07 11:11:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 11:11:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-09-07 11:11:59,810 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 59 [2019-09-07 11:11:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:11:59,810 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-09-07 11:11:59,811 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:11:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-09-07 11:11:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 11:11:59,813 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:11:59,814 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:11:59,814 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:11:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:11:59,815 INFO L82 PathProgramCache]: Analyzing trace with hash 804630256, now seen corresponding path program 2 times [2019-09-07 11:11:59,815 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:11:59,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:11:59,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:11:59,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:11:59,848 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:11:59,850 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:11:59,850 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 11:11:59,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:11:59,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:11:59,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:11:59,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:11:59,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:11:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 11:11:59,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:11:59,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 11:11:59,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:11:59,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:11:59,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:11:59,970 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2019-09-07 11:12:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:00,007 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-09-07 11:12:00,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:12:00,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-09-07 11:12:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:00,009 INFO L225 Difference]: With dead ends: 70 [2019-09-07 11:12:00,009 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 11:12:00,010 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 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 11:12:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 11:12:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-07 11:12:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 11:12:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-09-07 11:12:00,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 61 [2019-09-07 11:12:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:00,019 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-09-07 11:12:00,019 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:12:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-09-07 11:12:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-07 11:12:00,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:00,021 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:00,021 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1929644946, now seen corresponding path program 3 times [2019-09-07 11:12:00,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:00,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:00,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:00,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,034 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:00,035 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:00,035 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:00,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:12:00,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 11:12:00,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:00,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:12:00,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-09-07 11:12:00,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:00,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 11:12:00,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:12:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:12:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:12:00,121 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2019-09-07 11:12:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:00,170 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2019-09-07 11:12:00,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:12:00,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-09-07 11:12:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:00,177 INFO L225 Difference]: With dead ends: 70 [2019-09-07 11:12:00,177 INFO L226 Difference]: Without dead ends: 47 [2019-09-07 11:12:00,178 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 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 11:12:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-07 11:12:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-09-07 11:12:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-07 11:12:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-09-07 11:12:00,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 63 [2019-09-07 11:12:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:00,196 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-09-07 11:12:00,199 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:12:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-09-07 11:12:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 11:12:00,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:00,201 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:00,202 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash -575638740, now seen corresponding path program 4 times [2019-09-07 11:12:00,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:00,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:00,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:00,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,233 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:00,236 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:00,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:00,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:12:00,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:12:00,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:00,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:12:00,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 65 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-07 11:12:00,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:00,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 11:12:00,376 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:12:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:12:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:12:00,377 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 6 states. [2019-09-07 11:12:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:00,440 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-09-07 11:12:00,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:12:00,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-09-07 11:12:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:00,443 INFO L225 Difference]: With dead ends: 76 [2019-09-07 11:12:00,445 INFO L226 Difference]: Without dead ends: 50 [2019-09-07 11:12:00,446 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:12:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-07 11:12:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2019-09-07 11:12:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 11:12:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-09-07 11:12:00,455 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 72 [2019-09-07 11:12:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:00,455 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-09-07 11:12:00,455 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:12:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-09-07 11:12:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 11:12:00,458 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:00,458 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:00,459 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash -680152530, now seen corresponding path program 5 times [2019-09-07 11:12:00,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:00,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:00,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:00,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,476 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:00,476 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:00,477 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 11:12:00,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:00,622 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 11:12:00,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:00,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:12:00,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 11:12:00,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:00,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-09-07 11:12:00,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:12:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:12:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:12:00,663 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 4 states. [2019-09-07 11:12:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:00,703 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2019-09-07 11:12:00,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:12:00,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-09-07 11:12:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:00,706 INFO L225 Difference]: With dead ends: 81 [2019-09-07 11:12:00,706 INFO L226 Difference]: Without dead ends: 52 [2019-09-07 11:12:00,707 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:12:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-07 11:12:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-09-07 11:12:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 11:12:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-09-07 11:12:00,722 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 81 [2019-09-07 11:12:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:00,724 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-09-07 11:12:00,724 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:12:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-09-07 11:12:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-07 11:12:00,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:00,726 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:00,726 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:00,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:00,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1893345446, now seen corresponding path program 6 times [2019-09-07 11:12:00,727 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:00,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:00,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:00,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,753 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:00,753 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:00,753 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:00,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:12:00,920 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 11:12:00,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:00,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:12:00,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-09-07 11:12:00,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:00,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-09-07 11:12:00,961 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:12:00,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:12:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:12:00,965 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 4 states. [2019-09-07 11:12:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:00,981 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2019-09-07 11:12:00,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:12:00,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-09-07 11:12:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:00,982 INFO L225 Difference]: With dead ends: 80 [2019-09-07 11:12:00,983 INFO L226 Difference]: Without dead ends: 54 [2019-09-07 11:12:00,983 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:12:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-07 11:12:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-09-07 11:12:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-07 11:12:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-09-07 11:12:00,991 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 90 [2019-09-07 11:12:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:00,992 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-09-07 11:12:00,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:12:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-09-07 11:12:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-07 11:12:00,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:00,993 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:00,993 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:00,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:00,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1039813832, now seen corresponding path program 7 times [2019-09-07 11:12:00,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:00,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:00,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:00,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:00,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,006 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:01,006 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:01,006 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:01,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:12:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:12:01,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:12:01,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-09-07 11:12:01,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:01,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 11:12:01,114 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:12:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:12:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:12:01,115 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 6 states. [2019-09-07 11:12:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:01,140 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-09-07 11:12:01,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:12:01,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2019-09-07 11:12:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:01,142 INFO L225 Difference]: With dead ends: 94 [2019-09-07 11:12:01,145 INFO L226 Difference]: Without dead ends: 56 [2019-09-07 11:12:01,145 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:12:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-07 11:12:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-09-07 11:12:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 11:12:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-09-07 11:12:01,160 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 92 [2019-09-07 11:12:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:01,160 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-09-07 11:12:01,160 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:12:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-09-07 11:12:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-07 11:12:01,161 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:01,162 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:01,162 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -919939190, now seen corresponding path program 8 times [2019-09-07 11:12:01,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:01,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:01,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:12:01,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,191 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:01,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:01,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:01,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:12:01,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:12:01,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:01,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:12:01,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-09-07 11:12:01,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:01,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 11:12:01,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:12:01,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:12:01,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:12:01,316 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 7 states. [2019-09-07 11:12:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:01,357 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2019-09-07 11:12:01,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:12:01,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2019-09-07 11:12:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:01,359 INFO L225 Difference]: With dead ends: 96 [2019-09-07 11:12:01,359 INFO L226 Difference]: Without dead ends: 58 [2019-09-07 11:12:01,360 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:12:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-07 11:12:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-09-07 11:12:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-07 11:12:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-09-07 11:12:01,365 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 94 [2019-09-07 11:12:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:01,365 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-09-07 11:12:01,365 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:12:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-09-07 11:12:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 11:12:01,367 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:01,367 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:01,367 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1248049612, now seen corresponding path program 9 times [2019-09-07 11:12:01,368 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:01,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:01,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:01,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,379 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:01,380 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:01,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:01,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:12:01,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 11:12:01,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:01,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:12:01,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-09-07 11:12:01,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:01,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 11:12:01,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:12:01,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:12:01,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:12:01,550 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2019-09-07 11:12:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:01,573 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2019-09-07 11:12:01,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:12:01,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2019-09-07 11:12:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:01,575 INFO L225 Difference]: With dead ends: 86 [2019-09-07 11:12:01,575 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 11:12:01,576 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 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 11:12:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 11:12:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-09-07 11:12:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 11:12:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-09-07 11:12:01,581 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 96 [2019-09-07 11:12:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:01,582 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-09-07 11:12:01,582 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:12:01,582 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-09-07 11:12:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-07 11:12:01,583 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:01,583 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:01,584 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash -614192018, now seen corresponding path program 10 times [2019-09-07 11:12:01,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:01,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:01,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:01,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,597 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:01,597 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:01,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:01,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:12:01,681 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:12:01,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:01,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:12:01,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:12:01,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:01,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 11:12:01,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:12:01,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:12:01,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:12:01,737 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 6 states. [2019-09-07 11:12:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:01,758 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2019-09-07 11:12:01,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:12:01,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-09-07 11:12:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:01,759 INFO L225 Difference]: With dead ends: 88 [2019-09-07 11:12:01,759 INFO L226 Difference]: Without dead ends: 62 [2019-09-07 11:12:01,760 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:12:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-07 11:12:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-09-07 11:12:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-07 11:12:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-09-07 11:12:01,765 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 98 [2019-09-07 11:12:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:01,766 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-09-07 11:12:01,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:12:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-09-07 11:12:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-07 11:12:01,767 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:01,767 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:01,767 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash 772963984, now seen corresponding path program 11 times [2019-09-07 11:12:01,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:01,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:01,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:01,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,779 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:01,779 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:01,779 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:01,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:12:01,846 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 11:12:01,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:01,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:12:01,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 192 proven. 15 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2019-09-07 11:12:01,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:01,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 11:12:01,904 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:12:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:12:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:12:01,905 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 7 states. [2019-09-07 11:12:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:01,947 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2019-09-07 11:12:01,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:12:01,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2019-09-07 11:12:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:01,949 INFO L225 Difference]: With dead ends: 104 [2019-09-07 11:12:01,949 INFO L226 Difference]: Without dead ends: 66 [2019-09-07 11:12:01,949 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:12:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-07 11:12:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-09-07 11:12:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-07 11:12:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-09-07 11:12:01,954 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 100 [2019-09-07 11:12:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:01,955 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-09-07 11:12:01,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:12:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-09-07 11:12:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-07 11:12:01,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:01,956 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:01,957 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:01,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1268541062, now seen corresponding path program 12 times [2019-09-07 11:12:01,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:01,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:01,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:01,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:01,968 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:01,969 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:01,969 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:01,988 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:12:02,272 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-07 11:12:02,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:02,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:12:02,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 250 proven. 16 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-09-07 11:12:02,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:02,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 11:12:02,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:12:02,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:12:02,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:12:02,333 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 7 states. [2019-09-07 11:12:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:02,366 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2019-09-07 11:12:02,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:12:02,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2019-09-07 11:12:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:02,368 INFO L225 Difference]: With dead ends: 96 [2019-09-07 11:12:02,368 INFO L226 Difference]: Without dead ends: 67 [2019-09-07 11:12:02,368 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:12:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-07 11:12:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-09-07 11:12:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 11:12:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-09-07 11:12:02,373 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 109 [2019-09-07 11:12:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:02,374 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-09-07 11:12:02,374 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:12:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-09-07 11:12:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 11:12:02,375 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:02,375 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:02,376 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash -188704604, now seen corresponding path program 13 times [2019-09-07 11:12:02,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:02,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:02,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:02,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:02,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:02,388 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:02,388 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:02,388 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 11:12:02,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:12:02,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:12:02,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:12:02,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:02,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-07 11:12:02,511 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 11:12:02,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 11:12:02,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:12:02,511 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 8 states. [2019-09-07 11:12:02,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:02,544 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2019-09-07 11:12:02,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 11:12:02,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2019-09-07 11:12:02,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:02,545 INFO L225 Difference]: With dead ends: 116 [2019-09-07 11:12:02,545 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 11:12:02,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:12:02,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 11:12:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-09-07 11:12:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 11:12:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2019-09-07 11:12:02,550 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 111 [2019-09-07 11:12:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:02,551 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2019-09-07 11:12:02,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 11:12:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2019-09-07 11:12:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-07 11:12:02,552 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:02,553 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:02,553 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2117844318, now seen corresponding path program 14 times [2019-09-07 11:12:02,553 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:02,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:02,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:02,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:12:02,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:02,577 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:02,577 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:02,577 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:02,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:12:02,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:12:02,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:02,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:12:02,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Exception during sending of exit command (exit): Stream closed [2019-09-07 11:12:02,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:02,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 11:12:02,733 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 11:12:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 11:12:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 11:12:02,734 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 9 states. [2019-09-07 11:12:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:02,772 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2019-09-07 11:12:02,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 11:12:02,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2019-09-07 11:12:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:02,775 INFO L225 Difference]: With dead ends: 118 [2019-09-07 11:12:02,775 INFO L226 Difference]: Without dead ends: 71 [2019-09-07 11:12:02,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 11:12:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-07 11:12:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-09-07 11:12:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-07 11:12:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-09-07 11:12:02,781 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 113 [2019-09-07 11:12:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:02,781 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-09-07 11:12:02,781 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 11:12:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-09-07 11:12:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-07 11:12:02,783 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:02,783 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 12, 7, 7, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:02,783 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:02,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:02,784 INFO L82 PathProgramCache]: Analyzing trace with hash -595237600, now seen corresponding path program 15 times [2019-09-07 11:12:02,784 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:02,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:02,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:02,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:02,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:02,800 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:02,800 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:02,801 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:02,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:12:03,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 11:12:03,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:03,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:12:03,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 250 proven. 25 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-09-07 11:12:03,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:03,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-07 11:12:03,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 11:12:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 11:12:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:12:03,161 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2019-09-07 11:12:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:03,190 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2019-09-07 11:12:03,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 11:12:03,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 115 [2019-09-07 11:12:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:03,191 INFO L225 Difference]: With dead ends: 102 [2019-09-07 11:12:03,191 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 11:12:03,192 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:12:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 11:12:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-09-07 11:12:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 11:12:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-09-07 11:12:03,196 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 115 [2019-09-07 11:12:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:03,197 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-09-07 11:12:03,197 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 11:12:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-09-07 11:12:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-07 11:12:03,198 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:03,198 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 12, 7, 7, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:03,199 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash -278636354, now seen corresponding path program 16 times [2019-09-07 11:12:03,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:03,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:03,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:03,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:03,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:03,210 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:03,211 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:03,211 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:03,226 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:12:03,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:12:03,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:03,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 11:12:03,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2019-09-07 11:12:03,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:03,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-07 11:12:03,344 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 11:12:03,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 11:12:03,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:12:03,345 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 10 states. [2019-09-07 11:12:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:03,378 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2019-09-07 11:12:03,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 11:12:03,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 117 [2019-09-07 11:12:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:03,383 INFO L225 Difference]: With dead ends: 124 [2019-09-07 11:12:03,383 INFO L226 Difference]: Without dead ends: 75 [2019-09-07 11:12:03,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:12:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-07 11:12:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-09-07 11:12:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-07 11:12:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-09-07 11:12:03,388 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 117 [2019-09-07 11:12:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:03,388 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-09-07 11:12:03,388 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 11:12:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-09-07 11:12:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 11:12:03,389 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:03,390 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 12, 8, 8, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:03,390 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash -407630788, now seen corresponding path program 17 times [2019-09-07 11:12:03,390 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:03,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:03,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:03,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:03,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:03,402 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:03,402 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:03,402 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 11:12:03,422 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:12:03,460 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 11:12:03,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:12:03,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:12:03,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:12:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 330 proven. 7 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:12:03,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:12:03,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 11:12:03,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:12:03,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:12:03,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:12:03,498 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 5 states. [2019-09-07 11:12:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:12:03,537 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2019-09-07 11:12:03,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:12:03,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-09-07 11:12:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:12:03,541 INFO L225 Difference]: With dead ends: 123 [2019-09-07 11:12:03,541 INFO L226 Difference]: Without dead ends: 78 [2019-09-07 11:12:03,542 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 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 11:12:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-07 11:12:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-09-07 11:12:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-07 11:12:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-09-07 11:12:03,549 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 119 [2019-09-07 11:12:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:12:03,549 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-09-07 11:12:03,549 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:12:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-09-07 11:12:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 11:12:03,550 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:12:03,551 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:12:03,551 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:12:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:12:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1895654752, now seen corresponding path program 18 times [2019-09-07 11:12:03,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:12:03,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:12:03,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:03,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:12:03,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:12:03,568 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 11:12:03,568 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 11:12:03,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 11:12:03,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true