java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 00:08:27,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 00:08:27,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 00:08:27,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 00:08:27,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 00:08:27,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 00:08:27,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 00:08:27,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 00:08:27,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 00:08:27,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 00:08:27,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 00:08:27,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 00:08:27,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 00:08:27,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 00:08:27,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 00:08:27,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 00:08:27,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 00:08:27,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 00:08:27,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 00:08:27,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 00:08:27,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 00:08:27,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 00:08:27,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 00:08:27,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 00:08:27,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 00:08:27,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 00:08:27,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 00:08:27,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 00:08:27,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 00:08:27,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 00:08:27,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 00:08:27,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 00:08:27,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 00:08:27,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 00:08:27,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 00:08:27,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 00:08:27,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 00:08:27,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 00:08:27,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 00:08:27,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 00:08:27,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 00:08:27,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 00:08:27,652 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 00:08:27,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 00:08:27,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 00:08:27,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 00:08:27,654 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 00:08:27,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 00:08:27,654 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 00:08:27,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 00:08:27,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 00:08:27,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 00:08:27,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 00:08:27,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 00:08:27,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 00:08:27,655 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 00:08:27,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 00:08:27,656 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 00:08:27,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 00:08:27,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 00:08:27,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 00:08:27,656 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 00:08:27,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 00:08:27,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 00:08:27,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 00:08:27,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 00:08:27,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 00:08:27,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 00:08:27,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 00:08:27,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 00:08:27,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 00:08:27,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 00:08:27,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 00:08:27,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 00:08:27,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 00:08:27,706 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 00:08:27,707 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-02 00:08:27,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c60b1d70/e0ecc00a6188468b9dae0a423d1edb40/FLAG6ae915af5 [2019-10-02 00:08:28,229 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 00:08:28,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-02 00:08:28,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c60b1d70/e0ecc00a6188468b9dae0a423d1edb40/FLAG6ae915af5 [2019-10-02 00:08:28,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c60b1d70/e0ecc00a6188468b9dae0a423d1edb40 [2019-10-02 00:08:28,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 00:08:28,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 00:08:28,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 00:08:28,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 00:08:28,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 00:08:28,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:28,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a632ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28, skipping insertion in model container [2019-10-02 00:08:28,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:28,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 00:08:28,689 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 00:08:28,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:08:28,881 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 00:08:28,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:08:28,938 INFO L192 MainTranslator]: Completed translation [2019-10-02 00:08:28,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28 WrapperNode [2019-10-02 00:08:28,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 00:08:28,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 00:08:28,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 00:08:28,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 00:08:29,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:29,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:29,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:29,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:29,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:29,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:29,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... [2019-10-02 00:08:29,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 00:08:29,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 00:08:29,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 00:08:29,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 00:08:29,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 00:08:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 00:08:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 00:08:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 00:08:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 00:08:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 00:08:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 00:08:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 00:08:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 00:08:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 00:08:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 00:08:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 00:08:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 00:08:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 00:08:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 00:08:29,446 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 00:08:29,447 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-02 00:08:29,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:08:29 BoogieIcfgContainer [2019-10-02 00:08:29,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 00:08:29,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 00:08:29,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 00:08:29,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 00:08:29,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 12:08:28" (1/3) ... [2019-10-02 00:08:29,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20856dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:08:29, skipping insertion in model container [2019-10-02 00:08:29,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:08:28" (2/3) ... [2019-10-02 00:08:29,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20856dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:08:29, skipping insertion in model container [2019-10-02 00:08:29,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:08:29" (3/3) ... [2019-10-02 00:08:29,467 INFO L109 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2019-10-02 00:08:29,477 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 00:08:29,484 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 00:08:29,500 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 00:08:29,528 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 00:08:29,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 00:08:29,529 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 00:08:29,529 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 00:08:29,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 00:08:29,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 00:08:29,530 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 00:08:29,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 00:08:29,530 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 00:08:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-02 00:08:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 00:08:29,552 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:29,553 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:29,556 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1375180307, now seen corresponding path program 1 times [2019-10-02 00:08:29,562 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:29,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:29,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:29,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:29,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:29,668 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:29,668 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:29,669 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:29,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:08:29,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-02 00:08:29,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:08:29,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:08:29,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 00:08:29,775 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 00:08:29,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 00:08:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 00:08:29,789 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-10-02 00:08:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:29,811 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-10-02 00:08:29,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 00:08:29,813 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-02 00:08:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:29,819 INFO L225 Difference]: With dead ends: 54 [2019-10-02 00:08:29,819 INFO L226 Difference]: Without dead ends: 25 [2019-10-02 00:08:29,823 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 00:08:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-02 00:08:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-02 00:08:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-02 00:08:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-02 00:08:29,859 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2019-10-02 00:08:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:29,859 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-02 00:08:29,859 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 00:08:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-02 00:08:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 00:08:29,861 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:29,861 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:29,861 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1308846031, now seen corresponding path program 1 times [2019-10-02 00:08:29,862 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:29,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:29,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:29,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:29,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:29,872 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:29,872 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:29,873 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:29,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:08:29,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:08:29,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:08:30,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:08:30,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 00:08:30,009 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 00:08:30,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 00:08:30,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:08:30,011 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2019-10-02 00:08:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:30,079 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2019-10-02 00:08:30,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 00:08:30,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-02 00:08:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:30,081 INFO L225 Difference]: With dead ends: 44 [2019-10-02 00:08:30,082 INFO L226 Difference]: Without dead ends: 30 [2019-10-02 00:08:30,083 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:08:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-02 00:08:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-10-02 00:08:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-02 00:08:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-02 00:08:30,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-10-02 00:08:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:30,091 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-02 00:08:30,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 00:08:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-02 00:08:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-02 00:08:30,092 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:30,092 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:30,092 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1886649102, now seen corresponding path program 1 times [2019-10-02 00:08:30,093 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:30,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:30,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:30,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,103 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:30,103 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:30,104 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:30,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:08:30,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:08:30,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:08:30,189 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:08:30,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:08:30,190 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:08:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:08:30,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:08:30,191 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-02 00:08:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:30,297 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-10-02 00:08:30,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:08:30,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-02 00:08:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:30,302 INFO L225 Difference]: With dead ends: 54 [2019-10-02 00:08:30,302 INFO L226 Difference]: Without dead ends: 35 [2019-10-02 00:08:30,304 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:08:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-02 00:08:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2019-10-02 00:08:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-02 00:08:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-02 00:08:30,332 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-10-02 00:08:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:30,333 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-02 00:08:30,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:08:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-02 00:08:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-02 00:08:30,334 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:30,334 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:30,335 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:30,335 INFO L82 PathProgramCache]: Analyzing trace with hash -464275123, now seen corresponding path program 1 times [2019-10-02 00:08:30,335 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:30,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:30,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:30,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,344 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:30,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:30,345 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:30,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:08:30,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 00:08:30,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:08:30,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:08:30,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:08:30,433 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:08:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:08:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:08:30,434 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-02 00:08:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:30,503 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-10-02 00:08:30,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:08:30,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-02 00:08:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:30,505 INFO L225 Difference]: With dead ends: 54 [2019-10-02 00:08:30,505 INFO L226 Difference]: Without dead ends: 33 [2019-10-02 00:08:30,506 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:08:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-02 00:08:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-02 00:08:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-02 00:08:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-02 00:08:30,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2019-10-02 00:08:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:30,515 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-02 00:08:30,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:08:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-02 00:08:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 00:08:30,516 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:30,516 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:30,517 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash -727027933, now seen corresponding path program 1 times [2019-10-02 00:08:30,517 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:30,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:30,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:30,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,526 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:30,526 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:30,526 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:30,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:08:30,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 00:08:30,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:08:30,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:30,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 00:08:30,623 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 00:08:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 00:08:30,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 00:08:30,623 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-10-02 00:08:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:30,710 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-02 00:08:30,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 00:08:30,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-02 00:08:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:30,712 INFO L225 Difference]: With dead ends: 60 [2019-10-02 00:08:30,712 INFO L226 Difference]: Without dead ends: 37 [2019-10-02 00:08:30,713 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 00:08:30,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-02 00:08:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-02 00:08:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-02 00:08:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-02 00:08:30,721 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2019-10-02 00:08:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:30,721 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-02 00:08:30,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 00:08:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-02 00:08:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-02 00:08:30,722 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:30,723 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:30,723 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash -282430451, now seen corresponding path program 2 times [2019-10-02 00:08:30,724 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:30,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:30,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:30,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,731 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:30,731 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:30,732 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:30,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 00:08:30,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:08:30,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:30,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 00:08:30,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:08:30,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:30,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 00:08:30,857 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 00:08:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 00:08:30,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:08:30,861 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-10-02 00:08:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:30,948 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2019-10-02 00:08:30,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 00:08:30,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-02 00:08:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:30,949 INFO L225 Difference]: With dead ends: 68 [2019-10-02 00:08:30,950 INFO L226 Difference]: Without dead ends: 41 [2019-10-02 00:08:30,950 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:08:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-02 00:08:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-02 00:08:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 00:08:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-02 00:08:30,958 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2019-10-02 00:08:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:30,959 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-02 00:08:30,959 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 00:08:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-02 00:08:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-02 00:08:30,960 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:30,961 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:30,961 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash 615189603, now seen corresponding path program 3 times [2019-10-02 00:08:30,962 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:30,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:30,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:30,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:30,976 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:30,976 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:30,976 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:31,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 00:08:31,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-02 00:08:31,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:31,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 00:08:31,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-02 00:08:31,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:31,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 00:08:31,064 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:08:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:08:31,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:08:31,065 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2019-10-02 00:08:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:31,133 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2019-10-02 00:08:31,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:08:31,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-02 00:08:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:31,135 INFO L225 Difference]: With dead ends: 77 [2019-10-02 00:08:31,135 INFO L226 Difference]: Without dead ends: 55 [2019-10-02 00:08:31,135 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:08:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-02 00:08:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-10-02 00:08:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-02 00:08:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-10-02 00:08:31,144 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 24 [2019-10-02 00:08:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:31,145 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-10-02 00:08:31,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:08:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-10-02 00:08:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-02 00:08:31,146 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:31,146 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:31,146 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash 550587983, now seen corresponding path program 4 times [2019-10-02 00:08:31,147 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:31,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:31,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:31,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:31,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:31,154 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:31,154 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:31,154 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 00:08:31,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:31,200 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 00:08:31,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:31,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 00:08:31,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-02 00:08:31,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:31,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 00:08:31,271 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 00:08:31,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 00:08:31,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:08:31,272 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 8 states. [2019-10-02 00:08:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:31,495 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2019-10-02 00:08:31,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 00:08:31,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-10-02 00:08:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:31,497 INFO L225 Difference]: With dead ends: 126 [2019-10-02 00:08:31,497 INFO L226 Difference]: Without dead ends: 93 [2019-10-02 00:08:31,500 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-02 00:08:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-02 00:08:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2019-10-02 00:08:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-02 00:08:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2019-10-02 00:08:31,530 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 33 [2019-10-02 00:08:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:31,531 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2019-10-02 00:08:31,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 00:08:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2019-10-02 00:08:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-02 00:08:31,536 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:31,537 INFO L411 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:31,537 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -98839249, now seen corresponding path program 5 times [2019-10-02 00:08:31,538 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:31,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:31,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:31,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:31,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:31,558 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:31,558 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:31,558 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:31,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 00:08:31,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-02 00:08:31,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:31,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 00:08:31,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-02 00:08:31,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:31,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 00:08:31,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 00:08:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 00:08:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-02 00:08:31,827 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 9 states. [2019-10-02 00:08:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:32,173 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2019-10-02 00:08:32,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 00:08:32,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-10-02 00:08:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:32,179 INFO L225 Difference]: With dead ends: 168 [2019-10-02 00:08:32,179 INFO L226 Difference]: Without dead ends: 117 [2019-10-02 00:08:32,183 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2019-10-02 00:08:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-02 00:08:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2019-10-02 00:08:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-02 00:08:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2019-10-02 00:08:32,211 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 45 [2019-10-02 00:08:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:32,211 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2019-10-02 00:08:32,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 00:08:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2019-10-02 00:08:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-02 00:08:32,216 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:32,216 INFO L411 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:32,216 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1998480783, now seen corresponding path program 6 times [2019-10-02 00:08:32,217 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:32,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:32,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:32,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:32,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:32,236 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:32,236 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:32,236 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:32,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 00:08:32,286 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-02 00:08:32,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:32,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 00:08:32,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 201 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-02 00:08:32,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:32,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 00:08:32,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 00:08:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 00:08:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:08:32,352 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 7 states. [2019-10-02 00:08:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:32,456 INFO L93 Difference]: Finished difference Result 200 states and 256 transitions. [2019-10-02 00:08:32,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 00:08:32,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2019-10-02 00:08:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:32,458 INFO L225 Difference]: With dead ends: 200 [2019-10-02 00:08:32,458 INFO L226 Difference]: Without dead ends: 117 [2019-10-02 00:08:32,460 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 00:08:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-02 00:08:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2019-10-02 00:08:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-02 00:08:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2019-10-02 00:08:32,478 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 57 [2019-10-02 00:08:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:32,478 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2019-10-02 00:08:32,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 00:08:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2019-10-02 00:08:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-02 00:08:32,480 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:32,480 INFO L411 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:32,480 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1557287797, now seen corresponding path program 7 times [2019-10-02 00:08:32,481 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:32,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:32,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:32,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:32,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:32,488 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:32,488 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:32,488 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 00:08:32,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:08:32,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 00:08:32,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-02 00:08:32,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:32,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 00:08:32,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 00:08:32,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 00:08:32,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:08:32,637 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand 8 states. [2019-10-02 00:08:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:32,754 INFO L93 Difference]: Finished difference Result 229 states and 291 transitions. [2019-10-02 00:08:32,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 00:08:32,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2019-10-02 00:08:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:32,757 INFO L225 Difference]: With dead ends: 229 [2019-10-02 00:08:32,757 INFO L226 Difference]: Without dead ends: 132 [2019-10-02 00:08:32,758 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:08:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-02 00:08:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2019-10-02 00:08:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-02 00:08:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2019-10-02 00:08:32,808 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 63 [2019-10-02 00:08:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:32,809 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2019-10-02 00:08:32,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 00:08:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2019-10-02 00:08:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-02 00:08:32,816 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:32,816 INFO L411 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:32,817 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:32,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1777595919, now seen corresponding path program 8 times [2019-10-02 00:08:32,817 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:32,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:32,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:32,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:08:32,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:32,832 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:32,832 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:32,832 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:32,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 00:08:32,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 00:08:32,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:32,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 00:08:32,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-10-02 00:08:32,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:32,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 00:08:32,998 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 00:08:32,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 00:08:32,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 00:08:32,998 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand 9 states. [2019-10-02 00:08:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:33,110 INFO L93 Difference]: Finished difference Result 258 states and 326 transitions. [2019-10-02 00:08:33,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 00:08:33,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2019-10-02 00:08:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:33,112 INFO L225 Difference]: With dead ends: 258 [2019-10-02 00:08:33,113 INFO L226 Difference]: Without dead ends: 147 [2019-10-02 00:08:33,113 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 00:08:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-02 00:08:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2019-10-02 00:08:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-10-02 00:08:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2019-10-02 00:08:33,132 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 69 [2019-10-02 00:08:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:33,133 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2019-10-02 00:08:33,133 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 00:08:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2019-10-02 00:08:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-02 00:08:33,134 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:33,134 INFO L411 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:33,134 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:33,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1500778997, now seen corresponding path program 9 times [2019-10-02 00:08:33,135 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:33,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:33,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:33,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:33,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:33,142 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:33,143 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:33,143 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 00:08:33,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:33,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-02 00:08:33,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:33,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 00:08:33,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 260 proven. 21 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2019-10-02 00:08:33,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:33,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 00:08:33,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 00:08:33,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 00:08:33,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 00:08:33,339 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand 10 states. [2019-10-02 00:08:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:33,462 INFO L93 Difference]: Finished difference Result 287 states and 361 transitions. [2019-10-02 00:08:33,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 00:08:33,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2019-10-02 00:08:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:33,466 INFO L225 Difference]: With dead ends: 287 [2019-10-02 00:08:33,466 INFO L226 Difference]: Without dead ends: 162 [2019-10-02 00:08:33,468 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 00:08:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-02 00:08:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2019-10-02 00:08:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-02 00:08:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 188 transitions. [2019-10-02 00:08:33,492 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 188 transitions. Word has length 75 [2019-10-02 00:08:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:33,492 INFO L475 AbstractCegarLoop]: Abstraction has 155 states and 188 transitions. [2019-10-02 00:08:33,492 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 00:08:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 188 transitions. [2019-10-02 00:08:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-02 00:08:33,493 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:33,494 INFO L411 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:33,494 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1294358897, now seen corresponding path program 10 times [2019-10-02 00:08:33,494 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:33,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:33,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:33,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:33,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:33,511 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:33,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:33,511 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 00:08:33,533 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 00:08:33,583 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 00:08:33,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:08:33,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-02 00:08:33,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:08:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 624 proven. 208 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 00:08:33,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:08:33,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 00:08:33,747 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 00:08:33,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 00:08:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-10-02 00:08:33,748 INFO L87 Difference]: Start difference. First operand 155 states and 188 transitions. Second operand 14 states. [2019-10-02 00:08:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:08:34,084 INFO L93 Difference]: Finished difference Result 358 states and 443 transitions. [2019-10-02 00:08:34,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 00:08:34,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2019-10-02 00:08:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:08:34,087 INFO L225 Difference]: With dead ends: 358 [2019-10-02 00:08:34,087 INFO L226 Difference]: Without dead ends: 241 [2019-10-02 00:08:34,088 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2019-10-02 00:08:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-10-02 00:08:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2019-10-02 00:08:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-02 00:08:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 242 transitions. [2019-10-02 00:08:34,112 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 242 transitions. Word has length 81 [2019-10-02 00:08:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:08:34,112 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 242 transitions. [2019-10-02 00:08:34,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 00:08:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 242 transitions. [2019-10-02 00:08:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 00:08:34,114 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:08:34,114 INFO L411 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:08:34,114 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:08:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:08:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash -552358545, now seen corresponding path program 11 times [2019-10-02 00:08:34,115 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:08:34,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:08:34,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:34,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:08:34,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:08:34,123 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:08:34,123 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:08:34,123 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 00:08:34,151 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true