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/max-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:40:09,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:40:09,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:40:09,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 12:40:09,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 12:40:09,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 12:40:09,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 12:40:09,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 12:40:09,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 12:40:09,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 12:40:09,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 12:40:09,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 12:40:09,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:40:09,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:40:09,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:40:09,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:40:09,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:40:09,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:40:09,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:40:09,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:40:09,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:40:09,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:40:09,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:40:09,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:40:09,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-07 12:40:09,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-07 12:40:09,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-07 12:40:09,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-07 12:40:09,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-07 12:40:09,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-07 12:40:09,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 12:40:09,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 12:40:09,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 12:40:09,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 12:40:09,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 12:40:09,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 12:40:09,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 12:40:09,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 12:40:09,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:40:09,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:40:09,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:40:09,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 12:40:09,798 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:40:09,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:40:09,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:40:09,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:40:09,800 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:40:09,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:40:09,801 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:40:09,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:40:09,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:40:09,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:40:09,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:40:09,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:40:09,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:40:09,802 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:40:09,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:40:09,802 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:40:09,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:40:09,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:40:09,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:40:09,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:40:09,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:40:09,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:40:09,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:40:09,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:40:09,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:40:09,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:40:09,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:40:09,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:40:09,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:40:09,833 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:40:09,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:40:09,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:40:09,849 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:40:09,850 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:40:09,850 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-09-07 12:40:09,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8873cdf15/aa2d04f1b7c948839efae0a68a9ee42e/FLAG44da08c58 [2019-09-07 12:40:10,333 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:40:10,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-09-07 12:40:10,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8873cdf15/aa2d04f1b7c948839efae0a68a9ee42e/FLAG44da08c58 [2019-09-07 12:40:10,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8873cdf15/aa2d04f1b7c948839efae0a68a9ee42e [2019-09-07 12:40:10,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:40:10,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:40:10,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:40:10,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:40:10,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:40:10,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:40:10" (1/1) ... [2019-09-07 12:40:10,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74acbc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:10, skipping insertion in model container [2019-09-07 12:40:10,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:40:10" (1/1) ... [2019-09-07 12:40:10,706 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:40:10,721 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:40:10,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:40:10,879 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:40:10,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:40:11,004 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:40:11,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11 WrapperNode [2019-09-07 12:40:11,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:40:11,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:40:11,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:40:11,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:40:11,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... [2019-09-07 12:40:11,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... [2019-09-07 12:40:11,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... [2019-09-07 12:40:11,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... [2019-09-07 12:40:11,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... [2019-09-07 12:40:11,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... [2019-09-07 12:40:11,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... [2019-09-07 12:40:11,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:40:11,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:40:11,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:40:11,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:40:11,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:40:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:40:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:40:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 12:40:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:40:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:40:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 12:40:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 12:40:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:40:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 12:40:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 12:40:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 12:40:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 12:40:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:40:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:40:11,415 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:40:11,415 INFO L283 CfgBuilder]: Removed 9 assume(true) statements. [2019-09-07 12:40:11,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:40:11 BoogieIcfgContainer [2019-09-07 12:40:11,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:40:11,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:40:11,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:40:11,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:40:11,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:40:10" (1/3) ... [2019-09-07 12:40:11,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df379cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:40:11, skipping insertion in model container [2019-09-07 12:40:11,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:40:11" (2/3) ... [2019-09-07 12:40:11,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df379cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:40:11, skipping insertion in model container [2019-09-07 12:40:11,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:40:11" (3/3) ... [2019-09-07 12:40:11,423 INFO L109 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2019-09-07 12:40:11,430 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:40:11,437 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:40:11,453 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:40:11,480 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:40:11,481 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:40:11,481 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:40:11,481 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:40:11,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:40:11,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:40:11,481 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:40:11,482 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:40:11,482 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:40:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-09-07 12:40:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 12:40:11,502 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:11,503 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:11,505 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:11,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1187401570, now seen corresponding path program 1 times [2019-09-07 12:40:11,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:11,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:11,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:11,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:11,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:11,593 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:11,594 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:11,594 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:11,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:40:11,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2019-09-07 12:40:11,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:40:11,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:40:11,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 12:40:11,688 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 12:40:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 12:40:11,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:40:11,702 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2019-09-07 12:40:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:11,741 INFO L93 Difference]: Finished difference Result 70 states and 109 transitions. [2019-09-07 12:40:11,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 12:40:11,742 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-07 12:40:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:11,754 INFO L225 Difference]: With dead ends: 70 [2019-09-07 12:40:11,754 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 12:40:11,762 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:40:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 12:40:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-07 12:40:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 12:40:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-09-07 12:40:11,825 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2019-09-07 12:40:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:11,826 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-09-07 12:40:11,827 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 12:40:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-09-07 12:40:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 12:40:11,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:11,829 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:11,829 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash -738632508, now seen corresponding path program 1 times [2019-09-07 12:40:11,831 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:11,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:11,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:11,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:11,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:11,854 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:11,854 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:11,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 12:40:11,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:40:11,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:40:11,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:40:11,967 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:40:11,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:40:11,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:40:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:40:11,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:40:11,971 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2019-09-07 12:40:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:12,043 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2019-09-07 12:40:12,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:40:12,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-09-07 12:40:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:12,045 INFO L225 Difference]: With dead ends: 60 [2019-09-07 12:40:12,047 INFO L226 Difference]: Without dead ends: 38 [2019-09-07 12:40:12,048 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:40:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-07 12:40:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-09-07 12:40:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-07 12:40:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-09-07 12:40:12,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-09-07 12:40:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:12,060 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-09-07 12:40:12,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:40:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-09-07 12:40:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 12:40:12,062 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:12,062 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:12,062 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:12,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1951122805, now seen corresponding path program 1 times [2019-09-07 12:40:12,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:12,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:12,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:12,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,071 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:12,071 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:12,072 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:12,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:40:12,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:40:12,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:40:12,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:40:12,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 12:40:12,154 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:40:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:40:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:40:12,155 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-09-07 12:40:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:12,257 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2019-09-07 12:40:12,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:40:12,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-09-07 12:40:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:12,260 INFO L225 Difference]: With dead ends: 77 [2019-09-07 12:40:12,261 INFO L226 Difference]: Without dead ends: 50 [2019-09-07 12:40:12,261 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:40:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-07 12:40:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-09-07 12:40:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 12:40:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-09-07 12:40:12,274 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2019-09-07 12:40:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:12,274 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-09-07 12:40:12,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:40:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-09-07 12:40:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 12:40:12,276 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:12,276 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:12,276 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:12,277 INFO L82 PathProgramCache]: Analyzing trace with hash 271293506, now seen corresponding path program 1 times [2019-09-07 12:40:12,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:12,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:12,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:12,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,285 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:12,285 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:12,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 12:40:12,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:40:12,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:40:12,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:40:12,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:40:12,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 12:40:12,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:40:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:40:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:40:12,355 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 4 states. [2019-09-07 12:40:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:12,434 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-09-07 12:40:12,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:40:12,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-09-07 12:40:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:12,437 INFO L225 Difference]: With dead ends: 77 [2019-09-07 12:40:12,437 INFO L226 Difference]: Without dead ends: 47 [2019-09-07 12:40:12,438 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:40:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-07 12:40:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-09-07 12:40:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 12:40:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-09-07 12:40:12,448 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2019-09-07 12:40:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:12,448 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-09-07 12:40:12,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:40:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-09-07 12:40:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-07 12:40:12,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:12,450 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:12,450 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2014780548, now seen corresponding path program 1 times [2019-09-07 12:40:12,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:12,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,482 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:12,482 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:12,483 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:12,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:40:12,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:40:12,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:40:12,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:40:12,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:40:12,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:40:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:40:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:40:12,576 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2019-09-07 12:40:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:12,703 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-09-07 12:40:12,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:40:12,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-07 12:40:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:12,704 INFO L225 Difference]: With dead ends: 87 [2019-09-07 12:40:12,705 INFO L226 Difference]: Without dead ends: 54 [2019-09-07 12:40:12,705 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:40:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-07 12:40:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-09-07 12:40:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 12:40:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-09-07 12:40:12,714 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 24 [2019-09-07 12:40:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:12,715 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-09-07 12:40:12,715 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:40:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-09-07 12:40:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 12:40:12,716 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:12,716 INFO L399 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, 1, 1] [2019-09-07 12:40:12,716 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash 131367810, now seen corresponding path program 2 times [2019-09-07 12:40:12,717 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:12,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:12,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:12,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,727 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:12,730 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:12,730 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:12,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:40:12,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-07 12:40:12,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:40:12,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:40:12,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-07 12:40:12,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:40:12,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 12:40:12,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:40:12,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:40:12,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:40:12,793 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 4 states. [2019-09-07 12:40:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:12,871 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2019-09-07 12:40:12,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:40:12,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-09-07 12:40:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:12,872 INFO L225 Difference]: With dead ends: 97 [2019-09-07 12:40:12,873 INFO L226 Difference]: Without dead ends: 78 [2019-09-07 12:40:12,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:40:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-07 12:40:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2019-09-07 12:40:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 12:40:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2019-09-07 12:40:12,883 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 25 [2019-09-07 12:40:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:12,883 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2019-09-07 12:40:12,883 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:40:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2019-09-07 12:40:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 12:40:12,885 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:12,885 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:12,885 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1605521934, now seen corresponding path program 1 times [2019-09-07 12:40:12,886 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:12,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:12,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:40:12,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:12,892 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:12,892 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:12,893 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 12:40:12,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:40:12,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:40:12,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-07 12:40:12,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:40:12,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 12:40:12,978 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:40:12,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:40:12,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:40:12,979 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2019-09-07 12:40:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:13,088 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2019-09-07 12:40:13,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:40:13,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-09-07 12:40:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:13,090 INFO L225 Difference]: With dead ends: 101 [2019-09-07 12:40:13,090 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 12:40:13,093 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:40:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 12:40:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-09-07 12:40:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 12:40:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2019-09-07 12:40:13,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2019-09-07 12:40:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:13,117 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2019-09-07 12:40:13,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:40:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2019-09-07 12:40:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-07 12:40:13,119 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:13,119 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:13,120 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash -675781077, now seen corresponding path program 2 times [2019-09-07 12:40:13,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:13,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:13,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:13,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,132 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:13,132 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:13,133 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 12:40:13,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:13,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:40:13,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:40:13,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:40:13,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-07 12:40:13,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:40:13,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 12:40:13,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 12:40:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 12:40:13,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:40:13,248 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 7 states. [2019-09-07 12:40:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:13,376 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2019-09-07 12:40:13,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 12:40:13,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2019-09-07 12:40:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:13,378 INFO L225 Difference]: With dead ends: 115 [2019-09-07 12:40:13,378 INFO L226 Difference]: Without dead ends: 67 [2019-09-07 12:40:13,379 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:40:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-07 12:40:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-09-07 12:40:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-07 12:40:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2019-09-07 12:40:13,403 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 41 [2019-09-07 12:40:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:13,405 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2019-09-07 12:40:13,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 12:40:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2019-09-07 12:40:13,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 12:40:13,407 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:13,407 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:13,410 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1399380910, now seen corresponding path program 3 times [2019-09-07 12:40:13,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:13,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:13,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:40:13,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,422 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:13,422 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:13,423 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:13,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:40:13,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 12:40:13,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:40:13,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:40:13,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-09-07 12:40:13,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:40:13,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:40:13,534 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:40:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:40:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:40:13,535 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 5 states. [2019-09-07 12:40:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:13,622 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2019-09-07 12:40:13,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:40:13,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-09-07 12:40:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:13,623 INFO L225 Difference]: With dead ends: 197 [2019-09-07 12:40:13,624 INFO L226 Difference]: Without dead ends: 152 [2019-09-07 12:40:13,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:40:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-09-07 12:40:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-09-07 12:40:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-07 12:40:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2019-09-07 12:40:13,640 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2019-09-07 12:40:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:13,640 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2019-09-07 12:40:13,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:40:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2019-09-07 12:40:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-07 12:40:13,641 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:13,642 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:13,642 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1340791648, now seen corresponding path program 4 times [2019-09-07 12:40:13,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:13,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:13,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:40:13,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,649 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:13,649 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:13,649 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:13,671 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:40:13,709 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:40:13,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:40:13,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:40:13,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:13,802 INFO L341 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2019-09-07 12:40:13,803 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 10 [2019-09-07 12:40:13,805 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:40:13,807 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:40:13,807 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:40:13,807 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:27, output treesize:3 [2019-09-07 12:40:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:40:13,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:40:13,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-07 12:40:13,835 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:40:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:40:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:40:13,836 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 6 states. [2019-09-07 12:40:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:13,941 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2019-09-07 12:40:13,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:40:13,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-09-07 12:40:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:13,946 INFO L225 Difference]: With dead ends: 180 [2019-09-07 12:40:13,946 INFO L226 Difference]: Without dead ends: 120 [2019-09-07 12:40:13,950 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:40:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-07 12:40:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2019-09-07 12:40:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-07 12:40:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-09-07 12:40:13,979 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 73 [2019-09-07 12:40:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:13,979 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-09-07 12:40:13,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:40:13,979 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-09-07 12:40:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-07 12:40:13,983 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:13,983 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:13,983 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1588938142, now seen corresponding path program 1 times [2019-09-07 12:40:13,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:13,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:13,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:40:13,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:13,998 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:13,998 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:13,998 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:14,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:40:14,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:40:14,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 12:40:14,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:40:14,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-07 12:40:14,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 12:40:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 12:40:14,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:40:14,158 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 8 states. [2019-09-07 12:40:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:14,303 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2019-09-07 12:40:14,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 12:40:14,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2019-09-07 12:40:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:14,304 INFO L225 Difference]: With dead ends: 194 [2019-09-07 12:40:14,304 INFO L226 Difference]: Without dead ends: 110 [2019-09-07 12:40:14,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:40:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-07 12:40:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2019-09-07 12:40:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-07 12:40:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2019-09-07 12:40:14,318 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 73 [2019-09-07 12:40:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:14,319 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2019-09-07 12:40:14,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 12:40:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2019-09-07 12:40:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 12:40:14,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:14,321 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:14,321 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash 373177058, now seen corresponding path program 2 times [2019-09-07 12:40:14,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:14,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:14,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:14,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:40:14,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:14,329 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:14,329 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:14,329 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:14,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:40:14,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:40:14,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:40:14,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:40:14,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-09-07 12:40:14,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:40:14,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 12:40:14,487 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:40:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:40:14,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:40:14,489 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 9 states. [2019-09-07 12:40:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:14,626 INFO L93 Difference]: Finished difference Result 216 states and 279 transitions. [2019-09-07 12:40:14,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 12:40:14,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2019-09-07 12:40:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:14,627 INFO L225 Difference]: With dead ends: 216 [2019-09-07 12:40:14,627 INFO L226 Difference]: Without dead ends: 121 [2019-09-07 12:40:14,628 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:40:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-07 12:40:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2019-09-07 12:40:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-07 12:40:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2019-09-07 12:40:14,641 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 81 [2019-09-07 12:40:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:14,642 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2019-09-07 12:40:14,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:40:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2019-09-07 12:40:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-07 12:40:14,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:14,643 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:14,643 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:14,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1259869406, now seen corresponding path program 3 times [2019-09-07 12:40:14,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:14,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:14,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:14,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:40:14,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:14,652 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:14,652 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:14,652 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 12:40:14,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:15,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-07 12:40:15,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:40:15,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:40:15,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:40:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:40:15,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:40:15,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-07 12:40:15,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 12:40:15,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 12:40:15,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 12:40:15,302 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 10 states. [2019-09-07 12:40:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:40:15,444 INFO L93 Difference]: Finished difference Result 238 states and 307 transitions. [2019-09-07 12:40:15,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 12:40:15,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2019-09-07 12:40:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:40:15,446 INFO L225 Difference]: With dead ends: 238 [2019-09-07 12:40:15,446 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 12:40:15,447 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 12:40:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 12:40:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2019-09-07 12:40:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 12:40:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2019-09-07 12:40:15,463 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 89 [2019-09-07 12:40:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:40:15,463 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2019-09-07 12:40:15,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 12:40:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2019-09-07 12:40:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 12:40:15,464 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:40:15,464 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:40:15,465 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:40:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:40:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2135024862, now seen corresponding path program 4 times [2019-09-07 12:40:15,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:40:15,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:40:15,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:15,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:40:15,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:40:15,477 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:40:15,478 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:40:15,478 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:40:15,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:40:15,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:40:15,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:40:15,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2019-09-07 12:40:15,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:42:20,033 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-09-07 12:43:09,703 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-09-07 12:44:03,492 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-09-07 12:45:13,797 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-09-07 12:46:25,013 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-09-07 12:46:25,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:46:25,215 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:581) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1428) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:631) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 39 more [2019-09-07 12:46:25,222 INFO L168 Benchmark]: Toolchain (without parser) took 374528.86 ms. Allocated memory was 133.7 MB in the beginning and 304.1 MB in the end (delta: 170.4 MB). Free memory was 89.9 MB in the beginning and 233.0 MB in the end (delta: -143.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2019-09-07 12:46:25,223 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 108.1 MB in the beginning and 107.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-09-07 12:46:25,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.69 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 89.7 MB in the beginning and 180.2 MB in the end (delta: -90.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2019-09-07 12:46:25,227 INFO L168 Benchmark]: Boogie Preprocessor took 44.23 ms. Allocated memory is still 200.8 MB. Free memory was 180.2 MB in the beginning and 175.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. [2019-09-07 12:46:25,228 INFO L168 Benchmark]: RCFGBuilder took 366.91 ms. Allocated memory is still 200.8 MB. Free memory was 175.8 MB in the beginning and 157.5 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2019-09-07 12:46:25,232 INFO L168 Benchmark]: TraceAbstraction took 373802.56 ms. Allocated memory was 200.8 MB in the beginning and 304.1 MB in the end (delta: 103.3 MB). Free memory was 157.5 MB in the beginning and 233.0 MB in the end (delta: -75.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2019-09-07 12:46:25,238 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 108.1 MB in the beginning and 107.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.69 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 89.7 MB in the beginning and 180.2 MB in the end (delta: -90.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.23 ms. Allocated memory is still 200.8 MB. Free memory was 180.2 MB in the beginning and 175.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 366.91 ms. Allocated memory is still 200.8 MB. Free memory was 175.8 MB in the beginning and 157.5 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 373802.56 ms. Allocated memory was 200.8 MB in the beginning and 304.1 MB in the end (delta: 103.3 MB). Free memory was 157.5 MB in the beginning and 233.0 MB in the end (delta: -75.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...