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/copy-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:37,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:37,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:37,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:37,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:37,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:37,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:37,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:37,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:37,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:37,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:37,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:37,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:37,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:37,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:37,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:37,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:37,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:37,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:37,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:37,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:37,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:37,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:37,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:37,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:59:37,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:59:37,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:59:37,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:59:37,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:59:37,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:59:37,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:59:37,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:59:37,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:59:37,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:37,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:37,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:37,713 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 [2019-09-20 12:59:37,727 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:37,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:37,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:37,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:37,729 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:37,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:37,730 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:37,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:37,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:37,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:37,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:37,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:37,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:37,731 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:37,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:37,731 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:37,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:37,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:37,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:37,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:37,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:37,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:37,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:37,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:37,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:37,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:37,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:37,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:37,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:37,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:37,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:37,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:37,798 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:37,798 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:37,799 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-09-20 12:59:37,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e60897f/bd813ef5ed5e4ba590f87db94720e068/FLAGcae5f2d4b [2019-09-20 12:59:38,331 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:38,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-09-20 12:59:38,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e60897f/bd813ef5ed5e4ba590f87db94720e068/FLAGcae5f2d4b [2019-09-20 12:59:38,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e60897f/bd813ef5ed5e4ba590f87db94720e068 [2019-09-20 12:59:38,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:38,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:38,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:38,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:38,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:38,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:38" (1/1) ... [2019-09-20 12:59:38,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f6b6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:38, skipping insertion in model container [2019-09-20 12:59:38,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:38" (1/1) ... [2019-09-20 12:59:38,761 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:38,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:38,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:38,995 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:39,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:39,132 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:39,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39 WrapperNode [2019-09-20 12:59:39,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:39,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:39,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:39,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:39,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (1/1) ... [2019-09-20 12:59:39,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (1/1) ... [2019-09-20 12:59:39,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (1/1) ... [2019-09-20 12:59:39,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (1/1) ... [2019-09-20 12:59:39,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (1/1) ... [2019-09-20 12:59:39,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (1/1) ... [2019-09-20 12:59:39,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (1/1) ... [2019-09-20 12:59:39,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:39,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:39,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:39,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:39,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (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 [2019-09-20 12:59:39,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:39,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:59:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:59:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:59:39,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:59:39,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:59:39,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:59:39,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:39,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:39,525 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:39,525 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-09-20 12:59:39,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:39 BoogieIcfgContainer [2019-09-20 12:59:39,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:39,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:39,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:39,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:39,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:38" (1/3) ... [2019-09-20 12:59:39,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42039d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:39, skipping insertion in model container [2019-09-20 12:59:39,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:39" (2/3) ... [2019-09-20 12:59:39,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42039d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:39, skipping insertion in model container [2019-09-20 12:59:39,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:39" (3/3) ... [2019-09-20 12:59:39,534 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2019-09-20 12:59:39,550 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:39,566 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:39,585 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:39,623 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:39,624 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:39,624 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:39,624 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:39,624 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:39,624 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:39,625 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:39,625 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:39,625 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-09-20 12:59:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 12:59:39,647 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:39,648 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:39,650 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1035913628, now seen corresponding path program 1 times [2019-09-20 12:59:39,658 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:39,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:39,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:39,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:39,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:39,751 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:39,751 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:39,751 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:39,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:39,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:39,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:39,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:39,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:59:39,890 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:59:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:59:39,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:39,903 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-09-20 12:59:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:39,997 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-09-20 12:59:39,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:39,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-20 12:59:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:40,009 INFO L225 Difference]: With dead ends: 57 [2019-09-20 12:59:40,009 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 12:59:40,013 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 12:59:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-09-20 12:59:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-20 12:59:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-09-20 12:59:40,052 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-09-20 12:59:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:40,052 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-09-20 12:59:40,052 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:59:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-09-20 12:59:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-20 12:59:40,054 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:40,054 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:40,054 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 573516244, now seen corresponding path program 1 times [2019-09-20 12:59:40,055 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:40,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:40,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:40,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,066 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:40,067 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:40,068 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:40,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:40,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:40,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:40,157 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:40,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 12:59:40,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 12:59:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 12:59:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:40,163 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-09-20 12:59:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:40,260 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2019-09-20 12:59:40,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 12:59:40,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-09-20 12:59:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:40,264 INFO L225 Difference]: With dead ends: 53 [2019-09-20 12:59:40,264 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 12:59:40,266 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 12:59:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-09-20 12:59:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 12:59:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-09-20 12:59:40,279 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2019-09-20 12:59:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:40,279 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-09-20 12:59:40,279 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 12:59:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-09-20 12:59:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:59:40,282 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:40,282 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:40,282 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1173975853, now seen corresponding path program 1 times [2019-09-20 12:59:40,283 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:40,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:40,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:40,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,300 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:40,300 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:40,300 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:40,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:40,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:40,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:40,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:40,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-20 12:59:40,443 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:59:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:59:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:40,444 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-09-20 12:59:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:40,569 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2019-09-20 12:59:40,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:40,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-20 12:59:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:40,571 INFO L225 Difference]: With dead ends: 61 [2019-09-20 12:59:40,571 INFO L226 Difference]: Without dead ends: 39 [2019-09-20 12:59:40,572 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-20 12:59:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-09-20 12:59:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-20 12:59:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-09-20 12:59:40,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2019-09-20 12:59:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:40,582 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-09-20 12:59:40,582 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:59:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-09-20 12:59:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-20 12:59:40,583 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:40,584 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:40,584 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash 488343988, now seen corresponding path program 2 times [2019-09-20 12:59:40,585 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:40,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:40,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:40,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,594 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:40,595 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:40,595 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:40,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:40,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-20 12:59:40,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:40,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:40,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:59:40,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:40,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 12:59:40,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 12:59:40,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 12:59:40,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:40,694 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-09-20 12:59:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:40,802 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-09-20 12:59:40,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 12:59:40,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-09-20 12:59:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:40,804 INFO L225 Difference]: With dead ends: 68 [2019-09-20 12:59:40,804 INFO L226 Difference]: Without dead ends: 52 [2019-09-20 12:59:40,805 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-20 12:59:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2019-09-20 12:59:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-20 12:59:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-09-20 12:59:40,816 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2019-09-20 12:59:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:40,816 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-09-20 12:59:40,816 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 12:59:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-09-20 12:59:40,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:59:40,818 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:40,818 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:40,818 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:40,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1641208904, now seen corresponding path program 1 times [2019-09-20 12:59:40,819 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:40,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:40,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:40,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:40,827 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:40,827 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:40,827 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:40,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:40,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 12:59:40,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:59:40,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:40,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-20 12:59:40,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:59:40,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:59:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:40,936 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2019-09-20 12:59:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:41,046 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-09-20 12:59:41,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:59:41,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-09-20 12:59:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:41,047 INFO L225 Difference]: With dead ends: 71 [2019-09-20 12:59:41,047 INFO L226 Difference]: Without dead ends: 43 [2019-09-20 12:59:41,048 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-20 12:59:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-09-20 12:59:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-20 12:59:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-09-20 12:59:41,057 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2019-09-20 12:59:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:41,057 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-09-20 12:59:41,058 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:59:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-09-20 12:59:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 12:59:41,059 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:41,059 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:41,059 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:41,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1483393922, now seen corresponding path program 2 times [2019-09-20 12:59:41,060 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:41,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:41,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:41,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:41,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:41,068 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:41,069 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:41,069 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-20 12:59:41,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:41,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:41,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:41,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:41,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-20 12:59:41,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:41,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-20 12:59:41,169 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:59:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:59:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:41,170 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2019-09-20 12:59:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:41,284 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2019-09-20 12:59:41,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:41,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-20 12:59:41,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:41,286 INFO L225 Difference]: With dead ends: 113 [2019-09-20 12:59:41,286 INFO L226 Difference]: Without dead ends: 86 [2019-09-20 12:59:41,287 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-20 12:59:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2019-09-20 12:59:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-20 12:59:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-09-20 12:59:41,299 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 28 [2019-09-20 12:59:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:41,299 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-09-20 12:59:41,299 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:59:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-09-20 12:59:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-20 12:59:41,300 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:41,301 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:41,301 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash -347991136, now seen corresponding path program 3 times [2019-09-20 12:59:41,302 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:41,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:41,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:41,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:41,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:41,310 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 12:59:41,310 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 12:59:41,310 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 12:59:41,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:41,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-20 12:59:41,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:41,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-20 12:59:41,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:41,488 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-09-20 12:59:41,489 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,501 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,502 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-09-20 12:59:41,560 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-20 12:59:41,560 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,574 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,575 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,576 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:14 [2019-09-20 12:59:41,647 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2019-09-20 12:59:41,648 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,668 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,668 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,669 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2019-09-20 12:59:41,714 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,716 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,719 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 64 [2019-09-20 12:59:41,720 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,743 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,744 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:74 [2019-09-20 12:59:41,796 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,797 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,798 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,800 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,801 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,802 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,805 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 57 [2019-09-20 12:59:41,807 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,824 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,825 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,826 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2019-09-20 12:59:41,901 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,903 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,906 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,907 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,908 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,909 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,981 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,982 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 272 [2019-09-20 12:59:41,985 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:42,064 INFO L567 ElimStorePlain]: treesize reduction 278, result has 24.7 percent of original size [2019-09-20 12:59:42,065 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 12:59:42,066 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:95, output treesize:91 [2019-09-20 12:59:42,154 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,155 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,156 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,157 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,159 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,160 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,294 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-09-20 12:59:42,295 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:42,295 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 108 treesize of output 519 [2019-09-20 12:59:42,301 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:42,420 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2019-09-20 12:59:42,421 INFO L567 ElimStorePlain]: treesize reduction 646, result has 16.4 percent of original size [2019-09-20 12:59:42,423 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-09-20 12:59:42,423 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:131, output treesize:127 [2019-09-20 12:59:42,544 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,546 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,548 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,552 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,553 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,554 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:42,699 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-09-20 12:59:42,700 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:42,702 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 108 treesize of output 519 [2019-09-20 12:59:42,711 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:42,844 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2019-09-20 12:59:42,845 INFO L567 ElimStorePlain]: treesize reduction 646, result has 16.4 percent of original size [2019-09-20 12:59:42,846 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-09-20 12:59:42,847 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:131, output treesize:127 [2019-09-20 12:59:53,657 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:53,659 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:53,661 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:53,663 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2019-09-20 12:59:53,664 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:53,676 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:53,677 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:53,677 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:3 [2019-09-20 12:59:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-20 12:59:53,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:53,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-20 12:59:53,761 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-20 12:59:53,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-20 12:59:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=267, Unknown=5, NotChecked=0, Total=342 [2019-09-20 12:59:53,768 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 19 states. [2019-09-20 13:00:14,857 WARN L191 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 52