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/nla-digbench/hard.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:19:00,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:19:00,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:19:00,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:19:00,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:19:00,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:19:00,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:19:00,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:19:00,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:19:00,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:19:00,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:19:00,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:19:00,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:19:00,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:19:00,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:19:00,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:19:00,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:19:00,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:19:00,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:19:00,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:19:00,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:19:00,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:19:00,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:19:00,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:19:00,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:19:00,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:19:00,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:19:00,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:19:00,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:19:00,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:19:00,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:19:00,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:19:00,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:19:00,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:19:00,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:19:00,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:19:00,675 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 [2019-09-03 20:19:00,689 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:19:00,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:19:00,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:19:00,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:19:00,691 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:19:00,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:19:00,691 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:19:00,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:19:00,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:19:00,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:19:00,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:19:00,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:19:00,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:19:00,693 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:19:00,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:19:00,693 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:19:00,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:19:00,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:19:00,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:19:00,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:19:00,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:19:00,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:19:00,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:19:00,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:19:00,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:19:00,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:19:00,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:19:00,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:19:00,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:19:00,723 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:19:00,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:19:00,738 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:19:00,740 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:19:00,740 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:19:00,741 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard.c [2019-09-03 20:19:00,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52636ffbe/85878f6709ed4a068291e75f0cff75c7/FLAGc0e3851c5 [2019-09-03 20:19:01,246 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:19:01,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard.c [2019-09-03 20:19:01,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52636ffbe/85878f6709ed4a068291e75f0cff75c7/FLAGc0e3851c5 [2019-09-03 20:19:01,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52636ffbe/85878f6709ed4a068291e75f0cff75c7 [2019-09-03 20:19:01,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:19:01,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:19:01,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:19:01,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:19:01,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:19:01,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335c662c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01, skipping insertion in model container [2019-09-03 20:19:01,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,666 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:19:01,684 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:19:01,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:19:01,833 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:19:01,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:19:01,868 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:19:01,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01 WrapperNode [2019-09-03 20:19:01,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:19:01,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:19:01,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:19:01,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:19:01,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (1/1) ... [2019-09-03 20:19:01,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:19:01,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:19:01,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:19:01,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:19:01,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (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 [2019-09-03 20:19:02,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:19:02,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:19:02,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:19:02,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:19:02,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:19:02,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:19:02,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:19:02,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:19:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:19:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:19:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:19:02,248 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:19:02,248 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-03 20:19:02,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:19:02 BoogieIcfgContainer [2019-09-03 20:19:02,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:19:02,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:19:02,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:19:02,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:19:02,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:19:01" (1/3) ... [2019-09-03 20:19:02,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7b04e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:19:02, skipping insertion in model container [2019-09-03 20:19:02,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:19:01" (2/3) ... [2019-09-03 20:19:02,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7b04e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:19:02, skipping insertion in model container [2019-09-03 20:19:02,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:19:02" (3/3) ... [2019-09-03 20:19:02,273 INFO L109 eAbstractionObserver]: Analyzing ICFG hard.c [2019-09-03 20:19:02,286 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:19:02,295 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:19:02,329 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:19:02,365 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:19:02,366 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:19:02,366 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:19:02,366 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:19:02,367 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:19:02,367 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:19:02,367 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:19:02,367 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:19:02,367 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:19:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-09-03 20:19:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:19:02,388 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:02,389 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:02,391 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1301090018, now seen corresponding path program 1 times [2019-09-03 20:19:02,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:02,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:02,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:02,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:02,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:19:02,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:19:02,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:19:02,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:19:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:19:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:19:02,596 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-09-03 20:19:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:02,694 INFO L93 Difference]: Finished difference Result 65 states and 110 transitions. [2019-09-03 20:19:02,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:19:02,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:19:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:02,704 INFO L225 Difference]: With dead ends: 65 [2019-09-03 20:19:02,704 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 20:19:02,708 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:19:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 20:19:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-09-03 20:19:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 20:19:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2019-09-03 20:19:02,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2019-09-03 20:19:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:02,749 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2019-09-03 20:19:02,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:19:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2019-09-03 20:19:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 20:19:02,751 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:02,751 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:02,751 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1931384136, now seen corresponding path program 1 times [2019-09-03 20:19:02,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:02,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:02,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:02,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:02,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:19:02,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:19:02,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:19:02,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:19:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:19:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:19:02,817 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2019-09-03 20:19:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:02,889 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2019-09-03 20:19:02,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:19:02,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-03 20:19:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:02,891 INFO L225 Difference]: With dead ends: 40 [2019-09-03 20:19:02,892 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:19:02,893 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:19:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:19:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-09-03 20:19:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 20:19:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-09-03 20:19:02,903 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2019-09-03 20:19:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:02,904 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-09-03 20:19:02,904 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:19:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-09-03 20:19:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 20:19:02,905 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:02,905 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:02,906 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2005010146, now seen corresponding path program 1 times [2019-09-03 20:19:02,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:02,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:02,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:02,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:02,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:02,919 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:02,920 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:02,920 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) [2019-09-03 20:19:02,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:02,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:19:02,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:19:03,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:19:03,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:19:03,076 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:19:03,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:19:03,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:19:03,077 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-09-03 20:19:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:03,185 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2019-09-03 20:19:03,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:19:03,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-03 20:19:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:03,187 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:19:03,187 INFO L226 Difference]: Without dead ends: 45 [2019-09-03 20:19:03,188 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:19:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-03 20:19:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-03 20:19:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 20:19:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2019-09-03 20:19:03,200 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2019-09-03 20:19:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:03,200 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2019-09-03 20:19:03,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:19:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2019-09-03 20:19:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-03 20:19:03,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:03,202 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:03,202 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:03,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1231057051, now seen corresponding path program 1 times [2019-09-03 20:19:03,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:03,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:03,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:03,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:03,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:03,213 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:03,213 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:03,213 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:03,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:03,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:19:03,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:19:03,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:19:03,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:19:03,311 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:19:03,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:19:03,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:19:03,312 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 5 states. [2019-09-03 20:19:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:03,396 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-09-03 20:19:03,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:19:03,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-09-03 20:19:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:03,399 INFO L225 Difference]: With dead ends: 58 [2019-09-03 20:19:03,399 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:19:03,399 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:19:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:19:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-09-03 20:19:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 20:19:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2019-09-03 20:19:03,412 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2019-09-03 20:19:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:03,412 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2019-09-03 20:19:03,412 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:19:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2019-09-03 20:19:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:19:03,414 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:03,414 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:03,415 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2079143466, now seen corresponding path program 1 times [2019-09-03 20:19:03,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:03,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:03,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:03,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:03,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:03,425 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:03,425 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:03,426 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 [2019-09-03 20:19:03,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:03,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:19:03,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:19:03,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:03,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 20:19:03,556 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:19:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:19:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:19:03,557 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 6 states. [2019-09-03 20:19:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:03,692 INFO L93 Difference]: Finished difference Result 98 states and 134 transitions. [2019-09-03 20:19:03,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:19:03,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-09-03 20:19:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:03,695 INFO L225 Difference]: With dead ends: 98 [2019-09-03 20:19:03,696 INFO L226 Difference]: Without dead ends: 69 [2019-09-03 20:19:03,697 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:19:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-03 20:19:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-03 20:19:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-03 20:19:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2019-09-03 20:19:03,710 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 37 [2019-09-03 20:19:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:03,711 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2019-09-03 20:19:03,711 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:19:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2019-09-03 20:19:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-03 20:19:03,713 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:03,713 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:03,713 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:03,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1938980894, now seen corresponding path program 2 times [2019-09-03 20:19:03,714 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:03,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:03,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:03,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:03,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:03,723 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:03,723 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:03,723 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) [2019-09-03 20:19:03,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:03,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:19:03,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:03,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:19:03,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-03 20:19:03,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:03,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:19:03,878 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:19:03,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:19:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:19:03,881 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 7 states. [2019-09-03 20:19:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:04,093 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2019-09-03 20:19:04,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:19:04,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-09-03 20:19:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:04,097 INFO L225 Difference]: With dead ends: 127 [2019-09-03 20:19:04,097 INFO L226 Difference]: Without dead ends: 98 [2019-09-03 20:19:04,098 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:19:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-03 20:19:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-09-03 20:19:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 20:19:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2019-09-03 20:19:04,115 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 54 [2019-09-03 20:19:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:04,116 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2019-09-03 20:19:04,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:19:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2019-09-03 20:19:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-03 20:19:04,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:04,118 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:04,119 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1940610566, now seen corresponding path program 1 times [2019-09-03 20:19:04,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:04,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:04,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:04,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:04,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:04,128 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:04,128 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:04,128 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) [2019-09-03 20:19:04,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:04,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:19:04,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-03 20:19:04,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:04,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:19:04,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:19:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:19:04,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:19:04,291 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand 7 states. [2019-09-03 20:19:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:04,464 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2019-09-03 20:19:04,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:19:04,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2019-09-03 20:19:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:04,466 INFO L225 Difference]: With dead ends: 120 [2019-09-03 20:19:04,466 INFO L226 Difference]: Without dead ends: 118 [2019-09-03 20:19:04,467 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:19:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-03 20:19:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2019-09-03 20:19:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-03 20:19:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2019-09-03 20:19:04,488 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 57 [2019-09-03 20:19:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:04,491 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2019-09-03 20:19:04,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:19:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2019-09-03 20:19:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-03 20:19:04,497 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:04,497 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2019-09-03 20:19:04,498 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:04,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2101027601, now seen corresponding path program 1 times [2019-09-03 20:19:04,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:04,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:04,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:04,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:04,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:04,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:04,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:04,517 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 [2019-09-03 20:19:04,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:04,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 20:19:04,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2019-09-03 20:19:04,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:04,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:19:04,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:19:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:19:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:19:04,645 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand 7 states. [2019-09-03 20:19:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:04,776 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2019-09-03 20:19:04,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:19:04,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2019-09-03 20:19:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:04,778 INFO L225 Difference]: With dead ends: 134 [2019-09-03 20:19:04,778 INFO L226 Difference]: Without dead ends: 109 [2019-09-03 20:19:04,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:19:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-03 20:19:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-09-03 20:19:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-03 20:19:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2019-09-03 20:19:04,792 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 68 [2019-09-03 20:19:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:04,793 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2019-09-03 20:19:04,793 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:19:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2019-09-03 20:19:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-03 20:19:04,795 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:04,795 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:04,795 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:04,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1849875754, now seen corresponding path program 3 times [2019-09-03 20:19:04,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:04,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:04,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:04,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:04,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:04,803 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:04,803 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:04,804 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) [2019-09-03 20:19:04,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:04,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 20:19:04,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:04,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:19:04,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:07,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 67 proven. 7 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-09-03 20:19:11,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:11,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:19:11,269 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:19:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:19:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=66, Unknown=2, NotChecked=0, Total=90 [2019-09-03 20:19:11,270 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand 10 states. [2019-09-03 20:19:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:12,186 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2019-09-03 20:19:12,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:19:12,187 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2019-09-03 20:19:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:12,189 INFO L225 Difference]: With dead ends: 143 [2019-09-03 20:19:12,190 INFO L226 Difference]: Without dead ends: 131 [2019-09-03 20:19:12,190 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=33, Invalid=97, Unknown=2, NotChecked=0, Total=132 [2019-09-03 20:19:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-03 20:19:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2019-09-03 20:19:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-03 20:19:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 159 transitions. [2019-09-03 20:19:12,215 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 159 transitions. Word has length 71 [2019-09-03 20:19:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:12,216 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 159 transitions. [2019-09-03 20:19:12,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:19:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 159 transitions. [2019-09-03 20:19:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-03 20:19:12,219 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:12,219 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:12,220 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:12,220 INFO L82 PathProgramCache]: Analyzing trace with hash -147251122, now seen corresponding path program 2 times [2019-09-03 20:19:12,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:12,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:12,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:12,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:12,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:12,245 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:12,246 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:12,246 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:12,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:19:12,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:19:12,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:12,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 20:19:12,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:19:12,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:12,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:19:12,427 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:19:12,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:19:12,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:19:12,428 INFO L87 Difference]: Start difference. First operand 126 states and 159 transitions. Second operand 8 states. [2019-09-03 20:19:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:12,706 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2019-09-03 20:19:12,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:19:12,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2019-09-03 20:19:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:12,708 INFO L225 Difference]: With dead ends: 153 [2019-09-03 20:19:12,708 INFO L226 Difference]: Without dead ends: 151 [2019-09-03 20:19:12,709 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:19:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-03 20:19:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2019-09-03 20:19:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-03 20:19:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2019-09-03 20:19:12,725 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 74 [2019-09-03 20:19:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:12,726 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2019-09-03 20:19:12,726 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:19:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2019-09-03 20:19:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-03 20:19:12,728 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:12,728 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:12,728 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411909, now seen corresponding path program 3 times [2019-09-03 20:19:12,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:12,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:12,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:12,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:12,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:12,737 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:12,737 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:12,737 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) [2019-09-03 20:19:12,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:14,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:19:14,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:14,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-03 20:19:14,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:14,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:19:14,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:14,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:19:14,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:19:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:19:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:19:14,840 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand 10 states. [2019-09-03 20:19:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:15,129 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2019-09-03 20:19:15,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:19:15,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2019-09-03 20:19:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:15,131 INFO L225 Difference]: With dead ends: 161 [2019-09-03 20:19:15,131 INFO L226 Difference]: Without dead ends: 150 [2019-09-03 20:19:15,132 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:19:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-03 20:19:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2019-09-03 20:19:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-09-03 20:19:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 176 transitions. [2019-09-03 20:19:15,144 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 176 transitions. Word has length 87 [2019-09-03 20:19:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:15,145 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 176 transitions. [2019-09-03 20:19:15,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:19:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 176 transitions. [2019-09-03 20:19:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-03 20:19:15,146 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:15,146 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:15,146 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash -464531833, now seen corresponding path program 1 times [2019-09-03 20:19:15,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:15,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:15,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:15,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:15,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:15,154 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:15,154 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:15,154 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 [2019-09-03 20:19:15,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:15,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:19:15,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:15,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:15,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2019-09-03 20:19:15,845 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:19:15,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 20:19:15,845 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:19:15,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:19:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:19:15,846 INFO L87 Difference]: Start difference. First operand 150 states and 176 transitions. Second operand 6 states. [2019-09-03 20:19:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:15,988 INFO L93 Difference]: Finished difference Result 193 states and 225 transitions. [2019-09-03 20:19:15,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:19:15,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-09-03 20:19:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:15,990 INFO L225 Difference]: With dead ends: 193 [2019-09-03 20:19:15,990 INFO L226 Difference]: Without dead ends: 139 [2019-09-03 20:19:15,991 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:19:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-03 20:19:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2019-09-03 20:19:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-03 20:19:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2019-09-03 20:19:16,005 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 87 [2019-09-03 20:19:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:16,005 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2019-09-03 20:19:16,005 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:19:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2019-09-03 20:19:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:19:16,006 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:16,007 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:16,007 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 900675334, now seen corresponding path program 4 times [2019-09-03 20:19:16,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:16,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:16,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:16,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:16,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:16,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:16,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:16,027 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) [2019-09-03 20:19:16,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:16,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:19:16,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:16,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 20:19:16,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:18,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:18,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:18,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:18,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:18,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:18,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:20,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 55 proven. 104 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:19:23,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:23,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:19:23,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:19:23,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:19:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=156, Unknown=3, NotChecked=0, Total=210 [2019-09-03 20:19:23,241 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 15 states. [2019-09-03 20:19:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:25,968 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2019-09-03 20:19:25,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:19:25,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 91 [2019-09-03 20:19:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:25,971 INFO L225 Difference]: With dead ends: 148 [2019-09-03 20:19:25,971 INFO L226 Difference]: Without dead ends: 146 [2019-09-03 20:19:25,972 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=62, Invalid=207, Unknown=3, NotChecked=0, Total=272 [2019-09-03 20:19:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-03 20:19:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2019-09-03 20:19:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-03 20:19:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2019-09-03 20:19:25,986 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 91 [2019-09-03 20:19:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:25,987 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2019-09-03 20:19:25,987 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:19:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2019-09-03 20:19:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-03 20:19:25,988 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:25,989 INFO L399 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:25,989 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:25,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1784958798, now seen corresponding path program 2 times [2019-09-03 20:19:25,990 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:25,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:25,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:25,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:25,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:25,997 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:25,997 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:25,997 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) [2019-09-03 20:19:26,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:26,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:19:26,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:26,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjunts are in the unsatisfiable core [2019-09-03 20:19:26,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:26,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-09-03 20:19:26,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:26,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:19:26,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:19:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:19:26,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:19:26,373 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand 14 states. [2019-09-03 20:19:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:26,732 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2019-09-03 20:19:26,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:19:26,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2019-09-03 20:19:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:26,734 INFO L225 Difference]: With dead ends: 150 [2019-09-03 20:19:26,734 INFO L226 Difference]: Without dead ends: 109 [2019-09-03 20:19:26,734 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:19:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-03 20:19:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-03 20:19:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-03 20:19:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2019-09-03 20:19:26,748 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 98 [2019-09-03 20:19:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:26,748 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2019-09-03 20:19:26,748 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:19:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2019-09-03 20:19:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-03 20:19:26,750 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:26,750 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:26,751 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash 553754445, now seen corresponding path program 5 times [2019-09-03 20:19:26,751 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:26,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:26,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:26,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:26,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:26,771 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:26,771 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:26,771 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) [2019-09-03 20:19:26,793 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:26,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-03 20:19:26,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:26,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-03 20:19:26,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:27,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 102 proven. 53 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-09-03 20:19:27,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:27,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:19:27,200 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:19:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:19:27,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:19:27,200 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 15 states. [2019-09-03 20:19:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:27,735 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2019-09-03 20:19:27,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:19:27,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2019-09-03 20:19:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:27,737 INFO L225 Difference]: With dead ends: 176 [2019-09-03 20:19:27,738 INFO L226 Difference]: Without dead ends: 163 [2019-09-03 20:19:27,739 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:19:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-03 20:19:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2019-09-03 20:19:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-03 20:19:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2019-09-03 20:19:27,754 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 104 [2019-09-03 20:19:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:27,756 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2019-09-03 20:19:27,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:19:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2019-09-03 20:19:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-03 20:19:27,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:27,758 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:27,758 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:27,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1121618217, now seen corresponding path program 6 times [2019-09-03 20:19:27,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:27,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:27,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:27,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:27,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:27,776 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:27,776 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:27,776 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 [2019-09-03 20:19:27,803 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:19:28,133 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-03 20:19:28,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:28,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-03 20:19:28,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 48 proven. 75 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-09-03 20:19:28,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:28,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:19:28,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:19:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:19:28,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:19:28,275 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand 10 states. [2019-09-03 20:19:28,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:28,596 INFO L93 Difference]: Finished difference Result 215 states and 256 transitions. [2019-09-03 20:19:28,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:19:28,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2019-09-03 20:19:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:28,599 INFO L225 Difference]: With dead ends: 215 [2019-09-03 20:19:28,599 INFO L226 Difference]: Without dead ends: 183 [2019-09-03 20:19:28,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:19:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-03 20:19:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2019-09-03 20:19:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-09-03 20:19:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 202 transitions. [2019-09-03 20:19:28,620 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 202 transitions. Word has length 109 [2019-09-03 20:19:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:28,623 INFO L475 AbstractCegarLoop]: Abstraction has 179 states and 202 transitions. [2019-09-03 20:19:28,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:19:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 202 transitions. [2019-09-03 20:19:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-03 20:19:28,625 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:28,625 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:28,625 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:28,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1767580262, now seen corresponding path program 7 times [2019-09-03 20:19:28,626 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:28,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:28,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:28,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:28,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:28,643 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:28,643 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:28,643 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:28,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:19:28,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2019-09-03 20:19:28,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:28,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-09-03 20:19:29,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:29,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:19:29,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:19:29,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:19:29,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:19:29,008 INFO L87 Difference]: Start difference. First operand 179 states and 202 transitions. Second operand 13 states. [2019-09-03 20:19:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:29,451 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2019-09-03 20:19:29,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:19:29,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 117 [2019-09-03 20:19:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:29,454 INFO L225 Difference]: With dead ends: 197 [2019-09-03 20:19:29,454 INFO L226 Difference]: Without dead ends: 190 [2019-09-03 20:19:29,455 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:19:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-09-03 20:19:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2019-09-03 20:19:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-09-03 20:19:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 207 transitions. [2019-09-03 20:19:29,468 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 207 transitions. Word has length 117 [2019-09-03 20:19:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:29,469 INFO L475 AbstractCegarLoop]: Abstraction has 187 states and 207 transitions. [2019-09-03 20:19:29,469 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:19:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 207 transitions. [2019-09-03 20:19:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-03 20:19:29,470 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:29,471 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:29,471 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash 78636520, now seen corresponding path program 2 times [2019-09-03 20:19:29,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:29,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:29,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:29,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:19:29,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:29,477 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:29,477 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:29,477 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:29,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:19:29,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:19:29,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:29,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-03 20:19:29,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:29,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-09-03 20:19:29,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:29,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:19:29,903 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:19:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:19:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:19:29,904 INFO L87 Difference]: Start difference. First operand 187 states and 207 transitions. Second operand 14 states. [2019-09-03 20:19:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:30,374 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2019-09-03 20:19:30,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:19:30,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2019-09-03 20:19:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:30,377 INFO L225 Difference]: With dead ends: 207 [2019-09-03 20:19:30,377 INFO L226 Difference]: Without dead ends: 192 [2019-09-03 20:19:30,378 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:19:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-09-03 20:19:30,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 176. [2019-09-03 20:19:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-09-03 20:19:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 193 transitions. [2019-09-03 20:19:30,391 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 193 transitions. Word has length 117 [2019-09-03 20:19:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:30,391 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 193 transitions. [2019-09-03 20:19:30,391 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:19:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 193 transitions. [2019-09-03 20:19:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-03 20:19:30,393 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:30,393 INFO L399 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:30,393 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:30,394 INFO L82 PathProgramCache]: Analyzing trace with hash 897393669, now seen corresponding path program 8 times [2019-09-03 20:19:30,394 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:30,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:30,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:30,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:30,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:30,399 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:30,399 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:30,399 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:30,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:19:30,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:19:30,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:30,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 49 conjunts are in the unsatisfiable core [2019-09-03 20:19:30,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:30,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 38 proven. 59 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2019-09-03 20:19:30,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:30,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:19:30,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:19:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:19:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:19:30,717 INFO L87 Difference]: Start difference. First operand 176 states and 193 transitions. Second operand 12 states. [2019-09-03 20:19:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:19:31,151 INFO L93 Difference]: Finished difference Result 243 states and 272 transitions. [2019-09-03 20:19:31,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:19:31,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 121 [2019-09-03 20:19:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:19:31,153 INFO L225 Difference]: With dead ends: 243 [2019-09-03 20:19:31,153 INFO L226 Difference]: Without dead ends: 230 [2019-09-03 20:19:31,154 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:19:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-09-03 20:19:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2019-09-03 20:19:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-09-03 20:19:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 253 transitions. [2019-09-03 20:19:31,176 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 253 transitions. Word has length 121 [2019-09-03 20:19:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:19:31,177 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 253 transitions. [2019-09-03 20:19:31,177 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:19:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 253 transitions. [2019-09-03 20:19:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-03 20:19:31,180 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:19:31,180 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:19:31,180 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:19:31,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:19:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1022179185, now seen corresponding path program 9 times [2019-09-03 20:19:31,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:19:31,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:19:31,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:31,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:19:31,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:19:31,196 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:19:31,197 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:19:31,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:19:31,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:19:31,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-03 20:19:31,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:19:31,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 49 conjunts are in the unsatisfiable core [2019-09-03 20:19:31,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:19:33,405 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2019-09-03 20:19:37,464 WARN L188 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 25 [2019-09-03 20:19:37,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:37,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:37,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:37,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:37,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:37,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:41,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:41,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:50,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:19:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 167 proven. 37 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2019-09-03 20:19:50,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:19:50,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:19:50,104 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:19:50,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:19:50,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=144, Unknown=23, NotChecked=0, Total=210 [2019-09-03 20:19:50,105 INFO L87 Difference]: Start difference. First operand 228 states and 253 transitions. Second operand 15 states. [2019-09-03 20:20:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:27,303 INFO L93 Difference]: Finished difference Result 261 states and 297 transitions. [2019-09-03 20:20:27,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:20:27,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 126 [2019-09-03 20:20:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:27,306 INFO L225 Difference]: With dead ends: 261 [2019-09-03 20:20:27,306 INFO L226 Difference]: Without dead ends: 249 [2019-09-03 20:20:27,307 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=54, Invalid=195, Unknown=23, NotChecked=0, Total=272 [2019-09-03 20:20:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-09-03 20:20:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2019-09-03 20:20:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-09-03 20:20:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 270 transitions. [2019-09-03 20:20:27,327 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 270 transitions. Word has length 126 [2019-09-03 20:20:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:27,329 INFO L475 AbstractCegarLoop]: Abstraction has 241 states and 270 transitions. [2019-09-03 20:20:27,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:20:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 270 transitions. [2019-09-03 20:20:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-03 20:20:27,332 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:27,332 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:27,332 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1499914929, now seen corresponding path program 3 times [2019-09-03 20:20:27,333 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:27,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:27,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:27,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,343 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:27,344 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:27,344 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:27,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:27,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:20:27,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:27,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:20:27,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 149 proven. 5 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-03 20:20:27,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:27,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:20:27,520 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:20:27,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:20:27,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:20:27,521 INFO L87 Difference]: Start difference. First operand 241 states and 270 transitions. Second operand 10 states. [2019-09-03 20:20:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:27,804 INFO L93 Difference]: Finished difference Result 265 states and 290 transitions. [2019-09-03 20:20:27,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:20:27,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 128 [2019-09-03 20:20:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:27,807 INFO L225 Difference]: With dead ends: 265 [2019-09-03 20:20:27,807 INFO L226 Difference]: Without dead ends: 209 [2019-09-03 20:20:27,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:20:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-03 20:20:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2019-09-03 20:20:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-09-03 20:20:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2019-09-03 20:20:27,830 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 128 [2019-09-03 20:20:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:27,830 INFO L475 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2019-09-03 20:20:27,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:20:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2019-09-03 20:20:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-03 20:20:27,832 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:27,832 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:27,832 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1746864302, now seen corresponding path program 10 times [2019-09-03 20:20:27,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:27,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:27,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:27,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:27,847 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:27,847 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:27,847 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:27,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:27,928 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:20:27,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:27,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 74 conjunts are in the unsatisfiable core [2019-09-03 20:20:27,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:29,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:29,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:53,073 WARN L188 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2019-09-03 20:20:57,646 WARN L188 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2019-09-03 20:20:59,720 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 58 [2019-09-03 20:21:00,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:00,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:40,059 WARN L188 SmtUtils]: Spent 16.67 s on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-09-03 20:22:07,107 WARN L188 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2019-09-03 20:22:07,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 165 proven. 188 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2019-09-03 20:22:07,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:07,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:22:07,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:22:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:22:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=286, Unknown=29, NotChecked=0, Total=380 [2019-09-03 20:22:07,391 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand 20 states. [2019-09-03 20:26:34,072 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-09-03 20:26:34,073 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) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:660) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:712) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:625) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:467) 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: java.io.IOException: Broken pipe at java.io.FileOutputStream.writeBytes(Native Method) at java.io.FileOutputStream.write(FileOutputStream.java:326) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-09-03 20:26:34,081 INFO L168 Benchmark]: Toolchain (without parser) took 452428.17 ms. Allocated memory was 140.5 MB in the beginning and 362.8 MB in the end (delta: 222.3 MB). Free memory was 87.7 MB in the beginning and 206.5 MB in the end (delta: -118.8 MB). Peak memory consumption was 103.5 MB. Max. memory is 7.1 GB. [2019-09-03 20:26:34,082 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:26:34,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.90 ms. Allocated memory is still 140.5 MB. Free memory was 87.5 MB in the beginning and 77.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:26:34,083 INFO L168 Benchmark]: Boogie Preprocessor took 121.60 ms. Allocated memory was 140.5 MB in the beginning and 199.8 MB in the end (delta: 59.2 MB). Free memory was 77.4 MB in the beginning and 177.3 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2019-09-03 20:26:34,084 INFO L168 Benchmark]: RCFGBuilder took 259.50 ms. Allocated memory is still 199.8 MB. Free memory was 177.3 MB in the beginning and 165.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:26:34,087 INFO L168 Benchmark]: TraceAbstraction took 451825.74 ms. Allocated memory was 199.8 MB in the beginning and 362.8 MB in the end (delta: 163.1 MB). Free memory was 164.9 MB in the beginning and 206.5 MB in the end (delta: -41.6 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. [2019-09-03 20:26:34,091 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 216.90 ms. Allocated memory is still 140.5 MB. Free memory was 87.5 MB in the beginning and 77.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.60 ms. Allocated memory was 140.5 MB in the beginning and 199.8 MB in the end (delta: 59.2 MB). Free memory was 77.4 MB in the beginning and 177.3 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.50 ms. Allocated memory is still 199.8 MB. Free memory was 177.3 MB in the beginning and 165.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 451825.74 ms. Allocated memory was 199.8 MB in the beginning and 362.8 MB in the end (delta: 163.1 MB). Free memory was 164.9 MB in the beginning and 206.5 MB in the end (delta: -41.6 MB). Peak memory consumption was 121.5 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) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...