java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 23:56:19,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 23:56:19,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 23:56:19,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 23:56:19,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 23:56:19,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 23:56:19,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 23:56:19,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 23:56:19,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 23:56:19,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 23:56:19,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 23:56:19,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 23:56:19,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 23:56:19,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 23:56:19,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 23:56:19,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 23:56:19,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 23:56:19,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 23:56:19,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 23:56:19,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 23:56:19,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 23:56:19,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 23:56:19,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 23:56:19,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 23:56:19,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 23:56:19,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 23:56:19,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 23:56:19,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 23:56:19,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-01 23:56:19,901 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 23:56:19,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 23:56:19,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 23:56:19,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 23:56:19,903 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 23:56:19,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 23:56:19,903 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 23:56:19,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 23:56:19,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 23:56:19,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 23:56:19,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 23:56:19,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 23:56:19,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 23:56:19,905 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 23:56:19,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 23:56:19,905 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 23:56:19,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 23:56:19,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 23:56:19,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 23:56:19,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 23:56:19,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 23:56:19,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:56:19,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 23:56:19,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 23:56:19,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 23:56:19,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 23:56:19,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 23:56:19,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 23:56:19,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 23:56:19,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 23:56:19,947 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 23:56:19,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 23:56:19,952 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 23:56:19,952 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 23:56:19,953 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-10-01 23:56:20,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dc171f5/94ab7deba43b45b4a0b7b8ce90d68903/FLAG1bd38a5b1 [2019-10-01 23:56:20,476 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 23:56:20,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-10-01 23:56:20,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dc171f5/94ab7deba43b45b4a0b7b8ce90d68903/FLAG1bd38a5b1 [2019-10-01 23:56:20,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dc171f5/94ab7deba43b45b4a0b7b8ce90d68903 [2019-10-01 23:56:20,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 23:56:20,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 23:56:20,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 23:56:20,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 23:56:20,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 23:56:20,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:56:20" (1/1) ... [2019-10-01 23:56:20,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6133dc55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:20, skipping insertion in model container [2019-10-01 23:56:20,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:56:20" (1/1) ... [2019-10-01 23:56:20,861 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 23:56:20,877 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 23:56:21,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:56:21,060 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 23:56:21,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:56:21,208 INFO L192 MainTranslator]: Completed translation [2019-10-01 23:56:21,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21 WrapperNode [2019-10-01 23:56:21,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 23:56:21,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 23:56:21,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 23:56:21,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 23:56:21,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... [2019-10-01 23:56:21,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... [2019-10-01 23:56:21,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... [2019-10-01 23:56:21,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... [2019-10-01 23:56:21,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... [2019-10-01 23:56:21,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... [2019-10-01 23:56:21,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... [2019-10-01 23:56:21,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 23:56:21,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 23:56:21,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 23:56:21,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 23:56:21,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:56:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 23:56:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 23:56:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 23:56:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 23:56:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 23:56:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 23:56:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-01 23:56:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 23:56:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 23:56:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 23:56:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 23:56:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 23:56:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 23:56:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 23:56:21,627 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 23:56:21,628 INFO L283 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-01 23:56:21,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:56:21 BoogieIcfgContainer [2019-10-01 23:56:21,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 23:56:21,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 23:56:21,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 23:56:21,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 23:56:21,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 11:56:20" (1/3) ... [2019-10-01 23:56:21,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11304181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:56:21, skipping insertion in model container [2019-10-01 23:56:21,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:56:21" (2/3) ... [2019-10-01 23:56:21,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11304181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:56:21, skipping insertion in model container [2019-10-01 23:56:21,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:56:21" (3/3) ... [2019-10-01 23:56:21,640 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2019-10-01 23:56:21,654 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 23:56:21,675 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 23:56:21,706 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 23:56:21,732 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 23:56:21,733 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 23:56:21,733 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 23:56:21,733 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 23:56:21,733 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 23:56:21,734 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 23:56:21,734 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 23:56:21,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 23:56:21,734 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 23:56:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-10-01 23:56:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 23:56:21,756 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:21,756 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:21,758 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-10-01 23:56:21,764 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:21,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:21,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:21,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:21,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:21,846 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:21,846 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:21,846 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:21,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:56:21,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-01 23:56:21,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:56:21,934 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:56:21,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 23:56:21,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 23:56:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 23:56:21,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:56:21,952 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-10-01 23:56:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:21,979 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-10-01 23:56:21,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 23:56:21,980 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-01 23:56:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:21,988 INFO L225 Difference]: With dead ends: 66 [2019-10-01 23:56:21,988 INFO L226 Difference]: Without dead ends: 31 [2019-10-01 23:56:21,992 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:56:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-01 23:56:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-01 23:56:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-01 23:56:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-10-01 23:56:22,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-10-01 23:56:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:22,035 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-10-01 23:56:22,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 23:56:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-10-01 23:56:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 23:56:22,037 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:22,037 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:22,037 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:22,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-10-01 23:56:22,038 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:22,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:22,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:22,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,049 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:22,049 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:22,050 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:22,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:56:22,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:56:22,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:56:22,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:56:22,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:56:22,169 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:56:22,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:56:22,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:56:22,170 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 3 states. [2019-10-01 23:56:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:22,233 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-10-01 23:56:22,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:56:22,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-01 23:56:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:22,235 INFO L225 Difference]: With dead ends: 56 [2019-10-01 23:56:22,235 INFO L226 Difference]: Without dead ends: 36 [2019-10-01 23:56:22,237 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:56:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-01 23:56:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-10-01 23:56:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-01 23:56:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-01 23:56:22,244 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-10-01 23:56:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:22,245 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-01 23:56:22,245 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:56:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-01 23:56:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-01 23:56:22,246 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:22,246 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:22,246 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2133227694, now seen corresponding path program 1 times [2019-10-01 23:56:22,247 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:22,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:22,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:22,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,255 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:22,256 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:22,256 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-01 23:56:22,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:56:22,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:56:22,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:56:22,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:56:22,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:56:22,330 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:56:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:56:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:56:22,331 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-01 23:56:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:22,438 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2019-10-01 23:56:22,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:56:22,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-01 23:56:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:22,442 INFO L225 Difference]: With dead ends: 71 [2019-10-01 23:56:22,442 INFO L226 Difference]: Without dead ends: 46 [2019-10-01 23:56:22,443 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:56:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-01 23:56:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-10-01 23:56:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-01 23:56:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-10-01 23:56:22,456 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-10-01 23:56:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:22,457 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-10-01 23:56:22,457 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:56:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-10-01 23:56:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 23:56:22,458 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:22,458 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:22,458 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1108398309, now seen corresponding path program 1 times [2019-10-01 23:56:22,459 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:22,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,468 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:22,468 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:22,468 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:22,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:56:22,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:56:22,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:56:22,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:56:22,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:56:22,551 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:56:22,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:56:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:56:22,552 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 4 states. [2019-10-01 23:56:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:22,647 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-01 23:56:22,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:56:22,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-01 23:56:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:22,649 INFO L225 Difference]: With dead ends: 71 [2019-10-01 23:56:22,649 INFO L226 Difference]: Without dead ends: 43 [2019-10-01 23:56:22,649 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:56:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-01 23:56:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-10-01 23:56:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-01 23:56:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-01 23:56:22,659 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2019-10-01 23:56:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:22,659 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-01 23:56:22,659 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:56:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-01 23:56:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-01 23:56:22,660 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:22,660 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:22,661 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:22,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1602833213, now seen corresponding path program 1 times [2019-10-01 23:56:22,661 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:22,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:22,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:22,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,670 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:22,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:22,670 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-01 23:56:22,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:56:22,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:56:22,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:56:22,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:56:22,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:56:22,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:56:22,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:56:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:56:22,766 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-10-01 23:56:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:22,857 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-01 23:56:22,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:56:22,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-01 23:56:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:22,858 INFO L225 Difference]: With dead ends: 79 [2019-10-01 23:56:22,859 INFO L226 Difference]: Without dead ends: 48 [2019-10-01 23:56:22,859 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:56:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-01 23:56:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-01 23:56:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-01 23:56:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-01 23:56:22,868 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2019-10-01 23:56:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:22,868 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-01 23:56:22,868 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:56:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-01 23:56:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-01 23:56:22,869 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:22,870 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:22,870 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:22,870 INFO L82 PathProgramCache]: Analyzing trace with hash 249553947, now seen corresponding path program 2 times [2019-10-01 23:56:22,870 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:22,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:22,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:22,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:22,877 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:22,878 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:22,878 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:22,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:56:22,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-01 23:56:22,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:56:22,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:56:22,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 23:56:22,978 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:56:22,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:56:22,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:56:22,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:56:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:56:22,980 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-10-01 23:56:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:23,062 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2019-10-01 23:56:23,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:56:23,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-01 23:56:23,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:23,064 INFO L225 Difference]: With dead ends: 89 [2019-10-01 23:56:23,064 INFO L226 Difference]: Without dead ends: 70 [2019-10-01 23:56:23,065 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:56:23,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-01 23:56:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2019-10-01 23:56:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-01 23:56:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-01 23:56:23,074 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-10-01 23:56:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:23,074 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-01 23:56:23,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:56:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-01 23:56:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-01 23:56:23,076 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:23,076 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:23,076 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1698801625, now seen corresponding path program 1 times [2019-10-01 23:56:23,077 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:23,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:23,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:56:23,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,085 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:23,086 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:23,086 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:23,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:56:23,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:56:23,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 23:56:23,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:56:23,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-01 23:56:23,213 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:56:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:56:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:56:23,214 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-10-01 23:56:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:23,303 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2019-10-01 23:56:23,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:56:23,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-01 23:56:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:23,305 INFO L225 Difference]: With dead ends: 89 [2019-10-01 23:56:23,305 INFO L226 Difference]: Without dead ends: 52 [2019-10-01 23:56:23,306 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:56:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-01 23:56:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-01 23:56:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-01 23:56:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2019-10-01 23:56:23,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2019-10-01 23:56:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:23,315 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2019-10-01 23:56:23,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:56:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2019-10-01 23:56:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-01 23:56:23,317 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:23,317 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:23,317 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash -602786922, now seen corresponding path program 2 times [2019-10-01 23:56:23,318 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:23,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:23,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:56:23,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,325 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:23,325 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:23,325 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:23,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:56:23,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:56:23,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:56:23,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 23:56:23,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-01 23:56:23,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:56:23,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-01 23:56:23,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 23:56:23,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 23:56:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:56:23,441 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2019-10-01 23:56:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:23,561 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2019-10-01 23:56:23,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 23:56:23,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-01 23:56:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:23,563 INFO L225 Difference]: With dead ends: 99 [2019-10-01 23:56:23,563 INFO L226 Difference]: Without dead ends: 57 [2019-10-01 23:56:23,564 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:56:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-01 23:56:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-10-01 23:56:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-01 23:56:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-01 23:56:23,576 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 35 [2019-10-01 23:56:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:23,576 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-01 23:56:23,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 23:56:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-01 23:56:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-01 23:56:23,577 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:23,578 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:23,578 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash -119527047, now seen corresponding path program 3 times [2019-10-01 23:56:23,579 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:23,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:23,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:56:23,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,597 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:23,597 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:23,597 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:23,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:56:23,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-01 23:56:23,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:56:23,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:56:23,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-01 23:56:23,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:56:23,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:56:23,721 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:56:23,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:56:23,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:56:23,722 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 5 states. [2019-10-01 23:56:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:23,820 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2019-10-01 23:56:23,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:56:23,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-01 23:56:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:23,823 INFO L225 Difference]: With dead ends: 165 [2019-10-01 23:56:23,823 INFO L226 Difference]: Without dead ends: 128 [2019-10-01 23:56:23,823 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:56:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-01 23:56:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2019-10-01 23:56:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-01 23:56:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-10-01 23:56:23,850 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 37 [2019-10-01 23:56:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:23,851 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-10-01 23:56:23,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:56:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-10-01 23:56:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-01 23:56:23,854 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:23,855 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:23,855 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1459343723, now seen corresponding path program 4 times [2019-10-01 23:56:23,855 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:23,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:23,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:56:23,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:23,873 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:23,873 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:23,873 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:56:23,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:56:23,965 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:56:23,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:56:23,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:56:23,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:56:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-01 23:56:24,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:56:24,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:56:24,006 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:56:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:56:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:56:24,007 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 5 states. [2019-10-01 23:56:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:56:24,109 INFO L93 Difference]: Finished difference Result 215 states and 266 transitions. [2019-10-01 23:56:24,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:56:24,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-01 23:56:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:56:24,111 INFO L225 Difference]: With dead ends: 215 [2019-10-01 23:56:24,111 INFO L226 Difference]: Without dead ends: 156 [2019-10-01 23:56:24,112 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:56:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-10-01 23:56:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2019-10-01 23:56:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-01 23:56:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2019-10-01 23:56:24,132 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 57 [2019-10-01 23:56:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:56:24,132 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2019-10-01 23:56:24,132 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:56:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2019-10-01 23:56:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-01 23:56:24,133 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:56:24,134 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:56:24,134 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:56:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:56:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -371257155, now seen corresponding path program 5 times [2019-10-01 23:56:24,134 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:56:24,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:56:24,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:24,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:56:24,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:56:24,143 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:56:24,143 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:56:24,143 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-01 23:56:24,172 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true