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/ps6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:30:38,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:30:38,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:30:38,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 03:30:38,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 03:30:38,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 03:30:38,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 03:30:38,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 03:30:38,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 03:30:38,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 03:30:38,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 03:30:38,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 03:30:38,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 03:30:38,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 03:30:38,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 03:30:38,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 03:30:38,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 03:30:38,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 03:30:38,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 03:30:38,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 03:30:38,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 03:30:38,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 03:30:38,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 03:30:38,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 03:30:38,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 03:30:38,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:30:38,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:30:38,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:30:38,228 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 [2019-09-08 03:30:38,241 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:30:38,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:30:38,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:30:38,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:30:38,243 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:30:38,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:30:38,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:30:38,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:30:38,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:30:38,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:30:38,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:30:38,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:30:38,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:30:38,245 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:30:38,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:30:38,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:30:38,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:30:38,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:30:38,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:30:38,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:30:38,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:30:38,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:30:38,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:30:38,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:30:38,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:30:38,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:30:38,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:30:38,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:30:38,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:30:38,282 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:30:38,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:30:38,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:30:38,304 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:30:38,305 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:30:38,305 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6.c [2019-09-08 03:30:38,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b495306a4/33926865459241e4b6f1d2d87b3cff8d/FLAG985f69726 [2019-09-08 03:30:38,828 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:30:38,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6.c [2019-09-08 03:30:38,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b495306a4/33926865459241e4b6f1d2d87b3cff8d/FLAG985f69726 [2019-09-08 03:30:39,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b495306a4/33926865459241e4b6f1d2d87b3cff8d [2019-09-08 03:30:39,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:30:39,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:30:39,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:30:39,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:30:39,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:30:39,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e8664d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39, skipping insertion in model container [2019-09-08 03:30:39,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,298 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:30:39,314 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:30:39,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:30:39,532 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:30:39,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:30:39,589 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:30:39,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39 WrapperNode [2019-09-08 03:30:39,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:30:39,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:30:39,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:30:39,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:30:39,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... [2019-09-08 03:30:39,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:30:39,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:30:39,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:30:39,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:30:39,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:30:39,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:30:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:30:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 03:30:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:30:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:30:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 03:30:39,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-08 03:30:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:30:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:30:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:30:39,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:30:39,970 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:30:39,970 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 03:30:39,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:30:39 BoogieIcfgContainer [2019-09-08 03:30:39,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:30:39,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:30:39,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:30:39,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:30:39,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:30:39" (1/3) ... [2019-09-08 03:30:39,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35df8a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:30:39, skipping insertion in model container [2019-09-08 03:30:39,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:30:39" (2/3) ... [2019-09-08 03:30:39,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35df8a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:30:39, skipping insertion in model container [2019-09-08 03:30:39,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:30:39" (3/3) ... [2019-09-08 03:30:39,978 INFO L109 eAbstractionObserver]: Analyzing ICFG ps6.c [2019-09-08 03:30:39,987 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:30:39,994 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:30:40,010 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:30:40,035 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:30:40,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:30:40,036 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:30:40,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:30:40,036 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:30:40,036 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:30:40,036 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:30:40,036 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:30:40,037 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:30:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-08 03:30:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:30:40,054 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:40,055 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:40,057 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:40,061 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-08 03:30:40,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:40,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:40,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:40,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:40,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:30:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:30:40,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:30:40,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-08 03:30:40,162 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-08 03:30:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-08 03:30:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:30:40,174 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-08 03:30:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:40,192 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-09-08 03:30:40,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-08 03:30:40,194 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-08 03:30:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:40,201 INFO L225 Difference]: With dead ends: 37 [2019-09-08 03:30:40,201 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 03:30:40,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:30:40,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 03:30:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-08 03:30:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-08 03:30:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-08 03:30:40,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-08 03:30:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:40,243 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-08 03:30:40,243 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-08 03:30:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-08 03:30:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:30:40,245 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:40,245 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:40,245 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:40,246 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-08 03:30:40,246 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:40,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:40,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:40,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:40,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:40,253 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:40,253 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:40,253 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:30:40,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:30:40,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 03:30:40,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:30:40,368 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:30:40,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 03:30:40,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 03:30:40,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 03:30:40,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 03:30:40,371 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-08 03:30:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:40,653 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-08 03:30:40,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 03:30:40,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-08 03:30:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:40,655 INFO L225 Difference]: With dead ends: 27 [2019-09-08 03:30:40,655 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 03:30:40,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:30:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 03:30:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 03:30:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 03:30:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-08 03:30:40,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-08 03:30:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:40,666 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-08 03:30:40,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 03:30:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-08 03:30:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-08 03:30:40,667 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:40,668 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:40,668 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-08 03:30:40,669 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:40,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:40,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:40,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:40,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:40,675 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:40,675 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:40,675 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 [2019-09-08 03:30:40,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:30:40,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 03:30:40,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:30:40,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:40,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-08 03:30:40,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 03:30:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 03:30:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:30:40,798 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-08 03:30:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:41,066 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-08 03:30:41,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 03:30:41,067 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-08 03:30:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:41,068 INFO L225 Difference]: With dead ends: 34 [2019-09-08 03:30:41,068 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 03:30:41,069 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:30:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 03:30:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-08 03:30:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-08 03:30:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-08 03:30:41,080 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-09-08 03:30:41,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:41,081 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-08 03:30:41,081 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 03:30:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-08 03:30:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-08 03:30:41,082 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:41,082 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:41,083 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:41,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-09-08 03:30:41,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:41,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:41,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:41,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:41,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:41,100 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:41,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:41,101 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 [2019-09-08 03:30:41,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:30:41,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:30:41,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:41,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-08 03:30:41,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 03:30:41,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:41,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-08 03:30:41,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 03:30:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 03:30:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:30:41,274 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-09-08 03:30:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:41,455 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-08 03:30:41,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:30:41,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-08 03:30:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:41,457 INFO L225 Difference]: With dead ends: 43 [2019-09-08 03:30:41,458 INFO L226 Difference]: Without dead ends: 41 [2019-09-08 03:30:41,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:30:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-08 03:30:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-09-08 03:30:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 03:30:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-09-08 03:30:41,477 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-09-08 03:30:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:41,478 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-09-08 03:30:41,478 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 03:30:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-09-08 03:30:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 03:30:41,480 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:41,480 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:41,480 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:41,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-09-08 03:30:41,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:41,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:41,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:41,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:30:41,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:41,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:41,493 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:41,493 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:30:41,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:30:41,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-08 03:30:41,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:41,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 03:30:41,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:41,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-08 03:30:41,673 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:30:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:30:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:30:41,675 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2019-09-08 03:30:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:42,056 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-09-08 03:30:42,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:30:42,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-09-08 03:30:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:42,060 INFO L225 Difference]: With dead ends: 46 [2019-09-08 03:30:42,060 INFO L226 Difference]: Without dead ends: 38 [2019-09-08 03:30:42,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:30:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-08 03:30:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-08 03:30:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-08 03:30:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-08 03:30:42,070 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-09-08 03:30:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:42,070 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-08 03:30:42,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:30:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-08 03:30:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 03:30:42,071 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:42,072 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:42,072 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-09-08 03:30:42,072 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:42,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:42,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:42,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:42,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:42,077 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:42,077 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:42,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:30:42,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:30:42,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-08 03:30:42,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:42,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:30:42,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:46,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:30:46,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:46,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-08 03:30:46,936 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 03:30:46,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 03:30:46,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=39, Unknown=2, NotChecked=0, Total=56 [2019-09-08 03:30:46,937 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2019-09-08 03:30:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:50,557 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-09-08 03:30:50,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 03:30:50,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-08 03:30:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:50,559 INFO L225 Difference]: With dead ends: 44 [2019-09-08 03:30:50,559 INFO L226 Difference]: Without dead ends: 40 [2019-09-08 03:30:50,559 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2019-09-08 03:30:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-08 03:30:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-09-08 03:30:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 03:30:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-09-08 03:30:50,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2019-09-08 03:30:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:50,572 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-09-08 03:30:50,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 03:30:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-09-08 03:30:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-08 03:30:50,573 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:50,573 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:50,573 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-09-08 03:30:50,573 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:50,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:50,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:50,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:30:50,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:50,587 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:50,587 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:50,588 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 [2019-09-08 03:30:50,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:30:50,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:30:50,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:50,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-08 03:30:50,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:50,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-08 03:30:50,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:50,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-08 03:30:50,823 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:30:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:30:50,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:30:50,824 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2019-09-08 03:30:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:51,181 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-09-08 03:30:51,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 03:30:51,181 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-09-08 03:30:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:51,183 INFO L225 Difference]: With dead ends: 45 [2019-09-08 03:30:51,183 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 03:30:51,183 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:30:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 03:30:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 03:30:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 03:30:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-09-08 03:30:51,194 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2019-09-08 03:30:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:51,194 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-09-08 03:30:51,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:30:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-09-08 03:30:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-08 03:30:51,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:51,196 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:51,196 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:51,196 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-09-08 03:30:51,197 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:51,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:51,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:51,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:30:51,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:51,202 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:51,202 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:51,202 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:30:51,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:30:51,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 03:30:51,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:51,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 03:30:51,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:51,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-08 03:30:51,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:51,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-08 03:30:51,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 03:30:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 03:30:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:30:51,493 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 12 states. [2019-09-08 03:30:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:51,729 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-09-08 03:30:51,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 03:30:51,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-09-08 03:30:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:51,731 INFO L225 Difference]: With dead ends: 48 [2019-09-08 03:30:51,731 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 03:30:51,733 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:30:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 03:30:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 03:30:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 03:30:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-09-08 03:30:51,757 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 42 [2019-09-08 03:30:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:51,757 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-09-08 03:30:51,757 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 03:30:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-09-08 03:30:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 03:30:51,766 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:51,766 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:51,766 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:51,767 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-09-08 03:30:51,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:51,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:51,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:51,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:30:51,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:51,774 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:51,774 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:51,775 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 [2019-09-08 03:30:51,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:30:51,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:30:51,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:51,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 03:30:51,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:51,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-08 03:30:51,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:51,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-08 03:30:51,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 03:30:51,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 03:30:51,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:30:51,954 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2019-09-08 03:30:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:52,197 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2019-09-08 03:30:52,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 03:30:52,198 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-09-08 03:30:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:52,199 INFO L225 Difference]: With dead ends: 51 [2019-09-08 03:30:52,199 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 03:30:52,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:30:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 03:30:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 03:30:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 03:30:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-09-08 03:30:52,211 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 49 [2019-09-08 03:30:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:52,212 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-09-08 03:30:52,212 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 03:30:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-09-08 03:30:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-08 03:30:52,213 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:52,213 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:52,214 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-09-08 03:30:52,214 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:52,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:52,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:52,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:30:52,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:52,219 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:52,219 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:52,219 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) [2019-09-08 03:30:52,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:30:52,284 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 03:30:52,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:52,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-08 03:30:52,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:52,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-08 03:30:52,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:52,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-08 03:30:52,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 03:30:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 03:30:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:30:52,431 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 13 states. [2019-09-08 03:30:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:52,629 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2019-09-08 03:30:52,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 03:30:52,630 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-09-08 03:30:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:52,631 INFO L225 Difference]: With dead ends: 54 [2019-09-08 03:30:52,631 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 03:30:52,632 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:30:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 03:30:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-08 03:30:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 03:30:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-08 03:30:52,643 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 56 [2019-09-08 03:30:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:52,644 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-08 03:30:52,644 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 03:30:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-08 03:30:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-08 03:30:52,645 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:52,645 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:52,645 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-09-08 03:30:52,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:52,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:52,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:52,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:30:52,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:52,650 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:52,650 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:52,651 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 [2019-09-08 03:30:52,669 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:30:53,630 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 03:30:53,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:53,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-08 03:30:53,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:53,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-09-08 03:30:53,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:53,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-08 03:30:53,891 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 03:30:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 03:30:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:30:53,893 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 15 states. [2019-09-08 03:30:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:54,218 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-09-08 03:30:54,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 03:30:54,218 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-09-08 03:30:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:54,219 INFO L225 Difference]: With dead ends: 57 [2019-09-08 03:30:54,219 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 03:30:54,220 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:30:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 03:30:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-08 03:30:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 03:30:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-09-08 03:30:54,246 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 63 [2019-09-08 03:30:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:54,246 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-09-08 03:30:54,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 03:30:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-09-08 03:30:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-08 03:30:54,248 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:54,248 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:54,249 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 855290405, now seen corresponding path program 7 times [2019-09-08 03:30:54,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:54,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:54,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:30:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:54,262 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:54,262 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:54,262 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) [2019-09-08 03:30:54,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:30:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:30:54,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2019-09-08 03:30:54,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:56,532 WARN L860 $PredicateComparison]: unable to prove that (and (< 6 c_main_~k~0) (<= c_main_~c~0 7) (= 0 (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (+ (+ (+ (- (* c_main_~y~0 (* (* (* 5 c_main_~y~0) c_main_~y~0) c_main_~y~0))) (+ (* (* c_main_~y~0 (* (* (* c_main_~y~0 (* (- 2) c_main_~y~0)) c_main_~y~0) c_main_~y~0)) c_main_~y~0) (- (* (* c_main_~y~0 (* (* (* 6 c_main_~y~0) c_main_~y~0) c_main_~y~0)) c_main_~y~0)))) .cse0) (* (+ (+ (let ((.cse1 (+ c_main_~y~0 (- 1)))) (* .cse1 (* .cse1 (* .cse1 (* .cse1 .cse1))))) 4425) (* (* (* c_main_~y~0 .cse0) c_main_~y~0) c_main_~y~0)) 12)))) (= c_main_~y~0 7)) is different from true [2019-09-08 03:30:56,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 34 proven. 103 refuted. 0 times theorem prover too weak. 102 trivial. 7 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:30:56,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:56,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-08 03:30:56,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 03:30:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 03:30:56,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=183, Unknown=1, NotChecked=26, Total=240 [2019-09-08 03:30:56,649 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 16 states. [2019-09-08 03:30:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:30:59,072 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2019-09-08 03:30:59,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 03:30:59,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-09-08 03:30:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:30:59,074 INFO L225 Difference]: With dead ends: 64 [2019-09-08 03:30:59,074 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 03:30:59,074 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=45, Invalid=264, Unknown=1, NotChecked=32, Total=342 [2019-09-08 03:30:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 03:30:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-08 03:30:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-08 03:30:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-09-08 03:30:59,087 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 70 [2019-09-08 03:30:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:30:59,088 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-09-08 03:30:59,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 03:30:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-09-08 03:30:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-08 03:30:59,090 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:30:59,090 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:30:59,090 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:30:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:30:59,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1484740595, now seen corresponding path program 8 times [2019-09-08 03:30:59,091 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:30:59,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:30:59,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:59,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:30:59,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:30:59,096 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:30:59,096 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:30:59,096 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:30:59,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:30:59,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:30:59,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:30:59,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-08 03:30:59,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:30:59,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:30:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 39 proven. 137 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-09-08 03:30:59,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:30:59,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-08 03:30:59,623 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 03:30:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 03:30:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:30:59,625 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 17 states. [2019-09-08 03:31:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:00,143 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2019-09-08 03:31:00,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 03:31:00,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-09-08 03:31:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:00,146 INFO L225 Difference]: With dead ends: 71 [2019-09-08 03:31:00,146 INFO L226 Difference]: Without dead ends: 65 [2019-09-08 03:31:00,146 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:31:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-08 03:31:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-08 03:31:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-08 03:31:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2019-09-08 03:31:00,160 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 77 [2019-09-08 03:31:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:00,160 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2019-09-08 03:31:00,160 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 03:31:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2019-09-08 03:31:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-08 03:31:00,162 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:00,162 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:00,162 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1487028955, now seen corresponding path program 9 times [2019-09-08 03:31:00,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:00,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:00,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:00,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:31:00,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:00,167 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:31:00,167 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:31:00,167 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:31:00,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:31:00,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 03:31:00,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:31:00,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-08 03:31:00,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:00,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:31:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:31:00,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:31:00,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-08 03:31:00,857 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:31:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:31:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:31:00,857 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 18 states. [2019-09-08 03:31:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:01,261 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2019-09-08 03:31:01,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:31:01,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-09-08 03:31:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:01,263 INFO L225 Difference]: With dead ends: 74 [2019-09-08 03:31:01,263 INFO L226 Difference]: Without dead ends: 68 [2019-09-08 03:31:01,264 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:31:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-08 03:31:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-08 03:31:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 03:31:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-09-08 03:31:01,278 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 84 [2019-09-08 03:31:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:01,278 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-09-08 03:31:01,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:31:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-09-08 03:31:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 03:31:01,280 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:01,280 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:01,280 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1163182835, now seen corresponding path program 10 times [2019-09-08 03:31:01,281 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:01,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:01,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:01,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:31:01,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:01,285 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:31:01,285 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:31:01,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:31:01,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:31:01,338 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:31:01,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:31:01,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-08 03:31:01,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:01,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:31:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:31:01,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:31:01,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-08 03:31:01,612 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:31:01,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:31:01,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:31:01,613 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 18 states. [2019-09-08 03:31:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:02,021 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-09-08 03:31:02,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 03:31:02,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-08 03:31:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:02,022 INFO L225 Difference]: With dead ends: 77 [2019-09-08 03:31:02,022 INFO L226 Difference]: Without dead ends: 71 [2019-09-08 03:31:02,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:31:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-08 03:31:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-08 03:31:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-08 03:31:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2019-09-08 03:31:02,055 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 91 [2019-09-08 03:31:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:02,057 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2019-09-08 03:31:02,057 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:31:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2019-09-08 03:31:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-08 03:31:02,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:02,059 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:02,059 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1609463771, now seen corresponding path program 11 times [2019-09-08 03:31:02,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:02,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:02,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:31:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:02,071 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:31:02,071 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:31:02,072 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:31:02,086 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:31:02,164 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-08 03:31:02,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:31:02,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 60 conjunts are in the unsatisfiable core [2019-09-08 03:31:02,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:02,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:31:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 31 proven. 229 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-08 03:31:02,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:31:02,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-08 03:31:02,388 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 03:31:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 03:31:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:31:02,389 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 19 states. [2019-09-08 03:31:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:02,816 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2019-09-08 03:31:02,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 03:31:02,817 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2019-09-08 03:31:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:02,818 INFO L225 Difference]: With dead ends: 80 [2019-09-08 03:31:02,819 INFO L226 Difference]: Without dead ends: 74 [2019-09-08 03:31:02,820 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:31:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-08 03:31:02,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-08 03:31:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-08 03:31:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2019-09-08 03:31:02,834 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 98 [2019-09-08 03:31:02,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:02,835 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2019-09-08 03:31:02,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 03:31:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2019-09-08 03:31:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-08 03:31:02,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:02,836 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:02,836 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1322446323, now seen corresponding path program 12 times [2019-09-08 03:31:02,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:02,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:02,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:02,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:31:02,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:02,841 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:31:02,841 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:31:02,842 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) [2019-09-08 03:31:02,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:31:03,051 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 03:31:03,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:31:03,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 66 conjunts are in the unsatisfiable core [2019-09-08 03:31:03,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:03,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:31:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 27 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-09-08 03:31:03,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:31:03,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-08 03:31:03,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 03:31:03,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 03:31:03,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:31:03,338 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 21 states. [2019-09-08 03:31:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:03,869 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2019-09-08 03:31:03,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 03:31:03,869 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2019-09-08 03:31:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:03,871 INFO L225 Difference]: With dead ends: 83 [2019-09-08 03:31:03,871 INFO L226 Difference]: Without dead ends: 77 [2019-09-08 03:31:03,872 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:31:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-08 03:31:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-08 03:31:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 03:31:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-09-08 03:31:03,886 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 105 [2019-09-08 03:31:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:03,887 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-09-08 03:31:03,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 03:31:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-09-08 03:31:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-08 03:31:03,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:03,888 INFO L399 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:03,889 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash -523889883, now seen corresponding path program 13 times [2019-09-08 03:31:03,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:03,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:03,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:03,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:31:03,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:03,894 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:31:03,894 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:31:03,894 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 [2019-09-08 03:31:03,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:31:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:31:03,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 101 conjunts are in the unsatisfiable core [2019-09-08 03:31:03,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:04,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:31:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 64 proven. 317 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-09-08 03:31:04,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:31:04,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-08 03:31:04,516 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 03:31:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 03:31:04,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:31:04,516 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 22 states. [2019-09-08 03:31:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:12,173 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2019-09-08 03:31:12,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 03:31:12,173 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 112 [2019-09-08 03:31:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:12,175 INFO L225 Difference]: With dead ends: 90 [2019-09-08 03:31:12,175 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 03:31:12,176 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:31:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 03:31:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-08 03:31:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 03:31:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2019-09-08 03:31:12,192 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 112 [2019-09-08 03:31:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:12,192 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2019-09-08 03:31:12,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 03:31:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2019-09-08 03:31:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-08 03:31:12,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:12,194 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:12,194 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:12,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1096165133, now seen corresponding path program 14 times [2019-09-08 03:31:12,195 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:12,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:12,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:12,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:31:12,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:12,199 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:31:12,199 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:31:12,200 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:31:12,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:31:12,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:31:12,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:31:12,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 109 conjunts are in the unsatisfiable core [2019-09-08 03:31:12,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:12,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:31:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 69 proven. 362 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-09-08 03:31:12,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:31:12,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-08 03:31:12,875 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 03:31:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 03:31:12,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:31:12,876 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 23 states. [2019-09-08 03:31:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:13,834 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2019-09-08 03:31:13,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 03:31:13,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2019-09-08 03:31:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:13,836 INFO L225 Difference]: With dead ends: 97 [2019-09-08 03:31:13,836 INFO L226 Difference]: Without dead ends: 91 [2019-09-08 03:31:13,837 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:31:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-08 03:31:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-08 03:31:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-08 03:31:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2019-09-08 03:31:13,854 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 119 [2019-09-08 03:31:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:13,855 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2019-09-08 03:31:13,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 03:31:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2019-09-08 03:31:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-08 03:31:13,857 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:13,857 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:13,857 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash -114598363, now seen corresponding path program 15 times [2019-09-08 03:31:13,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:13,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:13,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:13,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:31:13,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:13,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:31:13,862 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:31:13,862 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:31:13,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:33:27,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 03:33:27,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:33:27,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-08 03:33:27,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:33:27,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:33:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 33 proven. 409 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-09-08 03:33:27,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:33:27,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-08 03:33:27,621 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 03:33:27,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 03:33:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:33:27,622 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 24 states. [2019-09-08 03:33:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:33:28,351 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2019-09-08 03:33:28,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 03:33:28,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2019-09-08 03:33:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:33:28,352 INFO L225 Difference]: With dead ends: 100 [2019-09-08 03:33:28,353 INFO L226 Difference]: Without dead ends: 94 [2019-09-08 03:33:28,354 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:33:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-08 03:33:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-08 03:33:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-08 03:33:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-09-08 03:33:28,385 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 126 [2019-09-08 03:33:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:33:28,386 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-09-08 03:33:28,386 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 03:33:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-09-08 03:33:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-08 03:33:28,391 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:33:28,391 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:33:28,392 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:33:28,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:33:28,392 INFO L82 PathProgramCache]: Analyzing trace with hash -713655283, now seen corresponding path program 16 times [2019-09-08 03:33:28,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:33:28,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:33:28,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:28,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:33:28,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:28,413 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:33:28,414 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:33:28,414 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) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:33:28,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:33:28,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:33:28,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:33:28,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 80 conjunts are in the unsatisfiable core [2019-09-08 03:33:28,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:33:28,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:33:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 35 proven. 460 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-09-08 03:33:29,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:33:29,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-08 03:33:29,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 03:33:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 03:33:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:33:29,050 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 24 states. [2019-09-08 03:33:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:33:29,770 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-08 03:33:29,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 03:33:29,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 133 [2019-09-08 03:33:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:33:29,772 INFO L225 Difference]: With dead ends: 103 [2019-09-08 03:33:29,772 INFO L226 Difference]: Without dead ends: 97 [2019-09-08 03:33:29,772 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:33:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-08 03:33:29,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-08 03:33:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-08 03:33:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2019-09-08 03:33:29,789 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 133 [2019-09-08 03:33:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:33:29,789 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2019-09-08 03:33:29,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 03:33:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2019-09-08 03:33:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-08 03:33:29,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:33:29,791 INFO L399 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:33:29,791 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:33:29,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:33:29,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1156671781, now seen corresponding path program 17 times [2019-09-08 03:33:29,792 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:33:29,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:33:29,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:29,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:33:29,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:29,796 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:33:29,796 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:33:29,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:33:29,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:33:30,084 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 03:33:30,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:33:30,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 84 conjunts are in the unsatisfiable core [2019-09-08 03:33:30,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:33:30,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:33:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 43 proven. 508 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-08 03:33:30,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:33:30,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-08 03:33:30,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 03:33:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 03:33:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:33:30,440 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 25 states. [2019-09-08 03:33:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:33:31,241 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2019-09-08 03:33:31,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-08 03:33:31,245 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 140 [2019-09-08 03:33:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:33:31,247 INFO L225 Difference]: With dead ends: 106 [2019-09-08 03:33:31,247 INFO L226 Difference]: Without dead ends: 100 [2019-09-08 03:33:31,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:33:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-08 03:33:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-08 03:33:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-08 03:33:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2019-09-08 03:33:31,265 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 140 [2019-09-08 03:33:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:33:31,266 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2019-09-08 03:33:31,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 03:33:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2019-09-08 03:33:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-08 03:33:31,267 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:33:31,267 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:33:31,268 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:33:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:33:31,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1948380915, now seen corresponding path program 18 times [2019-09-08 03:33:31,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:33:31,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:33:31,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:31,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:33:31,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:31,273 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:33:31,273 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:33:31,273 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:33:31,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:33:33,235 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 03:33:33,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:33:33,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 90 conjunts are in the unsatisfiable core [2019-09-08 03:33:33,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:33:33,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:33:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 39 proven. 571 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-08 03:33:33,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:33:33,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-08 03:33:33,783 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 03:33:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 03:33:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:33:33,784 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 27 states. [2019-09-08 03:33:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:33:34,783 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2019-09-08 03:33:34,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 03:33:34,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 147 [2019-09-08 03:33:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:33:34,785 INFO L225 Difference]: With dead ends: 109 [2019-09-08 03:33:34,785 INFO L226 Difference]: Without dead ends: 103 [2019-09-08 03:33:34,787 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:33:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-08 03:33:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-08 03:33:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-08 03:33:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2019-09-08 03:33:34,802 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 147 [2019-09-08 03:33:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:33:34,803 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2019-09-08 03:33:34,803 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 03:33:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2019-09-08 03:33:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-08 03:33:34,804 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:33:34,804 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:33:34,804 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:33:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:33:34,804 INFO L82 PathProgramCache]: Analyzing trace with hash -339200987, now seen corresponding path program 19 times [2019-09-08 03:33:34,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:33:34,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:33:34,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:34,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:33:34,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:34,808 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:33:34,809 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:33:34,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:33:34,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:33:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:33:34,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 137 conjunts are in the unsatisfiable core [2019-09-08 03:33:34,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:33:35,319 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-09-08 03:33:38,298 WARN L188 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-09-08 03:33:38,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:33:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 94 proven. 632 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2019-09-08 03:33:38,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:33:38,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-08 03:33:38,455 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 03:33:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 03:33:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:33:38,456 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand 28 states. [2019-09-08 03:33:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:33:45,823 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2019-09-08 03:33:45,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 03:33:45,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-09-08 03:33:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:33:45,825 INFO L225 Difference]: With dead ends: 116 [2019-09-08 03:33:45,825 INFO L226 Difference]: Without dead ends: 110 [2019-09-08 03:33:45,826 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:33:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-08 03:33:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-08 03:33:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-08 03:33:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2019-09-08 03:33:45,844 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 154 [2019-09-08 03:33:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:33:45,844 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2019-09-08 03:33:45,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 03:33:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2019-09-08 03:33:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-08 03:33:45,846 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:33:45,846 INFO L399 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:33:45,846 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:33:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:33:45,846 INFO L82 PathProgramCache]: Analyzing trace with hash 920446477, now seen corresponding path program 20 times [2019-09-08 03:33:45,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:33:45,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:33:45,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:45,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:33:45,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:45,851 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:33:45,852 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:33:45,852 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:33:45,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:33:45,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:33:45,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:33:45,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 145 conjunts are in the unsatisfiable core [2019-09-08 03:33:45,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:33:46,348 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-09-08 03:33:46,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:33:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 99 proven. 695 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2019-09-08 03:33:47,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:33:47,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-08 03:33:47,024 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 03:33:47,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 03:33:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:33:47,025 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 29 states. [2019-09-08 03:33:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:33:56,468 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2019-09-08 03:33:56,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 03:33:56,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 161 [2019-09-08 03:33:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:33:56,470 INFO L225 Difference]: With dead ends: 123 [2019-09-08 03:33:56,471 INFO L226 Difference]: Without dead ends: 117 [2019-09-08 03:33:56,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:33:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-08 03:33:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-09-08 03:33:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-08 03:33:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2019-09-08 03:33:56,493 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 161 [2019-09-08 03:33:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:33:56,493 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2019-09-08 03:33:56,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 03:33:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2019-09-08 03:33:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-09-08 03:33:56,494 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:33:56,495 INFO L399 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:33:56,495 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:33:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:33:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash -513818843, now seen corresponding path program 21 times [2019-09-08 03:33:56,495 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:33:56,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:33:56,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:56,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:33:56,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:33:56,500 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:33:56,501 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:33:56,501 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:33:56,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:33:58,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-08 03:33:58,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:33:58,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 114 conjunts are in the unsatisfiable core [2019-09-08 03:33:58,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:34:00,975 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-09-08 03:34:01,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:34:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 157 proven. 762 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2019-09-08 03:34:01,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:34:01,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-08 03:34:01,118 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-08 03:34:01,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-08 03:34:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:34:01,118 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand 32 states. [2019-09-08 03:34:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:34:02,255 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2019-09-08 03:34:02,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 03:34:02,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 168 [2019-09-08 03:34:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:34:02,257 INFO L225 Difference]: With dead ends: 130 [2019-09-08 03:34:02,258 INFO L226 Difference]: Without dead ends: 124 [2019-09-08 03:34:02,259 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:34:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-08 03:34:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-08 03:34:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-08 03:34:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2019-09-08 03:34:02,274 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 168 [2019-09-08 03:34:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:34:02,275 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2019-09-08 03:34:02,275 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-08 03:34:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2019-09-08 03:34:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-08 03:34:02,279 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:34:02,279 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:34:02,280 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:34:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:34:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1556282125, now seen corresponding path program 22 times [2019-09-08 03:34:02,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:34:02,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:34:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:02,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:34:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:02,287 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:34:02,287 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:34:02,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:34:02,296 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:34:02,373 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:34:02,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:34:02,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-08 03:34:02,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:34:02,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:34:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 47 proven. 829 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:34:02,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:34:02,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-08 03:34:02,878 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 03:34:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 03:34:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:34:02,879 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 30 states. [2019-09-08 03:34:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:34:03,969 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2019-09-08 03:34:03,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 03:34:03,969 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 175 [2019-09-08 03:34:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:34:03,971 INFO L225 Difference]: With dead ends: 133 [2019-09-08 03:34:03,971 INFO L226 Difference]: Without dead ends: 127 [2019-09-08 03:34:03,972 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:34:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-08 03:34:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2019-09-08 03:34:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-09-08 03:34:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2019-09-08 03:34:03,995 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 175 [2019-09-08 03:34:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:34:03,995 INFO L475 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2019-09-08 03:34:03,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 03:34:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2019-09-08 03:34:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-09-08 03:34:03,996 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:34:03,997 INFO L399 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:34:03,997 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:34:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:34:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash -446166491, now seen corresponding path program 23 times [2019-09-08 03:34:03,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:34:03,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:34:03,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:03,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:34:03,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:04,003 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:34:04,003 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:34:04,003 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:34:04,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:34:16,341 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-08 03:34:16,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:34:16,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-08 03:34:16,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:34:19,803 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 42 DAG size of output: 8 [2019-09-08 03:34:19,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:34:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 361 proven. 949 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-09-08 03:34:19,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:34:19,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-08 03:34:19,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 03:34:19,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 03:34:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=990, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:34:19,929 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 33 states. [2019-09-08 03:34:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:34:21,386 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2019-09-08 03:34:21,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 03:34:21,386 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 182 [2019-09-08 03:34:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:34:21,388 INFO L225 Difference]: With dead ends: 140 [2019-09-08 03:34:21,388 INFO L226 Difference]: Without dead ends: 134 [2019-09-08 03:34:21,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 136 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:34:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-08 03:34:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2019-09-08 03:34:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-09-08 03:34:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2019-09-08 03:34:21,415 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 182 [2019-09-08 03:34:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:34:21,415 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2019-09-08 03:34:21,415 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 03:34:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2019-09-08 03:34:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-08 03:34:21,416 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:34:21,417 INFO L399 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:34:21,417 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:34:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:34:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash 937447437, now seen corresponding path program 24 times [2019-09-08 03:34:21,417 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:34:21,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:34:21,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:21,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:34:21,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:21,423 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:34:21,424 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:34:21,424 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:34:21,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:34:25,936 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 03:34:25,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:34:25,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 114 conjunts are in the unsatisfiable core [2019-09-08 03:34:25,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:34:26,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:34:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 51 proven. 976 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-09-08 03:34:26,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:34:26,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-08 03:34:26,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 03:34:26,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 03:34:26,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:34:26,514 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand 33 states. [2019-09-08 03:34:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:34:27,750 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2019-09-08 03:34:27,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 03:34:27,750 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 189 [2019-09-08 03:34:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:34:27,752 INFO L225 Difference]: With dead ends: 143 [2019-09-08 03:34:27,752 INFO L226 Difference]: Without dead ends: 137 [2019-09-08 03:34:27,754 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:34:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-08 03:34:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-09-08 03:34:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-09-08 03:34:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2019-09-08 03:34:27,776 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 189 [2019-09-08 03:34:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:34:27,776 INFO L475 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2019-09-08 03:34:27,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 03:34:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2019-09-08 03:34:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-08 03:34:27,778 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:34:27,778 INFO L399 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:34:27,778 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:34:27,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:34:27,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2087643867, now seen corresponding path program 25 times [2019-09-08 03:34:27,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:34:27,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:34:27,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:27,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:34:27,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:27,784 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:34:27,784 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:34:27,784 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:34:27,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:34:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:34:27,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 173 conjunts are in the unsatisfiable core [2019-09-08 03:34:27,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:34:29,692 WARN L188 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 28 [2019-09-08 03:34:30,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:34:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2433 backedges. 124 proven. 1055 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-09-08 03:34:30,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:34:30,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-08 03:34:30,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 03:34:30,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 03:34:30,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:34:30,196 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 34 states. [2019-09-08 03:34:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:34:52,480 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2019-09-08 03:34:52,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-08 03:34:52,481 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 196 [2019-09-08 03:34:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:34:52,483 INFO L225 Difference]: With dead ends: 150 [2019-09-08 03:34:52,483 INFO L226 Difference]: Without dead ends: 144 [2019-09-08 03:34:52,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 03:34:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-08 03:34:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-09-08 03:34:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-08 03:34:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2019-09-08 03:34:52,519 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 196 [2019-09-08 03:34:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:34:52,520 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2019-09-08 03:34:52,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 03:34:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2019-09-08 03:34:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-08 03:34:52,522 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:34:52,522 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:34:52,522 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:34:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:34:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1232804595, now seen corresponding path program 26 times [2019-09-08 03:34:52,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:34:52,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:34:52,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:52,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:34:52,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:34:52,528 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:34:52,529 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:34:52,529 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:34:52,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:34:52,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:34:52,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:34:52,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 181 conjunts are in the unsatisfiable core [2019-09-08 03:34:52,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:34:55,236 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 28 [2019-09-08 03:34:55,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:34:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2621 backedges. 129 proven. 1136 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-08 03:34:55,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:34:55,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-08 03:34:55,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 03:34:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 03:34:55,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:34:55,965 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand 35 states. [2019-09-08 03:35:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:35:02,421 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2019-09-08 03:35:02,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 03:35:02,422 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 203 [2019-09-08 03:35:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:35:02,424 INFO L225 Difference]: With dead ends: 157 [2019-09-08 03:35:02,424 INFO L226 Difference]: Without dead ends: 151 [2019-09-08 03:35:02,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=85, Invalid=1321, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:35:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-08 03:35:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-09-08 03:35:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-08 03:35:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2019-09-08 03:35:02,448 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 203 [2019-09-08 03:35:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:35:02,448 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2019-09-08 03:35:02,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 03:35:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2019-09-08 03:35:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-09-08 03:35:02,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:35:02,450 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:35:02,450 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:35:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:35:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash 327868453, now seen corresponding path program 27 times [2019-09-08 03:35:02,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:35:02,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:35:02,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:35:02,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:35:02,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:35:02,455 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:35:02,456 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:35:02,456 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:35:02,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:39:04,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-08 03:39:04,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:39:04,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 126 conjunts are in the unsatisfiable core [2019-09-08 03:39:04,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:39:05,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:39:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 57 proven. 1219 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2019-09-08 03:39:05,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:39:05,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-08 03:39:05,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 03:39:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 03:39:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:39:05,123 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 36 states. [2019-09-08 03:39:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:39:06,710 INFO L93 Difference]: Finished difference Result 160 states and 177 transitions. [2019-09-08 03:39:06,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-08 03:39:06,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 210 [2019-09-08 03:39:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:39:06,713 INFO L225 Difference]: With dead ends: 160 [2019-09-08 03:39:06,713 INFO L226 Difference]: Without dead ends: 154 [2019-09-08 03:39:06,714 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:39:06,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-08 03:39:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-09-08 03:39:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-08 03:39:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2019-09-08 03:39:06,741 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 210 [2019-09-08 03:39:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:39:06,741 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2019-09-08 03:39:06,741 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 03:39:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2019-09-08 03:39:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-09-08 03:39:06,743 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:39:06,743 INFO L399 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:39:06,743 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:39:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:39:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2063645197, now seen corresponding path program 28 times [2019-09-08 03:39:06,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:39:06,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:39:06,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:39:06,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:39:06,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:39:06,750 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:39:06,750 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:39:06,750 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:39:06,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:39:06,917 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:39:06,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:39:06,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 128 conjunts are in the unsatisfiable core [2019-09-08 03:39:06,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:39:07,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:39:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3018 backedges. 59 proven. 1306 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2019-09-08 03:39:07,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:39:07,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-08 03:39:07,593 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 03:39:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 03:39:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:39:07,594 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand 36 states. [2019-09-08 03:39:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:39:09,183 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2019-09-08 03:39:09,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 03:39:09,183 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 217 [2019-09-08 03:39:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:39:09,185 INFO L225 Difference]: With dead ends: 163 [2019-09-08 03:39:09,185 INFO L226 Difference]: Without dead ends: 157 [2019-09-08 03:39:09,188 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:39:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-08 03:39:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-09-08 03:39:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-08 03:39:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2019-09-08 03:39:09,221 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 217 [2019-09-08 03:39:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:39:09,222 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2019-09-08 03:39:09,222 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 03:39:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2019-09-08 03:39:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-08 03:39:09,225 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:39:09,225 INFO L399 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:39:09,225 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:39:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:39:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1190827227, now seen corresponding path program 29 times [2019-09-08 03:39:09,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:39:09,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:39:09,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:39:09,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:39:09,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:39:09,248 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:39:09,248 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:39:09,248 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:39:09,281 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1