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/reducercommutativity/rangesum20.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 14:31:27,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 14:31:27,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 14:31:27,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 14:31:27,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 14:31:27,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 14:31:27,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 14:31:27,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 14:31:27,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 14:31:27,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 14:31:27,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 14:31:27,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 14:31:27,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 14:31:27,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 14:31:27,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 14:31:27,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 14:31:27,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 14:31:27,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 14:31:27,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 14:31:27,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 14:31:27,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 14:31:27,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 14:31:27,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 14:31:27,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 14:31:27,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 14:31:27,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 14:31:27,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 14:31:27,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 14:31:27,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 14:31:27,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 14:31:27,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 14:31:27,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 14:31:27,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 14:31:27,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 14:31:27,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 14:31:27,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 14:31:27,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 14:31:27,227 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 14:31:27,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 14:31:27,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 14:31:27,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 14:31:27,229 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 14:31:27,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 14:31:27,230 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 14:31:27,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 14:31:27,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 14:31:27,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 14:31:27,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 14:31:27,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 14:31:27,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 14:31:27,231 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 14:31:27,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 14:31:27,231 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 14:31:27,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 14:31:27,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 14:31:27,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 14:31:27,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 14:31:27,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 14:31:27,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 14:31:27,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 14:31:27,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 14:31:27,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 14:31:27,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 14:31:27,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 14:31:27,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 14:31:27,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 14:31:27,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 14:31:27,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 14:31:27,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 14:31:27,280 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 14:31:27,280 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 14:31:27,281 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum20.i [2019-10-02 14:31:27,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b23f2e8/092d23f3e30b4e1e8a494cc760766383/FLAG2875a3374 [2019-10-02 14:31:27,821 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 14:31:27,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum20.i [2019-10-02 14:31:27,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b23f2e8/092d23f3e30b4e1e8a494cc760766383/FLAG2875a3374 [2019-10-02 14:31:28,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b23f2e8/092d23f3e30b4e1e8a494cc760766383 [2019-10-02 14:31:28,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 14:31:28,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 14:31:28,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 14:31:28,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 14:31:28,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 14:31:28,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4905937d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28, skipping insertion in model container [2019-10-02 14:31:28,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,222 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 14:31:28,242 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 14:31:28,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 14:31:28,455 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 14:31:28,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 14:31:28,593 INFO L192 MainTranslator]: Completed translation [2019-10-02 14:31:28,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28 WrapperNode [2019-10-02 14:31:28,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 14:31:28,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 14:31:28,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 14:31:28,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 14:31:28,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... [2019-10-02 14:31:28,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 14:31:28,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 14:31:28,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 14:31:28,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 14:31:28,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 14:31:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 14:31:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 14:31:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2019-10-02 14:31:28,702 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2019-10-02 14:31:28,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 14:31:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 14:31:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 14:31:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2019-10-02 14:31:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 14:31:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2019-10-02 14:31:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 14:31:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 14:31:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 14:31:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 14:31:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 14:31:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 14:31:29,033 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 14:31:29,034 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-02 14:31:29,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 02:31:29 BoogieIcfgContainer [2019-10-02 14:31:29,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 14:31:29,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 14:31:29,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 14:31:29,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 14:31:29,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 02:31:28" (1/3) ... [2019-10-02 14:31:29,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc5898b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 02:31:29, skipping insertion in model container [2019-10-02 14:31:29,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 02:31:28" (2/3) ... [2019-10-02 14:31:29,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc5898b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 02:31:29, skipping insertion in model container [2019-10-02 14:31:29,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 02:31:29" (3/3) ... [2019-10-02 14:31:29,044 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2019-10-02 14:31:29,054 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 14:31:29,061 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 14:31:29,085 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 14:31:29,124 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 14:31:29,125 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 14:31:29,125 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 14:31:29,125 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 14:31:29,125 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 14:31:29,126 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 14:31:29,126 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 14:31:29,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 14:31:29,126 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 14:31:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-02 14:31:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 14:31:29,151 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:29,152 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:29,154 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:29,161 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2019-10-02 14:31:29,163 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:29,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:29,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:29,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:29,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:29,300 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2019-10-02 14:31:29,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 14:31:29,301 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 14:31:29,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:29,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-02 14:31:29,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-02 14:31:29,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 14:31:29,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 14:31:29,451 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 14:31:29,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 14:31:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 14:31:29,470 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-10-02 14:31:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:29,502 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-10-02 14:31:29,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 14:31:29,504 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2019-10-02 14:31:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:29,515 INFO L225 Difference]: With dead ends: 64 [2019-10-02 14:31:29,515 INFO L226 Difference]: Without dead ends: 32 [2019-10-02 14:31:29,519 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 14:31:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-02 14:31:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-02 14:31:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 14:31:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-02 14:31:29,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2019-10-02 14:31:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:29,575 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-02 14:31:29,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 14:31:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-02 14:31:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 14:31:29,578 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:29,579 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:29,579 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:29,580 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2019-10-02 14:31:29,581 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:29,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:29,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:29,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:29,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:29,601 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:29,602 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:29,602 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:29,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:29,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-02 14:31:29,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:31:29,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 14:31:29,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 14:31:29,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 14:31:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 14:31:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 14:31:29,752 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-10-02 14:31:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:29,790 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-10-02 14:31:29,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 14:31:29,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-10-02 14:31:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:29,793 INFO L225 Difference]: With dead ends: 56 [2019-10-02 14:31:29,793 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 14:31:29,795 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 14:31:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 14:31:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-02 14:31:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 14:31:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-02 14:31:29,814 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2019-10-02 14:31:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:29,815 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-02 14:31:29,816 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 14:31:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-02 14:31:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-02 14:31:29,821 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:29,821 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:29,821 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2019-10-02 14:31:29,824 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:29,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:29,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:29,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:29,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:29,865 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:29,865 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:29,865 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:31:29,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:29,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:31:29,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-02 14:31:29,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 14:31:29,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 14:31:29,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 14:31:29,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 14:31:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 14:31:29,996 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2019-10-02 14:31:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:30,015 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-10-02 14:31:30,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 14:31:30,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-02 14:31:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:30,019 INFO L225 Difference]: With dead ends: 57 [2019-10-02 14:31:30,019 INFO L226 Difference]: Without dead ends: 39 [2019-10-02 14:31:30,020 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 14:31:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-02 14:31:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-02 14:31:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-02 14:31:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-02 14:31:30,031 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2019-10-02 14:31:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:30,031 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-02 14:31:30,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 14:31:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-02 14:31:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-02 14:31:30,033 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:30,033 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:30,033 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2019-10-02 14:31:30,034 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:30,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:30,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:30,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-02 14:31:30,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 14:31:30,116 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 14:31:30,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:30,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-02 14:31:30,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-02 14:31:30,248 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:30,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-10-02 14:31:30,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:31:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:31:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:30,249 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2019-10-02 14:31:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:30,298 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-10-02 14:31:30,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 14:31:30,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-10-02 14:31:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:30,300 INFO L225 Difference]: With dead ends: 62 [2019-10-02 14:31:30,300 INFO L226 Difference]: Without dead ends: 40 [2019-10-02 14:31:30,301 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-02 14:31:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-02 14:31:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-02 14:31:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-02 14:31:30,318 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 39 [2019-10-02 14:31:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:30,320 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-02 14:31:30,320 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:31:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-02 14:31:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-02 14:31:30,323 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:30,323 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:30,323 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2019-10-02 14:31:30,324 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:30,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:30,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:30,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-02 14:31:30,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 14:31:30,402 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 14:31:30,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:30,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-02 14:31:30,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-02 14:31:30,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:30,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-10-02 14:31:30,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:31:30,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:31:30,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:30,491 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2019-10-02 14:31:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:30,543 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2019-10-02 14:31:30,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:31:30,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-10-02 14:31:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:30,545 INFO L225 Difference]: With dead ends: 68 [2019-10-02 14:31:30,545 INFO L226 Difference]: Without dead ends: 44 [2019-10-02 14:31:30,546 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-02 14:31:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-10-02 14:31:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 14:31:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-10-02 14:31:30,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 48 [2019-10-02 14:31:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:30,553 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-10-02 14:31:30,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:31:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-10-02 14:31:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-02 14:31:30,554 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:30,554 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:30,554 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1681907214, now seen corresponding path program 1 times [2019-10-02 14:31:30,555 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:30,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:30,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:30,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,569 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:30,569 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:30,569 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:30,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:30,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:31:30,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-02 14:31:30,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:30,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 14:31:30,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:31:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:31:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:30,668 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 4 states. [2019-10-02 14:31:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:30,692 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2019-10-02 14:31:30,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 14:31:30,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2019-10-02 14:31:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:30,694 INFO L225 Difference]: With dead ends: 68 [2019-10-02 14:31:30,694 INFO L226 Difference]: Without dead ends: 41 [2019-10-02 14:31:30,695 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-02 14:31:30,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-02 14:31:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-02 14:31:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-02 14:31:30,701 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 59 [2019-10-02 14:31:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:30,701 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-02 14:31:30,701 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:31:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-02 14:31:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 14:31:30,702 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:30,702 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:30,703 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:30,703 INFO L82 PathProgramCache]: Analyzing trace with hash 804630256, now seen corresponding path program 2 times [2019-10-02 14:31:30,703 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:30,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:30,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:30,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,716 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:30,717 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:30,717 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:30,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:31:30,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:31:30,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:30,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:31:30,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-02 14:31:30,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:30,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:31:30,860 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:31:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:31:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:30,861 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2019-10-02 14:31:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:30,885 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-10-02 14:31:30,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:31:30,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-02 14:31:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:30,889 INFO L225 Difference]: With dead ends: 70 [2019-10-02 14:31:30,889 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 14:31:30,889 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 14:31:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-02 14:31:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 14:31:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-02 14:31:30,895 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 61 [2019-10-02 14:31:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:30,895 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-02 14:31:30,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:31:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-02 14:31:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-02 14:31:30,896 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:30,897 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:30,897 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1929644946, now seen corresponding path program 3 times [2019-10-02 14:31:30,898 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:30,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:30,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:30,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:30,911 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:30,911 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:30,911 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:31:30,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:30,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-02 14:31:30,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:30,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:31:30,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-02 14:31:31,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:31,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:31:31,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:31:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:31:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:31,034 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2019-10-02 14:31:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:31,070 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2019-10-02 14:31:31,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:31:31,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-02 14:31:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:31,073 INFO L225 Difference]: With dead ends: 70 [2019-10-02 14:31:31,073 INFO L226 Difference]: Without dead ends: 47 [2019-10-02 14:31:31,074 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-02 14:31:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-02 14:31:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-02 14:31:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-10-02 14:31:31,081 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 63 [2019-10-02 14:31:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:31,082 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-10-02 14:31:31,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:31:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-10-02 14:31:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 14:31:31,083 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:31,083 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:31,084 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:31,084 INFO L82 PathProgramCache]: Analyzing trace with hash -575638740, now seen corresponding path program 4 times [2019-10-02 14:31:31,084 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:31,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:31,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:31,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,103 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:31,103 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:31,103 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:31:31,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:31,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:31:31,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:31,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:31:31,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:31:31,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:31,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 14:31:31,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:31:31,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:31:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:31,223 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 4 states. [2019-10-02 14:31:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:31,254 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2019-10-02 14:31:31,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 14:31:31,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-02 14:31:31,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:31,256 INFO L225 Difference]: With dead ends: 75 [2019-10-02 14:31:31,256 INFO L226 Difference]: Without dead ends: 49 [2019-10-02 14:31:31,257 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-02 14:31:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-02 14:31:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 14:31:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2019-10-02 14:31:31,262 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 72 [2019-10-02 14:31:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:31,263 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2019-10-02 14:31:31,263 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:31:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2019-10-02 14:31:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-02 14:31:31,264 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:31,264 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:31,264 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1728458256, now seen corresponding path program 5 times [2019-10-02 14:31:31,265 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:31,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:31,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:31,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,278 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:31,279 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:31,279 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:31,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:31:31,334 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-02 14:31:31,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:31,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 14:31:31,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 129 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-02 14:31:31,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:31,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 14:31:31,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 14:31:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 14:31:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:31:31,372 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 6 states. [2019-10-02 14:31:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:31,413 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2019-10-02 14:31:31,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 14:31:31,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2019-10-02 14:31:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:31,415 INFO L225 Difference]: With dead ends: 82 [2019-10-02 14:31:31,416 INFO L226 Difference]: Without dead ends: 53 [2019-10-02 14:31:31,416 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:31:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-02 14:31:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-10-02 14:31:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-02 14:31:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-10-02 14:31:31,430 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 81 [2019-10-02 14:31:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:31,430 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-10-02 14:31:31,431 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 14:31:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-10-02 14:31:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-02 14:31:31,435 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:31,435 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:31,435 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1893345446, now seen corresponding path program 6 times [2019-10-02 14:31:31,436 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:31,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:31,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:31,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,466 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:31,466 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:31,466 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:31:31,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:31,575 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-02 14:31:31,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:31,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 14:31:31,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-10-02 14:31:31,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:31,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-02 14:31:31,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 14:31:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 14:31:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:31,606 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 4 states. [2019-10-02 14:31:31,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:31,625 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2019-10-02 14:31:31,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 14:31:31,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-10-02 14:31:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:31,626 INFO L225 Difference]: With dead ends: 80 [2019-10-02 14:31:31,626 INFO L226 Difference]: Without dead ends: 54 [2019-10-02 14:31:31,627 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 14:31:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-02 14:31:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-02 14:31:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-02 14:31:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-02 14:31:31,638 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 90 [2019-10-02 14:31:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:31,639 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-02 14:31:31,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 14:31:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-02 14:31:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-02 14:31:31,641 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:31,641 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:31,641 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1039813832, now seen corresponding path program 7 times [2019-10-02 14:31:31,642 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:31,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:31,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:31,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,671 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:31,672 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:31,672 INFO L224 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 [2019-10-02 14:31:31,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:31:31,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 14:31:31,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-02 14:31:31,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:31,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 14:31:31,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 14:31:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 14:31:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:31:31,779 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 6 states. [2019-10-02 14:31:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:31,799 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-10-02 14:31:31,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 14:31:31,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2019-10-02 14:31:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:31,800 INFO L225 Difference]: With dead ends: 94 [2019-10-02 14:31:31,800 INFO L226 Difference]: Without dead ends: 56 [2019-10-02 14:31:31,801 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:31:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-02 14:31:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-02 14:31:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-02 14:31:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-10-02 14:31:31,806 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 92 [2019-10-02 14:31:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:31,807 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-10-02 14:31:31,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 14:31:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-10-02 14:31:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-02 14:31:31,808 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:31,808 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:31,808 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash -919939190, now seen corresponding path program 8 times [2019-10-02 14:31:31,809 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:31,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:31,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:31:31,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:31,821 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:31,821 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:31,822 INFO L224 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 [2019-10-02 14:31:31,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:31:31,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:31:31,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:31,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 14:31:31,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-02 14:31:31,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:31,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 14:31:31,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 14:31:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 14:31:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:31:31,969 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 7 states. [2019-10-02 14:31:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:32,004 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2019-10-02 14:31:32,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 14:31:32,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2019-10-02 14:31:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:32,006 INFO L225 Difference]: With dead ends: 96 [2019-10-02 14:31:32,006 INFO L226 Difference]: Without dead ends: 58 [2019-10-02 14:31:32,006 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:31:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-02 14:31:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-02 14:31:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-02 14:31:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-02 14:31:32,014 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 94 [2019-10-02 14:31:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:32,015 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-02 14:31:32,015 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 14:31:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-02 14:31:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-02 14:31:32,018 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:32,019 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:32,019 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1248049612, now seen corresponding path program 9 times [2019-10-02 14:31:32,020 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:32,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:32,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:32,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,050 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:32,050 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:32,050 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 14:31:32,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:32,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-02 14:31:32,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:32,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:31:32,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-02 14:31:32,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:32,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:31:32,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:31:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:31:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:32,205 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2019-10-02 14:31:32,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:32,222 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2019-10-02 14:31:32,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:31:32,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2019-10-02 14:31:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:32,225 INFO L225 Difference]: With dead ends: 86 [2019-10-02 14:31:32,225 INFO L226 Difference]: Without dead ends: 60 [2019-10-02 14:31:32,226 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-02 14:31:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-02 14:31:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-02 14:31:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-10-02 14:31:32,233 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 96 [2019-10-02 14:31:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:32,233 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-10-02 14:31:32,233 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:31:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-10-02 14:31:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-02 14:31:32,235 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:32,236 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:32,236 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash -614192018, now seen corresponding path program 10 times [2019-10-02 14:31:32,236 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:32,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:32,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:32,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,253 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:32,254 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:32,254 INFO L224 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 [2019-10-02 14:31:32,290 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:31:32,327 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:31:32,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:32,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 14:31:32,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 109 proven. 7 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2019-10-02 14:31:32,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:32,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-02 14:31:32,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 14:31:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 14:31:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:32,370 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 5 states. [2019-10-02 14:31:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:32,391 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2019-10-02 14:31:32,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 14:31:32,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2019-10-02 14:31:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:32,392 INFO L225 Difference]: With dead ends: 99 [2019-10-02 14:31:32,393 INFO L226 Difference]: Without dead ends: 63 [2019-10-02 14:31:32,394 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 14:31:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-02 14:31:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-10-02 14:31:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-02 14:31:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-10-02 14:31:32,401 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 98 [2019-10-02 14:31:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:32,402 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-10-02 14:31:32,402 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 14:31:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-10-02 14:31:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 14:31:32,403 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:32,403 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:32,403 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1172217702, now seen corresponding path program 11 times [2019-10-02 14:31:32,404 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:32,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:32,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:32,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,431 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:32,431 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:32,431 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:31:32,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:31:32,480 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-02 14:31:32,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:31:32,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 14:31:32,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:31:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 273 proven. 15 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:31:32,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:31:32,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 14:31:32,531 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 14:31:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 14:31:32,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:31:32,531 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 7 states. [2019-10-02 14:31:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:31:32,564 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-10-02 14:31:32,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 14:31:32,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-02 14:31:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:31:32,565 INFO L225 Difference]: With dead ends: 106 [2019-10-02 14:31:32,565 INFO L226 Difference]: Without dead ends: 67 [2019-10-02 14:31:32,566 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:31:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-02 14:31:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-02 14:31:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-02 14:31:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2019-10-02 14:31:32,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 107 [2019-10-02 14:31:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:31:32,570 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2019-10-02 14:31:32,571 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 14:31:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2019-10-02 14:31:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-02 14:31:32,572 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:31:32,572 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:31:32,572 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:31:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:31:32,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1003290700, now seen corresponding path program 12 times [2019-10-02 14:31:32,573 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:31:32,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:31:32,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:31:32,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:31:32,583 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:31:32,583 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:31:32,583 INFO L224 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 [2019-10-02 14:31:32,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:40:04,603 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-02 14:40:04,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:04,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 14:40:04,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 332 proven. 9 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2019-10-02 14:40:04,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:04,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 14:40:04,675 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 14:40:04,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 14:40:04,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:40:04,676 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 6 states. [2019-10-02 14:40:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:04,704 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2019-10-02 14:40:04,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 14:40:04,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2019-10-02 14:40:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:04,711 INFO L225 Difference]: With dead ends: 100 [2019-10-02 14:40:04,711 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 14:40:04,712 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:40:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 14:40:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-10-02 14:40:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-02 14:40:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2019-10-02 14:40:04,716 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 116 [2019-10-02 14:40:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:04,716 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2019-10-02 14:40:04,717 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 14:40:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2019-10-02 14:40:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-02 14:40:04,718 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:04,718 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:04,718 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:04,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1333739690, now seen corresponding path program 13 times [2019-10-02 14:40:04,719 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:04,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:04,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:04,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:04,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:04,740 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:04,740 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:04,740 INFO L224 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 [2019-10-02 14:40:04,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:40:04,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 14:40:04,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:40:04,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:04,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 14:40:04,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 14:40:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 14:40:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:04,899 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 8 states. [2019-10-02 14:40:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:04,930 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2019-10-02 14:40:04,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 14:40:04,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-10-02 14:40:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:04,932 INFO L225 Difference]: With dead ends: 118 [2019-10-02 14:40:04,932 INFO L226 Difference]: Without dead ends: 70 [2019-10-02 14:40:04,933 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-02 14:40:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-10-02 14:40:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-02 14:40:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-10-02 14:40:04,940 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 118 [2019-10-02 14:40:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:04,941 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-10-02 14:40:04,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 14:40:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-10-02 14:40:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-02 14:40:04,942 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:04,942 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:04,942 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1037599848, now seen corresponding path program 14 times [2019-10-02 14:40:04,943 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:04,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:04,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:04,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:04,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:04,956 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:04,956 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:04,956 INFO L224 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 [2019-10-02 14:40:04,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:40:05,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:40:05,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:05,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:40:05,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:40:05,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:05,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:40:05,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:40:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:40:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:05,120 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 9 states. [2019-10-02 14:40:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:05,159 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2019-10-02 14:40:05,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:40:05,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 120 [2019-10-02 14:40:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:05,162 INFO L225 Difference]: With dead ends: 120 [2019-10-02 14:40:05,162 INFO L226 Difference]: Without dead ends: 72 [2019-10-02 14:40:05,163 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-02 14:40:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-02 14:40:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-02 14:40:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2019-10-02 14:40:05,167 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 120 [2019-10-02 14:40:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:05,168 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2019-10-02 14:40:05,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:40:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2019-10-02 14:40:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-02 14:40:05,169 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:05,169 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:05,170 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:05,170 INFO L82 PathProgramCache]: Analyzing trace with hash 84946778, now seen corresponding path program 15 times [2019-10-02 14:40:05,170 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:05,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:05,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:05,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:05,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:05,182 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:05,182 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:05,182 INFO L224 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 [2019-10-02 14:40:05,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:40:13,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-02 14:40:13,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:13,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 14:40:13,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-10-02 14:40:13,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:13,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 14:40:13,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 14:40:13,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 14:40:13,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:40:13,250 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 7 states. [2019-10-02 14:40:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:13,287 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2019-10-02 14:40:13,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 14:40:13,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2019-10-02 14:40:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:13,289 INFO L225 Difference]: With dead ends: 106 [2019-10-02 14:40:13,289 INFO L226 Difference]: Without dead ends: 74 [2019-10-02 14:40:13,290 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:40:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-02 14:40:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-02 14:40:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-02 14:40:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-10-02 14:40:13,300 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 122 [2019-10-02 14:40:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:13,300 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-10-02 14:40:13,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 14:40:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-10-02 14:40:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-02 14:40:13,301 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:13,302 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:13,302 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash 785423740, now seen corresponding path program 16 times [2019-10-02 14:40:13,303 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:13,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:13,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:13,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:13,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:13,331 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:13,331 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:13,331 INFO L224 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) [2019-10-02 14:40:13,371 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:13,415 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:40:13,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:13,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 14:40:13,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 204 proven. 15 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2019-10-02 14:40:13,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:13,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 14:40:13,468 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 14:40:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 14:40:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:40:13,469 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 6 states. [2019-10-02 14:40:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:13,502 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2019-10-02 14:40:13,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 14:40:13,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2019-10-02 14:40:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:13,504 INFO L225 Difference]: With dead ends: 123 [2019-10-02 14:40:13,504 INFO L226 Difference]: Without dead ends: 77 [2019-10-02 14:40:13,505 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 14:40:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-02 14:40:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-10-02 14:40:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-02 14:40:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2019-10-02 14:40:13,513 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 124 [2019-10-02 14:40:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:13,513 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2019-10-02 14:40:13,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 14:40:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2019-10-02 14:40:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-02 14:40:13,515 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:13,515 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:13,515 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:13,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:13,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1542637728, now seen corresponding path program 17 times [2019-10-02 14:40:13,516 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:13,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:13,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:13,549 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:13,549 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:13,552 INFO L224 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:13,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:40:13,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-02 14:40:13,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:13,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 14:40:13,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 471 proven. 26 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2019-10-02 14:40:13,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:13,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 14:40:13,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 14:40:13,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 14:40:13,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:13,715 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 8 states. [2019-10-02 14:40:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:13,780 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2019-10-02 14:40:13,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 14:40:13,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2019-10-02 14:40:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:13,785 INFO L225 Difference]: With dead ends: 130 [2019-10-02 14:40:13,785 INFO L226 Difference]: Without dead ends: 81 [2019-10-02 14:40:13,785 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-02 14:40:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-10-02 14:40:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-02 14:40:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-10-02 14:40:13,793 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 133 [2019-10-02 14:40:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:13,794 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-10-02 14:40:13,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 14:40:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-10-02 14:40:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-02 14:40:13,796 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:13,796 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:13,796 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:13,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1074644086, now seen corresponding path program 18 times [2019-10-02 14:40:13,797 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:13,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:13,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:13,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:13,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:13,809 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:13,809 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:13,809 INFO L224 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:13,834 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:40:19,509 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-02 14:40:19,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:19,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 14:40:19,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 532 proven. 25 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-10-02 14:40:19,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:19,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 14:40:19,591 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 14:40:19,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 14:40:19,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:19,592 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 8 states. [2019-10-02 14:40:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:19,620 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-10-02 14:40:19,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 14:40:19,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 142 [2019-10-02 14:40:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:19,626 INFO L225 Difference]: With dead ends: 120 [2019-10-02 14:40:19,626 INFO L226 Difference]: Without dead ends: 82 [2019-10-02 14:40:19,627 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-02 14:40:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-10-02 14:40:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-02 14:40:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-10-02 14:40:19,632 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 142 [2019-10-02 14:40:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:19,632 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-10-02 14:40:19,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 14:40:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-10-02 14:40:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-02 14:40:19,634 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:19,634 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:19,634 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:19,635 INFO L82 PathProgramCache]: Analyzing trace with hash -737345128, now seen corresponding path program 19 times [2019-10-02 14:40:19,635 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:19,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:19,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:19,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:19,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:19,646 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:19,646 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:19,646 INFO L224 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) [2019-10-02 14:40:19,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:40:19,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 14:40:19,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-02 14:40:19,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:19,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:40:19,822 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:40:19,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:40:19,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:19,822 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 10 states. [2019-10-02 14:40:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:19,865 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2019-10-02 14:40:19,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:40:19,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 144 [2019-10-02 14:40:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:19,867 INFO L225 Difference]: With dead ends: 142 [2019-10-02 14:40:19,868 INFO L226 Difference]: Without dead ends: 84 [2019-10-02 14:40:19,868 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-02 14:40:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-10-02 14:40:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-02 14:40:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2019-10-02 14:40:19,875 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 144 [2019-10-02 14:40:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:19,875 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2019-10-02 14:40:19,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:40:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2019-10-02 14:40:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-02 14:40:19,877 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:19,877 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 8, 8, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:19,878 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:19,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -781775014, now seen corresponding path program 20 times [2019-10-02 14:40:19,878 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:19,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:19,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:19,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:19,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:19,907 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:19,907 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:19,907 INFO L224 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 [2019-10-02 14:40:19,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:40:20,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:40:20,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:20,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-02 14:40:20,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-02 14:40:20,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:20,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 14:40:20,129 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 14:40:20,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 14:40:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:40:20,131 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 11 states. [2019-10-02 14:40:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:20,175 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2019-10-02 14:40:20,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 14:40:20,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 146 [2019-10-02 14:40:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:20,177 INFO L225 Difference]: With dead ends: 144 [2019-10-02 14:40:20,177 INFO L226 Difference]: Without dead ends: 86 [2019-10-02 14:40:20,178 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:40:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-02 14:40:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-02 14:40:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-02 14:40:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2019-10-02 14:40:20,187 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 146 [2019-10-02 14:40:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:20,187 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2019-10-02 14:40:20,187 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 14:40:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2019-10-02 14:40:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-02 14:40:20,188 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:20,188 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:20,189 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash -529222500, now seen corresponding path program 21 times [2019-10-02 14:40:20,189 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:20,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:20,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:20,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,209 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:20,209 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:20,210 INFO L224 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 [2019-10-02 14:40:20,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:40:20,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-02 14:40:20,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:20,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:40:20,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 532 proven. 36 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2019-10-02 14:40:20,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:20,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:40:20,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:40:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:40:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:20,491 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 9 states. [2019-10-02 14:40:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:20,520 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2019-10-02 14:40:20,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:40:20,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 148 [2019-10-02 14:40:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:20,522 INFO L225 Difference]: With dead ends: 126 [2019-10-02 14:40:20,522 INFO L226 Difference]: Without dead ends: 88 [2019-10-02 14:40:20,523 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-02 14:40:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-10-02 14:40:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-02 14:40:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2019-10-02 14:40:20,528 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 148 [2019-10-02 14:40:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:20,528 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2019-10-02 14:40:20,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:40:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2019-10-02 14:40:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-02 14:40:20,529 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:20,530 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:20,530 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash -159875010, now seen corresponding path program 22 times [2019-10-02 14:40:20,530 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:20,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:20,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:20,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:20,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:20,542 INFO L224 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 [2019-10-02 14:40:20,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:40:20,614 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:40:20,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:20,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 14:40:20,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 329 proven. 26 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2019-10-02 14:40:20,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:20,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 14:40:20,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 14:40:20,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 14:40:20,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:40:20,678 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 7 states. [2019-10-02 14:40:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:20,712 INFO L93 Difference]: Finished difference Result 147 states and 169 transitions. [2019-10-02 14:40:20,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 14:40:20,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2019-10-02 14:40:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:20,714 INFO L225 Difference]: With dead ends: 147 [2019-10-02 14:40:20,714 INFO L226 Difference]: Without dead ends: 91 [2019-10-02 14:40:20,714 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 14:40:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-02 14:40:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2019-10-02 14:40:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-02 14:40:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2019-10-02 14:40:20,720 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 150 [2019-10-02 14:40:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:20,721 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2019-10-02 14:40:20,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 14:40:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2019-10-02 14:40:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-02 14:40:20,722 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:20,723 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:20,723 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:20,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:20,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1229976214, now seen corresponding path program 23 times [2019-10-02 14:40:20,723 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:20,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:20,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:20,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,747 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:20,747 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:20,747 INFO L224 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 [2019-10-02 14:40:20,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:40:20,798 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-02 14:40:20,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:20,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:40:20,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 723 proven. 40 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2019-10-02 14:40:20,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:20,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:40:20,875 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:40:20,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:40:20,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:20,875 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 9 states. [2019-10-02 14:40:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:20,938 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2019-10-02 14:40:20,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:40:20,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 159 [2019-10-02 14:40:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:20,940 INFO L225 Difference]: With dead ends: 154 [2019-10-02 14:40:20,940 INFO L226 Difference]: Without dead ends: 95 [2019-10-02 14:40:20,941 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-02 14:40:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-10-02 14:40:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-02 14:40:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2019-10-02 14:40:20,945 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 159 [2019-10-02 14:40:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:20,945 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2019-10-02 14:40:20,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:40:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2019-10-02 14:40:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-02 14:40:20,947 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:20,947 INFO L411 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:20,947 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1357439492, now seen corresponding path program 24 times [2019-10-02 14:40:20,948 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:20,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:20,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:20,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:20,962 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:20,962 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:20,962 INFO L224 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 [2019-10-02 14:40:20,988 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:40:21,966 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-02 14:40:21,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:21,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-02 14:40:21,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 780 proven. 49 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2019-10-02 14:40:22,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:22,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:40:22,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:40:22,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:40:22,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:22,059 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 10 states. [2019-10-02 14:40:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:22,096 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2019-10-02 14:40:22,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:40:22,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 168 [2019-10-02 14:40:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:22,098 INFO L225 Difference]: With dead ends: 140 [2019-10-02 14:40:22,098 INFO L226 Difference]: Without dead ends: 96 [2019-10-02 14:40:22,099 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-02 14:40:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-10-02 14:40:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-02 14:40:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2019-10-02 14:40:22,104 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 168 [2019-10-02 14:40:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:22,104 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2019-10-02 14:40:22,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:40:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2019-10-02 14:40:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-02 14:40:22,105 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:22,105 INFO L411 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 9, 9, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:22,106 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash -859571546, now seen corresponding path program 25 times [2019-10-02 14:40:22,106 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:22,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:22,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:22,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:22,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:22,119 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:22,119 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:22,120 INFO L224 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 [2019-10-02 14:40:22,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:40:22,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-02 14:40:22,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1843 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-10-02 14:40:22,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:22,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 14:40:22,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 14:40:22,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 14:40:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:22,302 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 12 states. [2019-10-02 14:40:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:22,342 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2019-10-02 14:40:22,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 14:40:22,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 170 [2019-10-02 14:40:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:22,347 INFO L225 Difference]: With dead ends: 166 [2019-10-02 14:40:22,347 INFO L226 Difference]: Without dead ends: 98 [2019-10-02 14:40:22,348 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-02 14:40:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-02 14:40:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-02 14:40:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2019-10-02 14:40:22,353 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 170 [2019-10-02 14:40:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:22,353 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2019-10-02 14:40:22,353 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 14:40:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2019-10-02 14:40:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-02 14:40:22,354 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:22,355 INFO L411 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:22,355 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:22,355 INFO L82 PathProgramCache]: Analyzing trace with hash -85558808, now seen corresponding path program 26 times [2019-10-02 14:40:22,355 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:22,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:22,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:22,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:22,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:22,369 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:22,370 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:22,370 INFO L224 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 [2019-10-02 14:40:22,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:40:22,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:40:22,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:22,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 14:40:22,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-10-02 14:40:22,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:22,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 14:40:22,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 14:40:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 14:40:22,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:22,601 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 13 states. [2019-10-02 14:40:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:22,642 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2019-10-02 14:40:22,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 14:40:22,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 172 [2019-10-02 14:40:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:22,647 INFO L225 Difference]: With dead ends: 168 [2019-10-02 14:40:22,647 INFO L226 Difference]: Without dead ends: 100 [2019-10-02 14:40:22,648 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-02 14:40:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-02 14:40:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-02 14:40:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2019-10-02 14:40:22,654 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 172 [2019-10-02 14:40:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:22,654 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2019-10-02 14:40:22,654 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 14:40:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2019-10-02 14:40:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-02 14:40:22,656 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:22,656 INFO L411 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 11, 11, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:22,656 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:22,657 INFO L82 PathProgramCache]: Analyzing trace with hash 711340202, now seen corresponding path program 27 times [2019-10-02 14:40:22,657 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:22,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:22,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:22,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:22,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:22,671 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:22,671 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:22,671 INFO L224 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) [2019-10-02 14:40:22,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:23,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-02 14:40:23,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:23,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-02 14:40:23,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 780 proven. 64 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-02 14:40:23,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:23,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 14:40:23,124 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 14:40:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 14:40:23,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:40:23,124 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand 11 states. [2019-10-02 14:40:23,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:23,170 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2019-10-02 14:40:23,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 14:40:23,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 174 [2019-10-02 14:40:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:23,176 INFO L225 Difference]: With dead ends: 146 [2019-10-02 14:40:23,176 INFO L226 Difference]: Without dead ends: 102 [2019-10-02 14:40:23,179 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:40:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-02 14:40:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-10-02 14:40:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-02 14:40:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2019-10-02 14:40:23,189 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 174 [2019-10-02 14:40:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:23,189 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2019-10-02 14:40:23,189 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 14:40:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2019-10-02 14:40:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-02 14:40:23,193 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:23,194 INFO L411 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:23,194 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1009268684, now seen corresponding path program 28 times [2019-10-02 14:40:23,194 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:23,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:23,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:23,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:23,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:23,208 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:23,208 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:23,208 INFO L224 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 [2019-10-02 14:40:23,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:40:23,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:40:23,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:23,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 14:40:23,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 484 proven. 40 refuted. 0 times theorem prover too weak. 1376 trivial. 0 not checked. [2019-10-02 14:40:23,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:23,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 14:40:23,359 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 14:40:23,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 14:40:23,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:23,360 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 8 states. [2019-10-02 14:40:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:23,393 INFO L93 Difference]: Finished difference Result 171 states and 195 transitions. [2019-10-02 14:40:23,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 14:40:23,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 176 [2019-10-02 14:40:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:23,395 INFO L225 Difference]: With dead ends: 171 [2019-10-02 14:40:23,395 INFO L226 Difference]: Without dead ends: 105 [2019-10-02 14:40:23,396 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 14:40:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-02 14:40:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-10-02 14:40:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-02 14:40:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2019-10-02 14:40:23,400 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 176 [2019-10-02 14:40:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:23,400 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2019-10-02 14:40:23,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 14:40:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2019-10-02 14:40:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-02 14:40:23,402 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:23,402 INFO L411 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:23,402 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2091872432, now seen corresponding path program 29 times [2019-10-02 14:40:23,403 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:23,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:23,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:23,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:23,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:23,416 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:23,416 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:23,416 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:23,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:40:23,478 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-02 14:40:23,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:23,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 14:40:23,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2215 backedges. 1029 proven. 57 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2019-10-02 14:40:23,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:23,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:40:23,558 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:40:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:40:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:23,559 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 10 states. [2019-10-02 14:40:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:23,618 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2019-10-02 14:40:23,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:40:23,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 185 [2019-10-02 14:40:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:23,619 INFO L225 Difference]: With dead ends: 178 [2019-10-02 14:40:23,620 INFO L226 Difference]: Without dead ends: 109 [2019-10-02 14:40:23,620 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-02 14:40:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-10-02 14:40:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-02 14:40:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2019-10-02 14:40:23,625 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 185 [2019-10-02 14:40:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:23,625 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2019-10-02 14:40:23,626 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:40:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2019-10-02 14:40:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-02 14:40:23,627 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:23,627 INFO L411 BasicCegarLoop]: trace histogram [39, 39, 21, 18, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:23,627 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1416794042, now seen corresponding path program 30 times [2019-10-02 14:40:23,628 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:23,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:23,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:23,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:23,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:23,642 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:23,642 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:23,642 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:23,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:40:27,371 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-10-02 14:40:27,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:27,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-02 14:40:27,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 1221 proven. 77 refuted. 0 times theorem prover too weak. 1259 trivial. 0 not checked. [2019-10-02 14:40:27,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:27,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 14:40:27,515 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 14:40:27,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 14:40:27,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:27,515 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 13 states. [2019-10-02 14:40:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:27,578 INFO L93 Difference]: Finished difference Result 184 states and 212 transitions. [2019-10-02 14:40:27,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 14:40:27,579 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 194 [2019-10-02 14:40:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:27,580 INFO L225 Difference]: With dead ends: 184 [2019-10-02 14:40:27,580 INFO L226 Difference]: Without dead ends: 112 [2019-10-02 14:40:27,581 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-02 14:40:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2019-10-02 14:40:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-02 14:40:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2019-10-02 14:40:27,586 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 194 [2019-10-02 14:40:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:27,586 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2019-10-02 14:40:27,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 14:40:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2019-10-02 14:40:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-02 14:40:27,587 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:27,588 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 24, 18, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:27,588 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1578908176, now seen corresponding path program 31 times [2019-10-02 14:40:27,588 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:27,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:27,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:27,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:27,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:27,602 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:27,602 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:27,602 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:27,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:40:27,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-02 14:40:27,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:40:27,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:27,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 14:40:27,904 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 14:40:27,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 14:40:27,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:40:27,904 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 14 states. [2019-10-02 14:40:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:27,946 INFO L93 Difference]: Finished difference Result 192 states and 218 transitions. [2019-10-02 14:40:27,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 14:40:27,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 203 [2019-10-02 14:40:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:27,948 INFO L225 Difference]: With dead ends: 192 [2019-10-02 14:40:27,949 INFO L226 Difference]: Without dead ends: 113 [2019-10-02 14:40:27,949 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:40:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-02 14:40:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-10-02 14:40:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-02 14:40:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2019-10-02 14:40:27,956 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 203 [2019-10-02 14:40:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:27,956 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2019-10-02 14:40:27,956 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 14:40:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2019-10-02 14:40:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-02 14:40:27,958 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:27,958 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 24, 18, 12, 12, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:27,959 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2135545074, now seen corresponding path program 32 times [2019-10-02 14:40:27,959 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:27,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:27,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:27,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:27,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:27,984 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:27,984 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:27,985 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:28,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:40:28,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:40:28,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:28,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-02 14:40:28,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2949 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2019-10-02 14:40:28,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:28,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 14:40:28,248 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 14:40:28,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 14:40:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:40:28,249 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 15 states. [2019-10-02 14:40:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:28,329 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2019-10-02 14:40:28,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 14:40:28,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 205 [2019-10-02 14:40:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:28,331 INFO L225 Difference]: With dead ends: 194 [2019-10-02 14:40:28,331 INFO L226 Difference]: Without dead ends: 115 [2019-10-02 14:40:28,334 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:40:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-02 14:40:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-02 14:40:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-02 14:40:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2019-10-02 14:40:28,341 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 205 [2019-10-02 14:40:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:28,341 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2019-10-02 14:40:28,344 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 14:40:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2019-10-02 14:40:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-02 14:40:28,347 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:28,347 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 24, 18, 13, 13, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:28,348 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1687671948, now seen corresponding path program 33 times [2019-10-02 14:40:28,348 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:28,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:28,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:28,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:28,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:28,365 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:28,366 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:28,366 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:28,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:40:31,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-02 14:40:31,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:31,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-02 14:40:31,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2974 backedges. 1242 proven. 81 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2019-10-02 14:40:32,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:32,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 14:40:32,051 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 14:40:32,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 14:40:32,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:32,052 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 12 states. [2019-10-02 14:40:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:32,085 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2019-10-02 14:40:32,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 14:40:32,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 207 [2019-10-02 14:40:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:32,087 INFO L225 Difference]: With dead ends: 170 [2019-10-02 14:40:32,087 INFO L226 Difference]: Without dead ends: 117 [2019-10-02 14:40:32,088 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-02 14:40:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-10-02 14:40:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-02 14:40:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2019-10-02 14:40:32,094 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 207 [2019-10-02 14:40:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:32,094 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2019-10-02 14:40:32,094 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 14:40:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2019-10-02 14:40:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-02 14:40:32,096 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:32,096 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 24, 18, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:32,096 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2111552726, now seen corresponding path program 34 times [2019-10-02 14:40:32,097 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:32,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:32,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:32,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:32,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:32,120 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:32,120 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:32,120 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:32,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:40:32,210 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:40:32,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:32,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-02 14:40:32,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 729 proven. 57 refuted. 0 times theorem prover too weak. 2207 trivial. 0 not checked. [2019-10-02 14:40:32,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:32,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 14:40:32,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 14:40:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 14:40:32,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:32,334 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 9 states. [2019-10-02 14:40:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:32,385 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2019-10-02 14:40:32,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 14:40:32,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 209 [2019-10-02 14:40:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:32,387 INFO L225 Difference]: With dead ends: 197 [2019-10-02 14:40:32,387 INFO L226 Difference]: Without dead ends: 120 [2019-10-02 14:40:32,389 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 14:40:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-02 14:40:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-10-02 14:40:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-02 14:40:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2019-10-02 14:40:32,401 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 209 [2019-10-02 14:40:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:32,402 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2019-10-02 14:40:32,402 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 14:40:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2019-10-02 14:40:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-02 14:40:32,405 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:32,405 INFO L411 BasicCegarLoop]: trace histogram [45, 45, 24, 21, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:32,405 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:32,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1262174770, now seen corresponding path program 35 times [2019-10-02 14:40:32,406 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:32,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:32,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:32,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:32,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:32,429 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:32,429 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:32,429 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:32,467 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:40:32,539 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-02 14:40:32,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:32,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-02 14:40:32,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3389 backedges. 1587 proven. 100 refuted. 0 times theorem prover too weak. 1702 trivial. 0 not checked. [2019-10-02 14:40:32,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:32,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 14:40:32,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 14:40:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 14:40:32,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:32,707 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 12 states. [2019-10-02 14:40:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:32,794 INFO L93 Difference]: Finished difference Result 202 states and 231 transitions. [2019-10-02 14:40:32,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 14:40:32,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 218 [2019-10-02 14:40:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:32,796 INFO L225 Difference]: With dead ends: 202 [2019-10-02 14:40:32,796 INFO L226 Difference]: Without dead ends: 122 [2019-10-02 14:40:32,797 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-02 14:40:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2019-10-02 14:40:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-10-02 14:40:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2019-10-02 14:40:32,803 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 218 [2019-10-02 14:40:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:32,804 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2019-10-02 14:40:32,804 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 14:40:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2019-10-02 14:40:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-02 14:40:32,805 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:32,805 INFO L411 BasicCegarLoop]: trace histogram [48, 48, 27, 21, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:32,806 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1368768232, now seen corresponding path program 36 times [2019-10-02 14:40:32,806 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:32,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:32,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:32,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:32,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:32,822 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:32,822 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:32,822 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:32,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:40:36,946 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-10-02 14:40:36,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:36,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 14:40:36,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3812 backedges. 1610 proven. 100 refuted. 0 times theorem prover too weak. 2102 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:40:37,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:37,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 14:40:37,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 14:40:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 14:40:37,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:37,101 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand 13 states. [2019-10-02 14:40:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:37,143 INFO L93 Difference]: Finished difference Result 184 states and 209 transitions. [2019-10-02 14:40:37,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 14:40:37,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 227 [2019-10-02 14:40:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:37,145 INFO L225 Difference]: With dead ends: 184 [2019-10-02 14:40:37,145 INFO L226 Difference]: Without dead ends: 125 [2019-10-02 14:40:37,145 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-02 14:40:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-10-02 14:40:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-02 14:40:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2019-10-02 14:40:37,151 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 227 [2019-10-02 14:40:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:37,152 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2019-10-02 14:40:37,152 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 14:40:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2019-10-02 14:40:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-02 14:40:37,153 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:37,153 INFO L411 BasicCegarLoop]: trace histogram [48, 48, 27, 21, 13, 13, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:37,154 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2102968198, now seen corresponding path program 37 times [2019-10-02 14:40:37,154 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:37,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:37,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:37,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:37,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:37,168 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:37,168 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:37,169 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:37,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:40:37,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-02 14:40:37,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3833 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 3664 trivial. 0 not checked. [2019-10-02 14:40:37,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:37,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-02 14:40:37,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 14:40:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 14:40:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:40:37,459 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand 16 states. [2019-10-02 14:40:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:37,515 INFO L93 Difference]: Finished difference Result 216 states and 244 transitions. [2019-10-02 14:40:37,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 14:40:37,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 229 [2019-10-02 14:40:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:37,519 INFO L225 Difference]: With dead ends: 216 [2019-10-02 14:40:37,519 INFO L226 Difference]: Without dead ends: 127 [2019-10-02 14:40:37,519 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:40:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-02 14:40:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-10-02 14:40:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-02 14:40:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2019-10-02 14:40:37,524 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 229 [2019-10-02 14:40:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:37,525 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2019-10-02 14:40:37,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-02 14:40:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2019-10-02 14:40:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-10-02 14:40:37,526 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:37,527 INFO L411 BasicCegarLoop]: trace histogram [48, 48, 27, 21, 14, 14, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:37,527 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:37,527 INFO L82 PathProgramCache]: Analyzing trace with hash 13979396, now seen corresponding path program 38 times [2019-10-02 14:40:37,528 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:37,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:37,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:37,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:37,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:37,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:37,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:37,542 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:37,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:40:37,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:40:37,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:37,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-02 14:40:37,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3860 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3664 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:40:37,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:37,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 14:40:37,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 14:40:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 14:40:37,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:40:37,896 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand 17 states. [2019-10-02 14:40:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:37,976 INFO L93 Difference]: Finished difference Result 218 states and 246 transitions. [2019-10-02 14:40:37,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 14:40:37,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 231 [2019-10-02 14:40:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:37,979 INFO L225 Difference]: With dead ends: 218 [2019-10-02 14:40:37,979 INFO L226 Difference]: Without dead ends: 129 [2019-10-02 14:40:37,980 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:40:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-02 14:40:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-10-02 14:40:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-02 14:40:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2019-10-02 14:40:37,994 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 231 [2019-10-02 14:40:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:37,995 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2019-10-02 14:40:37,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 14:40:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2019-10-02 14:40:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-02 14:40:37,997 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:37,998 INFO L411 BasicCegarLoop]: trace histogram [48, 48, 27, 21, 15, 15, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:37,998 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1754532094, now seen corresponding path program 39 times [2019-10-02 14:40:37,999 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:37,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:38,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:38,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:38,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:38,023 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:38,023 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:38,023 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:38,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:40:39,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-10-02 14:40:39,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:39,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-02 14:40:39,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3889 backedges. 1610 proven. 121 refuted. 0 times theorem prover too weak. 2158 trivial. 0 not checked. [2019-10-02 14:40:39,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:39,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 14:40:39,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 14:40:39,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 14:40:39,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:40:39,617 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 14 states. [2019-10-02 14:40:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:39,677 INFO L93 Difference]: Finished difference Result 190 states and 215 transitions. [2019-10-02 14:40:39,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 14:40:39,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 233 [2019-10-02 14:40:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:39,679 INFO L225 Difference]: With dead ends: 190 [2019-10-02 14:40:39,679 INFO L226 Difference]: Without dead ends: 131 [2019-10-02 14:40:39,680 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-02 14:40:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-02 14:40:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-10-02 14:40:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-02 14:40:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2019-10-02 14:40:39,685 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 233 [2019-10-02 14:40:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:39,685 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2019-10-02 14:40:39,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 14:40:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2019-10-02 14:40:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-02 14:40:39,687 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:39,687 INFO L411 BasicCegarLoop]: trace histogram [48, 48, 27, 21, 15, 15, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:39,687 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:39,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1501472480, now seen corresponding path program 40 times [2019-10-02 14:40:39,688 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:39,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:39,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:39,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:39,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:39,702 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:39,703 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:39,703 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:39,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:40:39,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:40:39,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:39,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 14:40:39,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3912 backedges. 953 proven. 77 refuted. 0 times theorem prover too weak. 2882 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:40:39,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:39,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 14:40:39,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 14:40:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 14:40:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:39,931 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand 10 states. [2019-10-02 14:40:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:39,973 INFO L93 Difference]: Finished difference Result 221 states and 251 transitions. [2019-10-02 14:40:39,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 14:40:39,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 235 [2019-10-02 14:40:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:39,974 INFO L225 Difference]: With dead ends: 221 [2019-10-02 14:40:39,975 INFO L226 Difference]: Without dead ends: 134 [2019-10-02 14:40:39,975 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 14:40:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-02 14:40:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-10-02 14:40:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-02 14:40:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2019-10-02 14:40:39,982 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 235 [2019-10-02 14:40:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:39,982 INFO L475 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2019-10-02 14:40:39,982 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 14:40:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2019-10-02 14:40:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-02 14:40:39,984 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:39,985 INFO L411 BasicCegarLoop]: trace histogram [51, 51, 27, 24, 15, 15, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:39,985 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1001970804, now seen corresponding path program 41 times [2019-10-02 14:40:39,985 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:39,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:39,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:40,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:40,012 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:40,012 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:40,056 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:40:40,155 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-10-02 14:40:40,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:40,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-02 14:40:40,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4362 backedges. 2488 proven. 100 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2019-10-02 14:40:40,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:40,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 14:40:40,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 14:40:40,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 14:40:40,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:40:40,273 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 11 states. [2019-10-02 14:40:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:40,317 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2019-10-02 14:40:40,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 14:40:40,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 244 [2019-10-02 14:40:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:40,319 INFO L225 Difference]: With dead ends: 227 [2019-10-02 14:40:40,319 INFO L226 Difference]: Without dead ends: 137 [2019-10-02 14:40:40,320 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-02 14:40:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-02 14:40:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-10-02 14:40:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-02 14:40:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2019-10-02 14:40:40,326 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 244 [2019-10-02 14:40:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:40,326 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2019-10-02 14:40:40,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 14:40:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2019-10-02 14:40:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-10-02 14:40:40,328 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:40,328 INFO L411 BasicCegarLoop]: trace histogram [54, 54, 27, 27, 15, 15, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:40,328 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash -905415520, now seen corresponding path program 42 times [2019-10-02 14:40:40,329 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:40,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:40,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:40,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:40,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:40,345 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:40,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:40,345 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:40,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:40:48,199 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-10-02 14:40:48,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:48,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-02 14:40:48,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 2026 proven. 144 refuted. 0 times theorem prover too weak. 2669 trivial. 0 not checked. [2019-10-02 14:40:48,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:48,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 14:40:48,374 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 14:40:48,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 14:40:48,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:40:48,375 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand 15 states. [2019-10-02 14:40:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:48,433 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2019-10-02 14:40:48,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 14:40:48,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 253 [2019-10-02 14:40:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:48,435 INFO L225 Difference]: With dead ends: 204 [2019-10-02 14:40:48,435 INFO L226 Difference]: Without dead ends: 139 [2019-10-02 14:40:48,436 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-02 14:40:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-02 14:40:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-10-02 14:40:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-02 14:40:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2019-10-02 14:40:48,441 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 253 [2019-10-02 14:40:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:48,441 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2019-10-02 14:40:48,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 14:40:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2019-10-02 14:40:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-02 14:40:48,443 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:48,443 INFO L411 BasicCegarLoop]: trace histogram [54, 54, 27, 27, 15, 15, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:48,443 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash -229672770, now seen corresponding path program 43 times [2019-10-02 14:40:48,444 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:48,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:48,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:48,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:48,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:48,459 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:48,460 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:48,460 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:48,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:40:48,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-02 14:40:48,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4864 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4639 trivial. 0 not checked. [2019-10-02 14:40:48,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:48,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 14:40:48,870 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 14:40:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 14:40:48,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:40:48,871 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand 18 states. [2019-10-02 14:40:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:48,944 INFO L93 Difference]: Finished difference Result 240 states and 268 transitions. [2019-10-02 14:40:48,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 14:40:48,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 255 [2019-10-02 14:40:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:48,946 INFO L225 Difference]: With dead ends: 240 [2019-10-02 14:40:48,946 INFO L226 Difference]: Without dead ends: 141 [2019-10-02 14:40:48,949 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:40:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-02 14:40:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-10-02 14:40:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-10-02 14:40:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2019-10-02 14:40:48,958 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 255 [2019-10-02 14:40:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:48,959 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2019-10-02 14:40:48,959 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 14:40:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2019-10-02 14:40:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-10-02 14:40:48,962 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:48,962 INFO L411 BasicCegarLoop]: trace histogram [54, 54, 27, 27, 16, 16, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:48,963 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:48,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1359840956, now seen corresponding path program 44 times [2019-10-02 14:40:48,964 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:48,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:48,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:48,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:40:48,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:48,992 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:48,992 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:48,993 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:49,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:40:49,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:40:49,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:49,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-02 14:40:49,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4895 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4639 trivial. 0 not checked. [2019-10-02 14:40:49,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:49,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 14:40:49,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 14:40:49,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 14:40:49,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:40:49,343 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand 19 states. [2019-10-02 14:40:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:49,400 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2019-10-02 14:40:49,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 14:40:49,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 257 [2019-10-02 14:40:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:49,402 INFO L225 Difference]: With dead ends: 242 [2019-10-02 14:40:49,402 INFO L226 Difference]: Without dead ends: 143 [2019-10-02 14:40:49,403 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-02 14:40:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-02 14:40:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-10-02 14:40:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-10-02 14:40:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2019-10-02 14:40:49,409 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 257 [2019-10-02 14:40:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:49,410 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2019-10-02 14:40:49,410 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 14:40:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2019-10-02 14:40:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-02 14:40:49,411 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:49,412 INFO L411 BasicCegarLoop]: trace histogram [54, 54, 27, 27, 17, 17, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:49,412 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash -125825734, now seen corresponding path program 45 times [2019-10-02 14:40:49,413 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:49,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:49,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:49,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:49,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:49,429 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:49,429 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:49,429 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:49,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:40:50,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-02 14:40:50,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:50,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-02 14:40:50,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4928 backedges. 2026 proven. 169 refuted. 0 times theorem prover too weak. 2733 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:40:50,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:50,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-02 14:40:50,777 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 14:40:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 14:40:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:40:50,777 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand 16 states. [2019-10-02 14:40:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:50,830 INFO L93 Difference]: Finished difference Result 210 states and 235 transitions. [2019-10-02 14:40:50,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 14:40:50,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 259 [2019-10-02 14:40:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:50,832 INFO L225 Difference]: With dead ends: 210 [2019-10-02 14:40:50,833 INFO L226 Difference]: Without dead ends: 145 [2019-10-02 14:40:50,833 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-02 14:40:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-10-02 14:40:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-10-02 14:40:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-02 14:40:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2019-10-02 14:40:50,839 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 259 [2019-10-02 14:40:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:50,840 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2019-10-02 14:40:50,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-02 14:40:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2019-10-02 14:40:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-02 14:40:50,842 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:50,842 INFO L411 BasicCegarLoop]: trace histogram [54, 54, 27, 27, 17, 17, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:50,842 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1631802072, now seen corresponding path program 46 times [2019-10-02 14:40:50,843 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:50,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:50,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:50,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:50,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:50,858 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:50,858 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:50,859 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:50,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:40:50,961 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:40:50,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:50,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-02 14:40:50,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4955 backedges. 1317 proven. 126 refuted. 0 times theorem prover too weak. 3512 trivial. 0 not checked. [2019-10-02 14:40:51,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:51,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 14:40:51,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 14:40:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 14:40:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:51,086 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 12 states. [2019-10-02 14:40:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:51,141 INFO L93 Difference]: Finished difference Result 245 states and 275 transitions. [2019-10-02 14:40:51,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 14:40:51,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 261 [2019-10-02 14:40:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:51,143 INFO L225 Difference]: With dead ends: 245 [2019-10-02 14:40:51,143 INFO L226 Difference]: Without dead ends: 148 [2019-10-02 14:40:51,144 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-02 14:40:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-02 14:40:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2019-10-02 14:40:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-02 14:40:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2019-10-02 14:40:51,150 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 261 [2019-10-02 14:40:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:51,150 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2019-10-02 14:40:51,150 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 14:40:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2019-10-02 14:40:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-02 14:40:51,152 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:51,152 INFO L411 BasicCegarLoop]: trace histogram [57, 57, 30, 27, 17, 17, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:51,152 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash -188404548, now seen corresponding path program 47 times [2019-10-02 14:40:51,153 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:51,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:51,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:51,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:51,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:51,168 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:51,168 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:51,168 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:51,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 14:40:51,343 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-10-02 14:40:51,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:40:51,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 14:40:51,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:40:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5459 backedges. 3148 proven. 155 refuted. 0 times theorem prover too weak. 2156 trivial. 0 not checked. [2019-10-02 14:40:51,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:40:51,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 14:40:51,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 14:40:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 14:40:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:51,465 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand 13 states. [2019-10-02 14:40:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:40:51,508 INFO L93 Difference]: Finished difference Result 250 states and 280 transitions. [2019-10-02 14:40:51,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 14:40:51,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 270 [2019-10-02 14:40:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:40:51,510 INFO L225 Difference]: With dead ends: 250 [2019-10-02 14:40:51,510 INFO L226 Difference]: Without dead ends: 150 [2019-10-02 14:40:51,511 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-02 14:40:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-02 14:40:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2019-10-02 14:40:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-02 14:40:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2019-10-02 14:40:51,516 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 270 [2019-10-02 14:40:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:40:51,516 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2019-10-02 14:40:51,517 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 14:40:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2019-10-02 14:40:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-10-02 14:40:51,518 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:40:51,519 INFO L411 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 17, 17, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:40:51,519 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:40:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:40:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1502664104, now seen corresponding path program 48 times [2019-10-02 14:40:51,519 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:40:51,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:40:51,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:51,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:40:51,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:40:51,533 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:40:51,533 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:40:51,533 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:40:51,570 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 14:41:00,595 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-02 14:41:00,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:41:00,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-02 14:41:00,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:41:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5990 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3304 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:41:00,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:41:00,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 14:41:00,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 14:41:00,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 14:41:00,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:41:00,959 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand 17 states. [2019-10-02 14:41:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:41:01,026 INFO L93 Difference]: Finished difference Result 224 states and 249 transitions. [2019-10-02 14:41:01,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 14:41:01,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 279 [2019-10-02 14:41:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:41:01,028 INFO L225 Difference]: With dead ends: 224 [2019-10-02 14:41:01,029 INFO L226 Difference]: Without dead ends: 153 [2019-10-02 14:41:01,030 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-02 14:41:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-02 14:41:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2019-10-02 14:41:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-02 14:41:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2019-10-02 14:41:01,039 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 279 [2019-10-02 14:41:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:41:01,039 INFO L475 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2019-10-02 14:41:01,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 14:41:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2019-10-02 14:41:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-02 14:41:01,041 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:41:01,042 INFO L411 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 17, 17, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:41:01,042 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:41:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:41:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash -848883210, now seen corresponding path program 49 times [2019-10-02 14:41:01,042 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:41:01,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:41:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:01,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:41:01,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:01,058 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:41:01,058 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:41:01,058 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:41:01,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:41:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 14:41:01,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-02 14:41:01,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:41:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6019 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5730 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:41:01,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:41:01,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-02 14:41:01,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-02 14:41:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-02 14:41:01,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:41:01,415 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand 20 states. [2019-10-02 14:41:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:41:01,476 INFO L93 Difference]: Finished difference Result 264 states and 292 transitions. [2019-10-02 14:41:01,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-02 14:41:01,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 281 [2019-10-02 14:41:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:41:01,477 INFO L225 Difference]: With dead ends: 264 [2019-10-02 14:41:01,477 INFO L226 Difference]: Without dead ends: 155 [2019-10-02 14:41:01,478 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-02 14:41:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-10-02 14:41:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-10-02 14:41:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-10-02 14:41:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2019-10-02 14:41:01,483 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 281 [2019-10-02 14:41:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:41:01,484 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2019-10-02 14:41:01,484 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-02 14:41:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2019-10-02 14:41:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-10-02 14:41:01,486 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:41:01,486 INFO L411 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 18, 18, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:41:01,486 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:41:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:41:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash 384663156, now seen corresponding path program 50 times [2019-10-02 14:41:01,487 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:41:01,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:41:01,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:01,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 14:41:01,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:01,501 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:41:01,502 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:41:01,502 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:41:01,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 14:41:01,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 14:41:01,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:41:01,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-02 14:41:01,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:41:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6054 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5730 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 14:41:01,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:41:01,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-02 14:41:01,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-02 14:41:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-02 14:41:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-02 14:41:01,900 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand 21 states. [2019-10-02 14:41:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:41:01,970 INFO L93 Difference]: Finished difference Result 266 states and 294 transitions. [2019-10-02 14:41:01,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-02 14:41:01,971 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 283 [2019-10-02 14:41:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:41:01,972 INFO L225 Difference]: With dead ends: 266 [2019-10-02 14:41:01,972 INFO L226 Difference]: Without dead ends: 157 [2019-10-02 14:41:01,973 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-02 14:41:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-02 14:41:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2019-10-02 14:41:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-02 14:41:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 170 transitions. [2019-10-02 14:41:01,979 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 170 transitions. Word has length 283 [2019-10-02 14:41:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:41:01,979 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 170 transitions. [2019-10-02 14:41:01,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-02 14:41:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 170 transitions. [2019-10-02 14:41:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-02 14:41:01,981 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:41:01,982 INFO L411 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 19, 19, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:41:01,982 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:41:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:41:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash 411747186, now seen corresponding path program 51 times [2019-10-02 14:41:01,982 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:41:01,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:41:01,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:01,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:41:01,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:02,008 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:41:02,008 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:41:02,008 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:41:02,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 14:41:04,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-10-02 14:41:04,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:41:04,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-02 14:41:04,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:41:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 2490 proven. 225 refuted. 0 times theorem prover too weak. 3376 trivial. 0 not checked. [2019-10-02 14:41:04,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:41:04,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 14:41:04,795 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 14:41:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 14:41:04,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:41:04,796 INFO L87 Difference]: Start difference. First operand 156 states and 170 transitions. Second operand 18 states. [2019-10-02 14:41:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:41:04,867 INFO L93 Difference]: Finished difference Result 230 states and 255 transitions. [2019-10-02 14:41:04,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 14:41:04,867 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 285 [2019-10-02 14:41:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:41:04,869 INFO L225 Difference]: With dead ends: 230 [2019-10-02 14:41:04,869 INFO L226 Difference]: Without dead ends: 159 [2019-10-02 14:41:04,869 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-02 14:41:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-02 14:41:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2019-10-02 14:41:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-02 14:41:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 172 transitions. [2019-10-02 14:41:04,875 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 172 transitions. Word has length 285 [2019-10-02 14:41:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:41:04,875 INFO L475 AbstractCegarLoop]: Abstraction has 158 states and 172 transitions. [2019-10-02 14:41:04,876 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 14:41:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 172 transitions. [2019-10-02 14:41:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-02 14:41:04,877 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:41:04,878 INFO L411 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 19, 19, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:41:04,878 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:41:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:41:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 654363792, now seen corresponding path program 52 times [2019-10-02 14:41:04,879 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:41:04,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:41:04,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:04,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:41:04,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:04,894 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:41:04,895 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:41:04,895 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:41:04,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 14:41:05,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 14:41:05,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 14:41:05,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-02 14:41:05,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 14:41:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6122 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5761 trivial. 0 not checked. [2019-10-02 14:41:05,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 14:41:05,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-02 14:41:05,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-02 14:41:05,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-02 14:41:05,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-02 14:41:05,346 INFO L87 Difference]: Start difference. First operand 158 states and 172 transitions. Second operand 22 states. [2019-10-02 14:41:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 14:41:05,412 INFO L93 Difference]: Finished difference Result 271 states and 299 transitions. [2019-10-02 14:41:05,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-02 14:41:05,412 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 287 [2019-10-02 14:41:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 14:41:05,413 INFO L225 Difference]: With dead ends: 271 [2019-10-02 14:41:05,413 INFO L226 Difference]: Without dead ends: 160 [2019-10-02 14:41:05,415 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-02 14:41:05,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-02 14:41:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2019-10-02 14:41:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-10-02 14:41:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 174 transitions. [2019-10-02 14:41:05,420 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 174 transitions. Word has length 287 [2019-10-02 14:41:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 14:41:05,421 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 174 transitions. [2019-10-02 14:41:05,421 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-02 14:41:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 174 transitions. [2019-10-02 14:41:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2019-10-02 14:41:05,423 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 14:41:05,423 INFO L411 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 20, 20, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 14:41:05,423 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 14:41:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 14:41:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash -564698482, now seen corresponding path program 53 times [2019-10-02 14:41:05,424 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 14:41:05,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 14:41:05,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:05,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 14:41:05,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 14:41:05,439 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 14:41:05,439 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 14:41:05,439 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 14:41:05,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1