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/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:06:57,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:06:57,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:06:57,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 03:06:57,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 03:06:57,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 03:06:57,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 03:06:57,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 03:06:57,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 03:06:57,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 03:06:57,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 03:06:57,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 03:06:57,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 03:06:57,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 03:06:57,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 03:06:57,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 03:06:57,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 03:06:57,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 03:06:57,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 03:06:57,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 03:06:57,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 03:06:57,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 03:06:57,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 03:06:57,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 03:06:57,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 03:06:57,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-08 03:06:57,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-08 03:06:57,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-08 03:06:57,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-08 03:06:57,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-08 03:06:57,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-08 03:06:57,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-08 03:06:57,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-08 03:06:57,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:06:57,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:06:57,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:06:57,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 03:06:57,223 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:06:57,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:06:57,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:06:57,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:06:57,225 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:06:57,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:06:57,225 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:06:57,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:06:57,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:06:57,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:06:57,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:06:57,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:06:57,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:06:57,226 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:06:57,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:06:57,227 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:06:57,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:06:57,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:06:57,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:06:57,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:06:57,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:06:57,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:06:57,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:06:57,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:06:57,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:06:57,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:06:57,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:06:57,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:06:57,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:06:57,257 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:06:57,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:06:57,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:06:57,276 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:06:57,277 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:06:57,277 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-08 03:06:57,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6b33df1c/d12c9f44b5c94f54bdfba4edf2e198f9/FLAG66c06dbad [2019-09-08 03:06:57,811 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:06:57,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-08 03:06:57,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6b33df1c/d12c9f44b5c94f54bdfba4edf2e198f9/FLAG66c06dbad [2019-09-08 03:06:58,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6b33df1c/d12c9f44b5c94f54bdfba4edf2e198f9 [2019-09-08 03:06:58,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:06:58,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:06:58,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:06:58,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:06:58,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:06:58,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc70eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58, skipping insertion in model container [2019-09-08 03:06:58,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,260 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:06:58,277 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:06:58,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:06:58,456 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:06:58,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:06:58,483 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:06:58,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58 WrapperNode [2019-09-08 03:06:58,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:06:58,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:06:58,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:06:58,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:06:58,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... [2019-09-08 03:06:58,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:06:58,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:06:58,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:06:58,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:06:58,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:06:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:06:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:06:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:06:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:06:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-08 03:06:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:06:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 03:06:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:06:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:06:58,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:06:58,796 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:06:58,796 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 03:06:58,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:06:58 BoogieIcfgContainer [2019-09-08 03:06:58,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:06:58,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:06:58,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:06:58,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:06:58,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:06:58" (1/3) ... [2019-09-08 03:06:58,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d4ee3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:06:58, skipping insertion in model container [2019-09-08 03:06:58,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:58" (2/3) ... [2019-09-08 03:06:58,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d4ee3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:06:58, skipping insertion in model container [2019-09-08 03:06:58,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:06:58" (3/3) ... [2019-09-08 03:06:58,805 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-09-08 03:06:58,815 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:06:58,821 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:06:58,836 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:06:58,871 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:06:58,872 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:06:58,872 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:06:58,872 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:06:58,874 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:06:58,875 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:06:58,875 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:06:58,875 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:06:58,875 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:06:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-08 03:06:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-08 03:06:58,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:58,910 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:58,911 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:58,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:58,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-08 03:06:58,917 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:58,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:58,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:58,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:58,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:58,987 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:58,987 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:58,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:59,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:59,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-08 03:06:59,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:06:59,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:06:59,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-08 03:06:59,103 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-08 03:06:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-08 03:06:59,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-08 03:06:59,132 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-08 03:06:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:59,244 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-08 03:06:59,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-08 03:06:59,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-08 03:06:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:59,253 INFO L225 Difference]: With dead ends: 26 [2019-09-08 03:06:59,254 INFO L226 Difference]: Without dead ends: 13 [2019-09-08 03:06:59,257 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-08 03:06:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-08 03:06:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-08 03:06:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-08 03:06:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-08 03:06:59,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-08 03:06:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:59,288 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-08 03:06:59,288 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-08 03:06:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-08 03:06:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-08 03:06:59,289 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:59,289 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:59,290 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:59,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:59,290 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-08 03:06:59,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:59,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:59,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:59,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,301 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:59,302 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:59,302 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:59,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:59,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:06:59,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:59,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:59,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:59,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-08 03:06:59,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 03:06:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 03:06:59,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:06:59,426 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-08 03:06:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:59,497 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-08 03:06:59,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 03:06:59,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-08 03:06:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:59,499 INFO L225 Difference]: With dead ends: 17 [2019-09-08 03:06:59,499 INFO L226 Difference]: Without dead ends: 14 [2019-09-08 03:06:59,500 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:06:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-08 03:06:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-08 03:06:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-08 03:06:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-08 03:06:59,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-08 03:06:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:59,506 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-08 03:06:59,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 03:06:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-08 03:06:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 03:06:59,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:59,507 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:59,508 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:59,508 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-08 03:06:59,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:59,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,523 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:59,524 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:59,524 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:59,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:59,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:59,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:59,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 03:06:59,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:59,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:06:59,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:59,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-08 03:06:59,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 03:06:59,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 03:06:59,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:06:59,647 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-09-08 03:06:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:59,716 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-08 03:06:59,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 03:06:59,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-08 03:06:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:59,717 INFO L225 Difference]: With dead ends: 18 [2019-09-08 03:06:59,718 INFO L226 Difference]: Without dead ends: 15 [2019-09-08 03:06:59,718 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:06:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-08 03:06:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-08 03:06:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-08 03:06:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-08 03:06:59,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-08 03:06:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:59,730 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-08 03:06:59,730 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 03:06:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-08 03:06:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 03:06:59,731 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:59,731 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:59,731 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-09-08 03:06:59,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:59,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:59,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,761 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:59,762 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:59,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:59,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:06:59,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-08 03:06:59,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:59,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-08 03:06:59,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:59,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:59,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:59,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-08 03:06:59,884 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 03:06:59,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 03:06:59,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:06:59,885 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-09-08 03:06:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:59,947 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-08 03:06:59,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 03:06:59,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-08 03:06:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:59,949 INFO L225 Difference]: With dead ends: 19 [2019-09-08 03:06:59,949 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 03:06:59,949 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:06:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 03:06:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-08 03:06:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-08 03:06:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-08 03:06:59,954 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-08 03:06:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:59,954 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-08 03:06:59,954 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 03:06:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-08 03:06:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-08 03:06:59,955 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:59,956 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:59,956 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:59,956 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-09-08 03:06:59,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:59,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:59,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:59,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:59,968 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:59,968 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:59,968 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:59,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:00,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:00,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:00,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-08 03:07:00,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:00,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:00,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:00,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-08 03:07:00,145 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 03:07:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 03:07:00,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-08 03:07:00,146 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-09-08 03:07:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:00,230 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-08 03:07:00,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 03:07:00,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-08 03:07:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:00,231 INFO L225 Difference]: With dead ends: 20 [2019-09-08 03:07:00,232 INFO L226 Difference]: Without dead ends: 17 [2019-09-08 03:07:00,232 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:07:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-08 03:07:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-08 03:07:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-08 03:07:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-08 03:07:00,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-08 03:07:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:00,243 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-08 03:07:00,243 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 03:07:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-08 03:07:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-08 03:07:00,247 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:00,247 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:00,248 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:00,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-09-08 03:07:00,248 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:00,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:00,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:00,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,272 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:00,272 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:00,272 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:00,294 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:07:00,313 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-08 03:07:00,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:00,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-08 03:07:00,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:00,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:00,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:00,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-08 03:07:00,412 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 03:07:00,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 03:07:00,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:07:00,413 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-09-08 03:07:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:00,557 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-08 03:07:00,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:07:00,557 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-08 03:07:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:00,558 INFO L225 Difference]: With dead ends: 21 [2019-09-08 03:07:00,558 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 03:07:00,559 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:07:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 03:07:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 03:07:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 03:07:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-08 03:07:00,563 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-08 03:07:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:00,564 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-08 03:07:00,564 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 03:07:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-08 03:07:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-08 03:07:00,565 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:00,565 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:00,565 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:00,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-09-08 03:07:00,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:00,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:00,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:00,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,581 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:00,583 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:00,583 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:00,611 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:00,633 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-08 03:07:00,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:00,635 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-08 03:07:00,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:00,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:00,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:00,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-08 03:07:00,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:07:00,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:07:00,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:07:00,761 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-08 03:07:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:00,863 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-08 03:07:00,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 03:07:00,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-08 03:07:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:00,864 INFO L225 Difference]: With dead ends: 22 [2019-09-08 03:07:00,864 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 03:07:00,865 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:07:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 03:07:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-08 03:07:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-08 03:07:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-08 03:07:00,869 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-08 03:07:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:00,870 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-08 03:07:00,870 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:07:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-08 03:07:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-08 03:07:00,871 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:00,871 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:00,871 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-09-08 03:07:00,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:00,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:00,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:00,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,883 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:00,883 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:00,883 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:00,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:00,918 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-08 03:07:00,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:01,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:01,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:01,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-08 03:07:01,070 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:07:01,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:07:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:07:01,072 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-08 03:07:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:01,185 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-08 03:07:01,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 03:07:01,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-08 03:07:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:01,186 INFO L225 Difference]: With dead ends: 23 [2019-09-08 03:07:01,186 INFO L226 Difference]: Without dead ends: 20 [2019-09-08 03:07:01,187 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:07:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-08 03:07:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-08 03:07:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-08 03:07:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-08 03:07:01,192 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-08 03:07:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:01,192 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-08 03:07:01,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:07:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-08 03:07:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 03:07:01,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:01,194 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:01,194 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-09-08 03:07:01,195 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:01,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:01,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:01,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,206 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:01,206 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:01,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:01,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:01,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:01,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:01,246 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-08 03:07:01,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:01,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:01,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:01,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-08 03:07:01,413 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 03:07:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 03:07:01,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:07:01,415 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-08 03:07:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:01,578 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-08 03:07:01,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 03:07:01,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-08 03:07:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:01,580 INFO L225 Difference]: With dead ends: 24 [2019-09-08 03:07:01,580 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 03:07:01,581 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:07:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 03:07:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 03:07:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 03:07:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-08 03:07:01,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-08 03:07:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:01,589 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-08 03:07:01,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 03:07:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-08 03:07:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-08 03:07:01,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:01,592 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:01,592 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:01,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-09-08 03:07:01,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:01,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:01,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:01,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,615 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:01,615 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:01,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:01,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:01,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-08 03:07:01,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:01,661 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-08 03:07:01,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:01,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:01,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:01,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-08 03:07:01,818 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 03:07:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 03:07:01,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:07:01,818 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-08 03:07:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:01,942 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-08 03:07:01,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 03:07:01,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-08 03:07:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:01,943 INFO L225 Difference]: With dead ends: 25 [2019-09-08 03:07:01,943 INFO L226 Difference]: Without dead ends: 22 [2019-09-08 03:07:01,943 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:07:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-08 03:07:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-08 03:07:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-08 03:07:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-08 03:07:01,948 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-08 03:07:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:01,948 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-08 03:07:01,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 03:07:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-08 03:07:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-08 03:07:01,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:01,949 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:01,949 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-09-08 03:07:01,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:01,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:01,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:01,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,966 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:01,966 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:01,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:01,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:02,116 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:02,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:02,118 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-08 03:07:02,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:02,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:02,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:02,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-08 03:07:02,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 03:07:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 03:07:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:07:02,287 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-08 03:07:02,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:02,540 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-08 03:07:02,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 03:07:02,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-08 03:07:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:02,541 INFO L225 Difference]: With dead ends: 26 [2019-09-08 03:07:02,541 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 03:07:02,542 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:07:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 03:07:02,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 03:07:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 03:07:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-08 03:07:02,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-08 03:07:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:02,547 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-08 03:07:02,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 03:07:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-08 03:07:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-08 03:07:02,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:02,548 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:02,548 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:02,548 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-09-08 03:07:02,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:02,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:02,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:02,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:02,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:02,559 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:02,559 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:02,559 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:02,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:07:02,595 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-08 03:07:02,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:02,597 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-08 03:07:02,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:02,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:02,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:02,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-08 03:07:02,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 03:07:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 03:07:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:07:02,782 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-08 03:07:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:03,002 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-08 03:07:03,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 03:07:03,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-08 03:07:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:03,003 INFO L225 Difference]: With dead ends: 27 [2019-09-08 03:07:03,003 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 03:07:03,004 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:07:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 03:07:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 03:07:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 03:07:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-08 03:07:03,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-08 03:07:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:03,009 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-08 03:07:03,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 03:07:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-08 03:07:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-08 03:07:03,010 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:03,011 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:03,011 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-09-08 03:07:03,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:03,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:03,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:03,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:03,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:03,021 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:03,021 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:03,021 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:03,035 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:03,062 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 03:07:03,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:03,065 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-08 03:07:03,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:03,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:03,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:03,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-08 03:07:03,280 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 03:07:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 03:07:03,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:07:03,281 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-08 03:07:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:03,517 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-08 03:07:03,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 03:07:03,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-08 03:07:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:03,518 INFO L225 Difference]: With dead ends: 28 [2019-09-08 03:07:03,519 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 03:07:03,519 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:07:03,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 03:07:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-08 03:07:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-08 03:07:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-08 03:07:03,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-08 03:07:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:03,525 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-08 03:07:03,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 03:07:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-08 03:07:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-08 03:07:03,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:03,526 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:03,526 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-09-08 03:07:03,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:03,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:03,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:03,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:03,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:03,537 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:03,537 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:03,537 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:03,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:03,580 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-08 03:07:03,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:03,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:03,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:03,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-08 03:07:03,799 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 03:07:03,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 03:07:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:07:03,800 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-08 03:07:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:04,020 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-08 03:07:04,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:07:04,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-08 03:07:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:04,025 INFO L225 Difference]: With dead ends: 29 [2019-09-08 03:07:04,025 INFO L226 Difference]: Without dead ends: 26 [2019-09-08 03:07:04,026 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:07:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-08 03:07:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-08 03:07:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-08 03:07:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-08 03:07:04,033 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-08 03:07:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:04,034 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-08 03:07:04,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 03:07:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-08 03:07:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 03:07:04,035 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:04,035 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:04,035 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-09-08 03:07:04,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:04,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:04,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:04,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:04,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:04,045 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:04,045 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:04,045 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:04,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:04,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:04,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:04,099 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-08 03:07:04,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:04,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:07:04,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:04,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-08 03:07:04,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:07:04,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:07:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:07:04,344 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-08 03:07:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:04,617 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-08 03:07:04,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 03:07:04,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-08 03:07:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:04,618 INFO L225 Difference]: With dead ends: 30 [2019-09-08 03:07:04,618 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 03:07:04,619 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:07:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 03:07:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 03:07:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 03:07:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-08 03:07:04,623 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-08 03:07:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:04,623 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-08 03:07:04,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:07:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-08 03:07:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 03:07:04,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:04,624 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:04,624 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-09-08 03:07:04,625 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:04,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:04,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:04,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:04,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:04,634 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:04,634 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:04,634 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:04,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:04,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-08 03:07:04,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:04,722 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-08 03:07:04,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:04,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:04,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:04,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-08 03:07:04,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 03:07:04,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 03:07:04,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:07:04,973 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-08 03:07:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:05,271 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-08 03:07:05,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 03:07:05,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-08 03:07:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:05,276 INFO L225 Difference]: With dead ends: 31 [2019-09-08 03:07:05,276 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 03:07:05,277 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:07:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 03:07:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 03:07:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 03:07:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-08 03:07:05,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-08 03:07:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:05,282 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-08 03:07:05,282 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 03:07:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-08 03:07:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 03:07:05,283 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:05,283 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:05,283 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-09-08 03:07:05,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:05,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:05,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:05,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:05,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:05,293 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:05,293 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:05,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:05,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:05,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:05,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:05,428 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-08 03:07:05,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:05,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:05,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:05,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-08 03:07:05,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 03:07:05,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 03:07:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:07:05,733 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-08 03:07:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:06,046 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-08 03:07:06,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 03:07:06,047 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-08 03:07:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:06,048 INFO L225 Difference]: With dead ends: 32 [2019-09-08 03:07:06,048 INFO L226 Difference]: Without dead ends: 29 [2019-09-08 03:07:06,049 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:07:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-08 03:07:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-08 03:07:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 03:07:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-08 03:07:06,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-08 03:07:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:06,055 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-08 03:07:06,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 03:07:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-08 03:07:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 03:07:06,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:06,056 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:06,057 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:06,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-09-08 03:07:06,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:06,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:06,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:06,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:06,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:06,066 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:06,066 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:06,066 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:06,090 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:06,120 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-08 03:07:06,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:06,122 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-08 03:07:06,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:06,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:06,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:06,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-08 03:07:06,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 03:07:06,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 03:07:06,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:07:06,412 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-09-08 03:07:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:06,759 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-08 03:07:06,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 03:07:06,759 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-09-08 03:07:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:06,760 INFO L225 Difference]: With dead ends: 33 [2019-09-08 03:07:06,760 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 03:07:06,761 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:07:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 03:07:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 03:07:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 03:07:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-08 03:07:06,766 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-08 03:07:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:06,766 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-08 03:07:06,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 03:07:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-08 03:07:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-08 03:07:06,767 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:06,767 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:06,767 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-09-08 03:07:06,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:06,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:06,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:06,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:06,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:06,778 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:06,778 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:06,778 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:06,801 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:06,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-08 03:07:06,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:06,839 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-08 03:07:06,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:07,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:07,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:07,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-08 03:07:07,169 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 03:07:07,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 03:07:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:07:07,170 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-08 03:07:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:07,661 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-08 03:07:07,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 03:07:07,664 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-08 03:07:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:07,664 INFO L225 Difference]: With dead ends: 34 [2019-09-08 03:07:07,664 INFO L226 Difference]: Without dead ends: 31 [2019-09-08 03:07:07,665 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:07:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-08 03:07:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-08 03:07:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-08 03:07:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-08 03:07:07,670 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-08 03:07:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:07,670 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-08 03:07:07,670 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 03:07:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-08 03:07:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-08 03:07:07,671 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:07,672 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:07,672 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-09-08 03:07:07,672 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:07,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:07,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:07,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:07,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:07,682 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:07,682 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:07,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:07,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:07,731 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-08 03:07:07,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:08,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:08,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:08,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-08 03:07:08,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 03:07:08,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 03:07:08,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:07:08,111 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-08 03:07:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:08,511 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-08 03:07:08,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 03:07:08,511 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-08 03:07:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:08,512 INFO L225 Difference]: With dead ends: 35 [2019-09-08 03:07:08,512 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 03:07:08,513 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:07:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 03:07:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-08 03:07:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 03:07:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-08 03:07:08,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-08 03:07:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:08,519 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-08 03:07:08,519 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 03:07:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-08 03:07:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 03:07:08,519 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:08,520 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:08,520 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:08,520 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-09-08 03:07:08,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:08,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:08,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:08,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:08,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:08,530 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:08,530 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:08,530 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:08,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:08,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:08,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:08,587 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-08 03:07:08,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:08,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:09,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:09,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-08 03:07:09,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 03:07:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 03:07:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:07:09,008 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-08 03:07:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:09,420 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-08 03:07:09,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 03:07:09,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-08 03:07:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:09,421 INFO L225 Difference]: With dead ends: 36 [2019-09-08 03:07:09,421 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 03:07:09,422 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:07:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 03:07:09,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-08 03:07:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 03:07:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-08 03:07:09,428 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-08 03:07:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:09,429 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-08 03:07:09,429 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 03:07:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-08 03:07:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-08 03:07:09,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:09,430 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:09,430 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-09-08 03:07:09,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:09,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:09,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:09,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:09,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:09,439 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:09,440 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:09,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:09,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:09,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-08 03:07:09,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:09,601 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-08 03:07:09,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:10,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:10,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:10,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-08 03:07:10,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 03:07:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 03:07:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:07:10,072 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-08 03:07:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:10,495 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-08 03:07:10,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-08 03:07:10,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-08 03:07:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:10,496 INFO L225 Difference]: With dead ends: 37 [2019-09-08 03:07:10,496 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 03:07:10,497 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:07:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 03:07:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-08 03:07:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-08 03:07:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-08 03:07:10,502 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-08 03:07:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:10,502 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-08 03:07:10,502 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 03:07:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-08 03:07:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-08 03:07:10,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:10,503 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:10,503 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-09-08 03:07:10,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:10,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:10,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:10,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:10,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:10,513 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:10,513 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:10,513 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:10,537 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:10,696 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:10,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:10,698 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-08 03:07:10,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:11,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:11,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:11,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-08 03:07:11,111 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 03:07:11,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 03:07:11,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:07:11,112 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-08 03:07:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:11,591 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-08 03:07:11,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 03:07:11,591 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-08 03:07:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:11,592 INFO L225 Difference]: With dead ends: 38 [2019-09-08 03:07:11,592 INFO L226 Difference]: Without dead ends: 35 [2019-09-08 03:07:11,593 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:07:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-08 03:07:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-08 03:07:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-08 03:07:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-08 03:07:11,598 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-08 03:07:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:11,599 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-08 03:07:11,599 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 03:07:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-08 03:07:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-08 03:07:11,600 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:11,600 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:11,600 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-09-08 03:07:11,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:11,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:11,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:11,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:11,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:11,609 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:11,609 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:11,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:11,641 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:11,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-08 03:07:11,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:11,685 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-08 03:07:11,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:12,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:07:12,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:12,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-08 03:07:12,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 03:07:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 03:07:12,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:07:12,118 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-08 03:07:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:12,700 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-08 03:07:12,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 03:07:12,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-08 03:07:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:12,701 INFO L225 Difference]: With dead ends: 39 [2019-09-08 03:07:12,702 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 03:07:12,703 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:07:12,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 03:07:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 03:07:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 03:07:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-08 03:07:12,709 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-08 03:07:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:12,709 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-08 03:07:12,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 03:07:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-08 03:07:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-08 03:07:12,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:12,712 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:12,712 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-09-08 03:07:12,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:12,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:12,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:12,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:12,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:12,727 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:12,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:12,728 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:12,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:12,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 03:07:12,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:12,815 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-08 03:07:12,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:13,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:13,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:13,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-08 03:07:13,310 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 03:07:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 03:07:13,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:07:13,311 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-08 03:07:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:13,849 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-08 03:07:13,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 03:07:13,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-08 03:07:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:13,851 INFO L225 Difference]: With dead ends: 40 [2019-09-08 03:07:13,851 INFO L226 Difference]: Without dead ends: 37 [2019-09-08 03:07:13,852 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:07:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-08 03:07:13,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-08 03:07:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 03:07:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-08 03:07:13,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-08 03:07:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:13,857 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-08 03:07:13,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 03:07:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-08 03:07:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-08 03:07:13,858 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:13,858 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:13,858 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-09-08 03:07:13,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:13,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:13,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:13,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:13,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:13,867 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:13,867 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:13,867 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:13,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:13,936 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-08 03:07:13,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:14,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:14,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:14,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-08 03:07:14,391 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 03:07:14,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 03:07:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:07:14,392 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-08 03:07:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:14,968 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-08 03:07:14,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-08 03:07:14,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-08 03:07:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:14,969 INFO L225 Difference]: With dead ends: 41 [2019-09-08 03:07:14,969 INFO L226 Difference]: Without dead ends: 38 [2019-09-08 03:07:14,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:07:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-08 03:07:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-08 03:07:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-08 03:07:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-08 03:07:14,976 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-08 03:07:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:14,976 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-08 03:07:14,976 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 03:07:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-08 03:07:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 03:07:14,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:14,977 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:14,977 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-09-08 03:07:14,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:14,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:14,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:14,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:14,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:14,985 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:14,986 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:14,986 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:15,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:15,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:15,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:15,057 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-08 03:07:15,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:15,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:15,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:15,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-08 03:07:15,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 03:07:15,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 03:07:15,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:07:15,556 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-08 03:07:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:16,176 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-08 03:07:16,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 03:07:16,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-08 03:07:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:16,178 INFO L225 Difference]: With dead ends: 42 [2019-09-08 03:07:16,178 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 03:07:16,179 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:07:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 03:07:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 03:07:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 03:07:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-08 03:07:16,183 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-08 03:07:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:16,183 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-08 03:07:16,183 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 03:07:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-08 03:07:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-08 03:07:16,184 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:16,184 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:16,184 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-09-08 03:07:16,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:16,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:16,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:16,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:16,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:16,192 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:16,192 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:16,193 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:16,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:16,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-08 03:07:16,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:16,510 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-08 03:07:16,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:17,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:17,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:17,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-08 03:07:17,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 03:07:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 03:07:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:07:17,037 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-08 03:07:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:17,767 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-08 03:07:17,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 03:07:17,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-08 03:07:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:17,767 INFO L225 Difference]: With dead ends: 43 [2019-09-08 03:07:17,767 INFO L226 Difference]: Without dead ends: 40 [2019-09-08 03:07:17,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:07:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-08 03:07:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-08 03:07:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-08 03:07:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-08 03:07:17,773 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-08 03:07:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:17,773 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-08 03:07:17,773 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 03:07:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-08 03:07:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 03:07:17,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:17,774 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:17,774 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-09-08 03:07:17,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:17,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:17,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:17,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:17,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:17,782 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:17,782 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:17,782 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:17,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:18,014 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:18,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:18,017 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-08 03:07:18,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:18,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:18,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:18,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-08 03:07:18,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-08 03:07:18,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-08 03:07:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:07:18,605 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-08 03:07:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:19,344 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-08 03:07:19,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 03:07:19,345 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-08 03:07:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:19,345 INFO L225 Difference]: With dead ends: 44 [2019-09-08 03:07:19,345 INFO L226 Difference]: Without dead ends: 41 [2019-09-08 03:07:19,346 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:07:19,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-08 03:07:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-08 03:07:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-08 03:07:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-08 03:07:19,352 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-08 03:07:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:19,353 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-08 03:07:19,353 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-08 03:07:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-08 03:07:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 03:07:19,353 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:19,353 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:19,354 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-09-08 03:07:19,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:19,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:19,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:19,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:19,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:19,365 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:19,365 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:19,365 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:19,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:07:19,470 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-08 03:07:19,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:19,473 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-08 03:07:19,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:20,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:20,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:20,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-08 03:07:20,077 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 03:07:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 03:07:20,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:07:20,078 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-08 03:07:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:20,923 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-08 03:07:20,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-08 03:07:20,923 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-08 03:07:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:20,924 INFO L225 Difference]: With dead ends: 45 [2019-09-08 03:07:20,924 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 03:07:20,926 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:07:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 03:07:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 03:07:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 03:07:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-08 03:07:20,930 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-08 03:07:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:20,930 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-08 03:07:20,931 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 03:07:20,931 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-08 03:07:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-08 03:07:20,931 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:20,931 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:20,931 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-09-08 03:07:20,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:20,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:20,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:20,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:20,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:20,940 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:20,940 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:20,940 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:20,955 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:21,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-08 03:07:21,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:21,091 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-08 03:07:21,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:21,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:21,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:21,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-08 03:07:21,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 03:07:21,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 03:07:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:07:21,729 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-08 03:07:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:22,600 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-08 03:07:22,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 03:07:22,605 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-08 03:07:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:22,605 INFO L225 Difference]: With dead ends: 46 [2019-09-08 03:07:22,605 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 03:07:22,606 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:07:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 03:07:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-08 03:07:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-08 03:07:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-08 03:07:22,618 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-08 03:07:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:22,619 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-08 03:07:22,619 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 03:07:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-08 03:07:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-08 03:07:22,619 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:22,619 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:22,620 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-09-08 03:07:22,620 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:22,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:22,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:22,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:22,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:22,630 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:22,630 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:22,630 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:22,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:22,700 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-08 03:07:22,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:23,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:23,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:23,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-08 03:07:23,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 03:07:23,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 03:07:23,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:07:23,368 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-08 03:07:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:24,211 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-08 03:07:24,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-08 03:07:24,212 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-08 03:07:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:24,212 INFO L225 Difference]: With dead ends: 47 [2019-09-08 03:07:24,213 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 03:07:24,214 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:07:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 03:07:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-08 03:07:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-08 03:07:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-08 03:07:24,218 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-08 03:07:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:24,218 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-08 03:07:24,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 03:07:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-08 03:07:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 03:07:24,219 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:24,219 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:24,219 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-09-08 03:07:24,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:24,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:24,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:24,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:24,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:24,227 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:24,227 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:24,227 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:24,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:24,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:24,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:24,309 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-08 03:07:24,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:25,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:25,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:25,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-08 03:07:25,307 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 03:07:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 03:07:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:07:25,308 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-08 03:07:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:26,204 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-08 03:07:26,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 03:07:26,204 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-08 03:07:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:26,205 INFO L225 Difference]: With dead ends: 48 [2019-09-08 03:07:26,205 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 03:07:26,207 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 03:07:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 03:07:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 03:07:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 03:07:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-08 03:07:26,211 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-08 03:07:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:26,211 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-08 03:07:26,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 03:07:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-08 03:07:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-08 03:07:26,212 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:26,212 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:26,212 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-09-08 03:07:26,213 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:26,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:26,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:26,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:26,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:26,220 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:26,221 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:26,221 INFO L223 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 [2019-09-08 03:07:26,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:26,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-08 03:07:26,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:26,895 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-08 03:07:26,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:27,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:27,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:27,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-08 03:07:27,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-08 03:07:27,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-08 03:07:27,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 03:07:27,660 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-08 03:07:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:28,666 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-08 03:07:28,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-08 03:07:28,666 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-08 03:07:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:28,666 INFO L225 Difference]: With dead ends: 49 [2019-09-08 03:07:28,666 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 03:07:28,667 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:07:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 03:07:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-08 03:07:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-08 03:07:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-08 03:07:28,672 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-08 03:07:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:28,672 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-08 03:07:28,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-08 03:07:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-08 03:07:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-08 03:07:28,673 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:28,673 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:28,673 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-09-08 03:07:28,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:28,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:28,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:28,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:28,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:28,681 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:28,682 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:28,682 INFO L223 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 [2019-09-08 03:07:28,699 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:28,969 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:28,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:28,971 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-08 03:07:28,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:29,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:29,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:29,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-08 03:07:29,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-08 03:07:29,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-08 03:07:29,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:07:29,747 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-08 03:07:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:30,824 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-08 03:07:30,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 03:07:30,825 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-08 03:07:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:30,825 INFO L225 Difference]: With dead ends: 50 [2019-09-08 03:07:30,826 INFO L226 Difference]: Without dead ends: 47 [2019-09-08 03:07:30,826 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:07:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-08 03:07:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-08 03:07:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-08 03:07:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-08 03:07:30,831 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-08 03:07:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:30,831 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-08 03:07:30,831 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-08 03:07:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-08 03:07:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-08 03:07:30,832 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:30,832 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:30,833 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-09-08 03:07:30,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:30,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:30,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:30,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:30,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:30,841 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:30,841 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:30,841 INFO L223 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 [2019-09-08 03:07:30,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:07:30,951 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-08 03:07:30,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:30,954 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-08 03:07:30,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:31,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:31,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:31,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-08 03:07:31,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-08 03:07:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-08 03:07:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:07:31,764 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-08 03:07:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:32,935 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-08 03:07:32,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-08 03:07:32,936 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-08 03:07:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:32,936 INFO L225 Difference]: With dead ends: 51 [2019-09-08 03:07:32,936 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 03:07:32,937 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 03:07:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 03:07:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-08 03:07:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 03:07:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-08 03:07:32,941 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-08 03:07:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:32,942 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-08 03:07:32,942 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-08 03:07:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-08 03:07:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-08 03:07:32,942 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:32,942 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:32,942 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-09-08 03:07:32,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:32,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:32,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:32,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:32,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:32,950 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:32,951 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:32,951 INFO L223 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 [2019-09-08 03:07:32,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:33,161 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 03:07:33,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:33,164 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-08 03:07:33,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:33,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:33,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:33,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-08 03:07:33,986 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-08 03:07:33,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-08 03:07:33,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 03:07:33,987 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-08 03:07:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:35,099 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-08 03:07:35,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-08 03:07:35,099 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-08 03:07:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:35,100 INFO L225 Difference]: With dead ends: 52 [2019-09-08 03:07:35,101 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 03:07:35,102 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 03:07:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 03:07:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-08 03:07:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-08 03:07:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-08 03:07:35,106 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-08 03:07:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:35,107 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-08 03:07:35,107 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-08 03:07:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-08 03:07:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-08 03:07:35,107 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:35,108 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:35,108 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-09-08 03:07:35,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:35,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:35,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:35,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:35,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:35,116 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:35,116 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:35,116 INFO L223 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) [2019-09-08 03:07:35,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:35,219 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-08 03:07:35,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:36,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:36,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:36,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-08 03:07:36,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-08 03:07:36,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-08 03:07:36,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 03:07:36,271 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-08 03:07:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:37,385 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-08 03:07:37,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-08 03:07:37,386 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-08 03:07:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:37,387 INFO L225 Difference]: With dead ends: 53 [2019-09-08 03:07:37,387 INFO L226 Difference]: Without dead ends: 50 [2019-09-08 03:07:37,389 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:07:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-08 03:07:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-08 03:07:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-08 03:07:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-08 03:07:37,393 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-08 03:07:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:37,394 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-08 03:07:37,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-08 03:07:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-08 03:07:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 03:07:37,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:37,395 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:37,395 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-09-08 03:07:37,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:37,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:37,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:37,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:37,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:37,403 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:37,404 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:37,404 INFO L223 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) [2019-09-08 03:07:37,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:37,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:37,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:37,481 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-08 03:07:37,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:38,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:38,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:38,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-08 03:07:38,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-08 03:07:38,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-08 03:07:38,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:07:38,404 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-08 03:07:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:39,673 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-08 03:07:39,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-08 03:07:39,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-08 03:07:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:39,674 INFO L225 Difference]: With dead ends: 54 [2019-09-08 03:07:39,674 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 03:07:39,676 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 03:07:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 03:07:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-08 03:07:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 03:07:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-08 03:07:39,681 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-08 03:07:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:39,681 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-08 03:07:39,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-08 03:07:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-08 03:07:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-08 03:07:39,682 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:39,682 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:39,682 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:39,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-09-08 03:07:39,683 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:39,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:39,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:39,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:39,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:39,691 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:39,691 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:39,691 INFO L223 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 [2019-09-08 03:07:39,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:41,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-08 03:07:41,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:41,023 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-08 03:07:41,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:41,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:41,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:41,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-08 03:07:41,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-08 03:07:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-08 03:07:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 03:07:41,966 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-08 03:07:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:43,277 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-08 03:07:43,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-08 03:07:43,277 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-08 03:07:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:43,278 INFO L225 Difference]: With dead ends: 55 [2019-09-08 03:07:43,278 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 03:07:43,279 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 03:07:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 03:07:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-08 03:07:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-08 03:07:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-08 03:07:43,285 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-08 03:07:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:43,285 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-08 03:07:43,285 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-08 03:07:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-08 03:07:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-08 03:07:43,286 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:43,286 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:43,286 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-09-08 03:07:43,287 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:43,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:43,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:43,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:43,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:43,294 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:43,294 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:43,295 INFO L223 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 [2019-09-08 03:07:43,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:43,649 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:43,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:43,652 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-08 03:07:43,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:44,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:44,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:44,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-08 03:07:44,635 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-08 03:07:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-08 03:07:44,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 03:07:44,636 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-08 03:07:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:45,984 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-08 03:07:45,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 03:07:45,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-08 03:07:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:45,985 INFO L225 Difference]: With dead ends: 56 [2019-09-08 03:07:45,986 INFO L226 Difference]: Without dead ends: 53 [2019-09-08 03:07:45,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:07:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-08 03:07:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-08 03:07:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-08 03:07:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-08 03:07:45,992 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-08 03:07:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:45,992 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-08 03:07:45,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-08 03:07:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-08 03:07:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-08 03:07:45,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:45,993 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:45,993 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-09-08 03:07:45,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:45,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:45,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:45,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:45,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:46,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:46,001 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:46,001 INFO L223 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) [2019-09-08 03:07:46,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:46,167 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-08 03:07:46,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:46,174 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-08 03:07:46,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:47,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:47,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:47,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-08 03:07:47,796 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 03:07:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 03:07:47,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:07:47,799 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-08 03:07:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:49,186 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-08 03:07:49,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-08 03:07:49,187 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-08 03:07:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:49,188 INFO L225 Difference]: With dead ends: 57 [2019-09-08 03:07:49,188 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 03:07:49,189 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 03:07:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 03:07:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-08 03:07:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 03:07:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-08 03:07:49,194 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-08 03:07:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:49,194 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-08 03:07:49,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 03:07:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-08 03:07:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-08 03:07:49,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:49,195 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:49,195 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-09-08 03:07:49,195 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:49,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:49,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:49,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:49,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:49,201 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:49,201 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:49,201 INFO L223 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 [2019-09-08 03:07:49,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:49,677 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-08 03:07:49,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:49,681 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-08 03:07:49,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:50,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:50,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:50,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-08 03:07:50,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-08 03:07:50,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-08 03:07:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 03:07:50,765 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-08 03:07:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:52,275 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-08 03:07:52,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-08 03:07:52,276 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-08 03:07:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:52,276 INFO L225 Difference]: With dead ends: 58 [2019-09-08 03:07:52,276 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 03:07:52,277 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 03:07:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 03:07:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-08 03:07:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-08 03:07:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-08 03:07:52,282 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-08 03:07:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:52,283 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-08 03:07:52,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-08 03:07:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-08 03:07:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 03:07:52,283 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:52,283 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:52,284 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-09-08 03:07:52,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:52,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:52,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:52,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:52,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:52,292 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:52,292 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:52,292 INFO L223 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) [2019-09-08 03:07:52,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:52,411 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-08 03:07:52,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:53,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:53,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:53,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-08 03:07:53,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-08 03:07:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-08 03:07:53,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 03:07:53,576 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-08 03:07:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:55,198 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-08 03:07:55,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-08 03:07:55,199 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-08 03:07:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:55,199 INFO L225 Difference]: With dead ends: 59 [2019-09-08 03:07:55,199 INFO L226 Difference]: Without dead ends: 56 [2019-09-08 03:07:55,200 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 03:07:55,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-08 03:07:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-08 03:07:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-08 03:07:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-08 03:07:55,205 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-08 03:07:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:55,205 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-08 03:07:55,205 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-08 03:07:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-08 03:07:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 03:07:55,205 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:55,206 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:55,206 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:55,206 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-09-08 03:07:55,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:55,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:55,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:55,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:55,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:55,213 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:55,213 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:55,213 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:07:55,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:55,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:55,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:55,298 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-08 03:07:55,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:56,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:56,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:56,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-08 03:07:56,637 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-08 03:07:56,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-08 03:07:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 03:07:56,637 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-08 03:07:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:58,308 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-08 03:07:58,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-08 03:07:58,308 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-08 03:07:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:58,309 INFO L225 Difference]: With dead ends: 60 [2019-09-08 03:07:58,309 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 03:07:58,309 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 03:07:58,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 03:07:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-08 03:07:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 03:07:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-08 03:07:58,314 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-08 03:07:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:58,314 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-08 03:07:58,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-08 03:07:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-08 03:07:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-08 03:07:58,315 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:58,315 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:58,315 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-09-08 03:07:58,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:58,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:58,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:58,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:58,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:58,323 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:58,323 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:58,323 INFO L223 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 [2019-09-08 03:07:58,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:08:00,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-08 03:08:00,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:00,741 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-08 03:08:00,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:01,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:01,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:01,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-08 03:08:01,961 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-08 03:08:01,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-08 03:08:01,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 03:08:01,961 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-08 03:08:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:03,684 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-08 03:08:03,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-08 03:08:03,685 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-08 03:08:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:03,685 INFO L225 Difference]: With dead ends: 61 [2019-09-08 03:08:03,685 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 03:08:03,686 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:08:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 03:08:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-08 03:08:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-08 03:08:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-08 03:08:03,691 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-08 03:08:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:03,692 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-08 03:08:03,692 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-08 03:08:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-08 03:08:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-08 03:08:03,692 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:03,692 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:03,692 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-09-08 03:08:03,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:03,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:03,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:03,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:03,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:03,699 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:03,699 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:03,700 INFO L223 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 [2019-09-08 03:08:03,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:08:04,136 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:08:04,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:04,139 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-08 03:08:04,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:05,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:05,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:05,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-08 03:08:05,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-08 03:08:05,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-08 03:08:05,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:08:05,380 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-08 03:08:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:07,122 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-08 03:08:07,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-08 03:08:07,122 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-08 03:08:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:07,123 INFO L225 Difference]: With dead ends: 62 [2019-09-08 03:08:07,123 INFO L226 Difference]: Without dead ends: 59 [2019-09-08 03:08:07,123 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 03:08:07,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-08 03:08:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-08 03:08:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-08 03:08:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-08 03:08:07,128 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-08 03:08:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:07,129 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-08 03:08:07,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-08 03:08:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-08 03:08:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-08 03:08:07,129 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:07,129 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:07,130 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:07,130 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-09-08 03:08:07,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:07,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:07,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:07,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:07,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:07,138 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:07,138 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:07,138 INFO L223 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 [2019-09-08 03:08:07,159 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:08:07,270 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-08 03:08:07,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:07,273 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-08 03:08:07,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:08,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:08,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:08,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-08 03:08:08,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-08 03:08:08,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-08 03:08:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 03:08:08,618 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-08 03:08:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:10,493 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-08 03:08:10,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-08 03:08:10,493 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-08 03:08:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:10,494 INFO L225 Difference]: With dead ends: 63 [2019-09-08 03:08:10,495 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 03:08:10,496 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 03:08:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 03:08:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-08 03:08:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 03:08:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-08 03:08:10,502 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-08 03:08:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:10,502 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-08 03:08:10,502 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-08 03:08:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-08 03:08:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-08 03:08:10,502 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:10,503 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:10,503 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-09-08 03:08:10,503 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:10,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:10,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:10,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:10,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:10,511 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:10,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:10,511 INFO L223 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 [2019-09-08 03:08:10,528 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:08:11,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 03:08:11,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:11,164 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-08 03:08:11,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:12,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:12,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:12,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-08 03:08:12,499 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-08 03:08:12,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-08 03:08:12,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 03:08:12,500 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-08 03:08:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:14,376 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-08 03:08:14,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-08 03:08:14,377 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-08 03:08:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:14,378 INFO L225 Difference]: With dead ends: 64 [2019-09-08 03:08:14,378 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 03:08:14,379 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 03:08:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 03:08:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-08 03:08:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-08 03:08:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-08 03:08:14,385 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-08 03:08:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:14,385 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-08 03:08:14,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-08 03:08:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-08 03:08:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-08 03:08:14,386 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:14,386 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:14,386 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:14,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-09-08 03:08:14,387 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:14,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:14,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:14,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:14,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:14,394 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:14,395 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:14,395 INFO L223 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 [2019-09-08 03:08:14,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:08:14,507 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-08 03:08:14,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:15,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:15,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:15,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-08 03:08:15,948 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-08 03:08:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-08 03:08:15,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 03:08:15,949 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-08 03:08:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:17,999 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-08 03:08:17,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-08 03:08:17,999 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-08 03:08:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:18,000 INFO L225 Difference]: With dead ends: 65 [2019-09-08 03:08:18,000 INFO L226 Difference]: Without dead ends: 62 [2019-09-08 03:08:18,000 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 03:08:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-08 03:08:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-08 03:08:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-08 03:08:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-08 03:08:18,006 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-08 03:08:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:18,006 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-08 03:08:18,006 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-08 03:08:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-08 03:08:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 03:08:18,007 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:18,007 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:18,007 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:18,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-09-08 03:08:18,008 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:18,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:18,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:18,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:18,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:18,017 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:18,017 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:18,017 INFO L223 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 [2019-09-08 03:08:18,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:08:18,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:08:18,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:18,142 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-08 03:08:18,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:19,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:19,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:19,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-08 03:08:19,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-08 03:08:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-08 03:08:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 03:08:19,571 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-08 03:08:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:21,622 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-08 03:08:21,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-08 03:08:21,622 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-08 03:08:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:21,623 INFO L225 Difference]: With dead ends: 66 [2019-09-08 03:08:21,624 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 03:08:21,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 03:08:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 03:08:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-08 03:08:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 03:08:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-08 03:08:21,631 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-08 03:08:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:21,631 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-08 03:08:21,631 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-08 03:08:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-08 03:08:21,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-08 03:08:21,632 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:21,632 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:21,632 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-09-08 03:08:21,633 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:21,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:21,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:21,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:21,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:21,640 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:21,640 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:21,640 INFO L223 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 [2019-09-08 03:08:21,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:08:25,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-08 03:08:25,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:25,856 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-08 03:08:25,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:27,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:27,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:27,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-08 03:08:27,368 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 03:08:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 03:08:27,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 03:08:27,369 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-08 03:08:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:29,492 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-08 03:08:29,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-08 03:08:29,493 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-08 03:08:29,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:29,494 INFO L225 Difference]: With dead ends: 67 [2019-09-08 03:08:29,494 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 03:08:29,495 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 03:08:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 03:08:29,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-08 03:08:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-08 03:08:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-08 03:08:29,502 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-08 03:08:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:29,502 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-08 03:08:29,502 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 03:08:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-08 03:08:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-08 03:08:29,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:29,503 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:29,503 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:29,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-09-08 03:08:29,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:29,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:29,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:29,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:29,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:29,512 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:29,512 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:29,512 INFO L223 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 [2019-09-08 03:08:29,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:08:30,041 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:08:30,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:30,045 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-08 03:08:30,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:31,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:31,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:31,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-08 03:08:31,587 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-08 03:08:31,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-08 03:08:31,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 03:08:31,588 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-08 03:08:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:33,828 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-08 03:08:33,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-08 03:08:33,829 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-08 03:08:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:33,829 INFO L225 Difference]: With dead ends: 68 [2019-09-08 03:08:33,829 INFO L226 Difference]: Without dead ends: 65 [2019-09-08 03:08:33,830 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 03:08:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-08 03:08:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-08 03:08:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-08 03:08:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-08 03:08:33,835 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-08 03:08:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:33,836 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-08 03:08:33,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-08 03:08:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-08 03:08:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-08 03:08:33,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:33,836 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:33,837 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-09-08 03:08:33,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:33,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:33,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:33,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:33,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:33,845 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:33,845 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:33,846 INFO L223 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 [2019-09-08 03:08:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:08:34,021 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-08 03:08:34,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:34,025 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-08 03:08:34,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:35,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:35,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:35,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-08 03:08:35,598 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-08 03:08:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-08 03:08:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 03:08:35,599 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-08 03:08:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:37,897 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-08 03:08:37,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-08 03:08:37,899 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-08 03:08:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:37,900 INFO L225 Difference]: With dead ends: 69 [2019-09-08 03:08:37,900 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 03:08:37,900 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 03:08:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 03:08:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-08 03:08:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 03:08:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-08 03:08:37,905 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-08 03:08:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:37,905 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-08 03:08:37,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-08 03:08:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-08 03:08:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-08 03:08:37,906 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:37,906 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:37,906 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:37,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-09-08 03:08:37,906 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:37,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:37,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:37,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:37,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:37,915 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:37,915 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:37,916 INFO L223 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) [2019-09-08 03:08:37,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:39,149 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-08 03:08:39,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:39,156 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-08 03:08:39,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:40,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:40,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:40,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-08 03:08:40,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-08 03:08:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-08 03:08:40,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 03:08:40,795 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-08 03:08:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:43,209 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-08 03:08:43,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-08 03:08:43,210 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-08 03:08:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:43,210 INFO L225 Difference]: With dead ends: 70 [2019-09-08 03:08:43,210 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 03:08:43,210 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 03:08:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 03:08:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-08 03:08:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-08 03:08:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-08 03:08:43,215 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-08 03:08:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:43,216 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-08 03:08:43,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-08 03:08:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-08 03:08:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-08 03:08:43,216 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:43,217 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:43,217 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-09-08 03:08:43,217 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:43,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:43,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:43,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:43,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:43,226 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:43,226 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:43,226 INFO L223 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 [2019-09-08 03:08:43,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:08:43,362 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-08 03:08:43,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:45,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:45,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:45,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-08 03:08:45,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-08 03:08:45,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-08 03:08:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 03:08:45,472 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-08 03:08:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:47,986 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-08 03:08:47,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-08 03:08:47,986 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-08 03:08:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:47,987 INFO L225 Difference]: With dead ends: 71 [2019-09-08 03:08:47,987 INFO L226 Difference]: Without dead ends: 68 [2019-09-08 03:08:47,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 03:08:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-08 03:08:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-08 03:08:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 03:08:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-08 03:08:47,994 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-08 03:08:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:47,994 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-08 03:08:47,994 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-08 03:08:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-08 03:08:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 03:08:47,994 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:47,994 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:47,995 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-09-08 03:08:47,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:47,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:47,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:47,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:47,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:48,003 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:48,003 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:48,003 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:08:48,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:48,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:08:48,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:48,139 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-08 03:08:48,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:49,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:49,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:49,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-08 03:08:49,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-08 03:08:49,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-08 03:08:49,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 03:08:49,930 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-08 03:08:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:52,465 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-08 03:08:52,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-08 03:08:52,466 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-08 03:08:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:52,467 INFO L225 Difference]: With dead ends: 72 [2019-09-08 03:08:52,467 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 03:08:52,467 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 03:08:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 03:08:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-08 03:08:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 03:08:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-08 03:08:52,473 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-08 03:08:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:52,473 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-08 03:08:52,473 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-08 03:08:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-08 03:08:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 03:08:52,474 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:52,474 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:52,474 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:52,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-09-08 03:08:52,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:52,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:52,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:52,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:52,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:52,483 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:52,483 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:52,483 INFO L223 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 [2019-09-08 03:08:52,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:08:59,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-08 03:08:59,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:59,596 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-08 03:08:59,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:01,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:01,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:01,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-08 03:09:01,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-08 03:09:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-08 03:09:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 03:09:01,430 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-08 03:09:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:04,060 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-08 03:09:04,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-08 03:09:04,061 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-08 03:09:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:04,062 INFO L225 Difference]: With dead ends: 73 [2019-09-08 03:09:04,062 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 03:09:04,063 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 03:09:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 03:09:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-08 03:09:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-08 03:09:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-08 03:09:04,069 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-08 03:09:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:04,070 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-08 03:09:04,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-08 03:09:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-08 03:09:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-08 03:09:04,070 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:04,070 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:04,071 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-09-08 03:09:04,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:04,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:04,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:04,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:04,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:04,079 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:04,079 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:04,080 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:09:04,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:04,712 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:09:04,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:04,717 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-08 03:09:04,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:06,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:06,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:06,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-08 03:09:06,623 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-08 03:09:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-08 03:09:06,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 03:09:06,624 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-08 03:09:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:09,360 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-08 03:09:09,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-08 03:09:09,360 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-08 03:09:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:09,360 INFO L225 Difference]: With dead ends: 74 [2019-09-08 03:09:09,361 INFO L226 Difference]: Without dead ends: 71 [2019-09-08 03:09:09,361 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 03:09:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-08 03:09:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-08 03:09:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-08 03:09:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-08 03:09:09,369 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-08 03:09:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:09,369 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-08 03:09:09,369 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-08 03:09:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-08 03:09:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-08 03:09:09,370 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:09,370 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:09,370 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-09-08 03:09:09,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:09,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:09,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:09,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:09,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:09,379 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:09,380 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:09,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:09,406 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:09:09,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-08 03:09:09,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:09,581 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-08 03:09:09,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:11,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:11,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:11,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-08 03:09:11,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-08 03:09:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-08 03:09:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 03:09:11,492 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-08 03:09:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:14,238 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-08 03:09:14,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-08 03:09:14,238 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-08 03:09:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:14,239 INFO L225 Difference]: With dead ends: 75 [2019-09-08 03:09:14,239 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 03:09:14,240 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-08 03:09:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 03:09:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-08 03:09:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 03:09:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-08 03:09:14,247 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-08 03:09:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:14,247 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-08 03:09:14,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-08 03:09:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-08 03:09:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-08 03:09:14,248 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:14,248 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:14,248 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-09-08 03:09:14,249 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:14,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:14,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:14,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:14,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:14,257 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:14,257 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:14,257 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:09:14,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:16,039 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-08 03:09:16,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:16,046 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-08 03:09:16,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:17,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:18,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:18,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-08 03:09:18,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-08 03:09:18,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-08 03:09:18,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-08 03:09:18,040 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-08 03:09:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:20,837 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-08 03:09:20,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-08 03:09:20,837 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-08 03:09:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:20,838 INFO L225 Difference]: With dead ends: 76 [2019-09-08 03:09:20,838 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 03:09:20,838 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 03:09:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 03:09:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-08 03:09:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-08 03:09:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-08 03:09:20,844 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-08 03:09:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:20,844 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-08 03:09:20,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-08 03:09:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-08 03:09:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-08 03:09:20,845 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:20,845 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:20,845 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:20,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-09-08 03:09:20,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:20,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:20,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:20,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:20,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:20,854 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:20,854 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:20,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:20,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:09:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:09:21,039 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-08 03:09:21,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:23,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Exception during sending of exit command (exit): Stream closed [2019-09-08 03:09:23,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:23,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-08 03:09:23,124 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-08 03:09:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-08 03:09:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 03:09:23,125 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-08 03:09:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:26,134 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-08 03:09:26,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-08 03:09:26,135 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-08 03:09:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:26,136 INFO L225 Difference]: With dead ends: 77 [2019-09-08 03:09:26,136 INFO L226 Difference]: Without dead ends: 74 [2019-09-08 03:09:26,136 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 03:09:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-08 03:09:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-08 03:09:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-08 03:09:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-08 03:09:26,144 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-08 03:09:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:26,145 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-08 03:09:26,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-08 03:09:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-08 03:09:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-08 03:09:26,146 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:26,146 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:26,146 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-09-08 03:09:26,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:26,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:26,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:26,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:09:26,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:26,154 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:26,154 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:26,155 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:26,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:09:26,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:09:26,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:26,337 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-08 03:09:26,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:28,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:28,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:28,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-08 03:09:28,419 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-08 03:09:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-08 03:09:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 03:09:28,420 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-08 03:09:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:31,842 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-08 03:09:31,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-08 03:09:31,843 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-08 03:09:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:31,844 INFO L225 Difference]: With dead ends: 78 [2019-09-08 03:09:31,844 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 03:09:31,845 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 03:09:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 03:09:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-08 03:09:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 03:09:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-08 03:09:31,851 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-08 03:09:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:31,851 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-08 03:09:31,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-08 03:09:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-08 03:09:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-08 03:09:31,851 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:31,852 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:31,852 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-09-08 03:09:31,852 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:31,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:31,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:31,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:31,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:31,859 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:31,859 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:31,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:31,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:09:43,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-08 03:09:43,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:43,550 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-08 03:09:43,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:45,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:45,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:45,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-08 03:09:45,767 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-08 03:09:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-08 03:09:45,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 03:09:45,768 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-08 03:09:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:48,986 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-08 03:09:48,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-08 03:09:48,986 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-08 03:09:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:48,987 INFO L225 Difference]: With dead ends: 79 [2019-09-08 03:09:48,987 INFO L226 Difference]: Without dead ends: 76 [2019-09-08 03:09:48,988 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 03:09:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-08 03:09:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-08 03:09:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-08 03:09:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-08 03:09:48,996 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-08 03:09:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:48,996 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-08 03:09:48,996 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-08 03:09:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-08 03:09:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-08 03:09:48,997 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:48,997 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:48,997 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-09-08 03:09:48,998 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:48,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:48,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:48,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:48,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:49,016 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:49,017 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:49,017 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:49,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:09:49,784 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:09:49,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:49,789 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-08 03:09:49,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:51,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:52,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:52,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-08 03:09:52,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-08 03:09:52,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-08 03:09:52,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 03:09:52,018 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-08 03:09:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:55,266 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-08 03:09:55,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-08 03:09:55,267 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-08 03:09:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:55,268 INFO L225 Difference]: With dead ends: 80 [2019-09-08 03:09:55,268 INFO L226 Difference]: Without dead ends: 77 [2019-09-08 03:09:55,269 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 03:09:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-08 03:09:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-08 03:09:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 03:09:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-08 03:09:55,277 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-08 03:09:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:55,277 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-08 03:09:55,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-08 03:09:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-08 03:09:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-08 03:09:55,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:55,278 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:55,278 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:55,279 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-09-08 03:09:55,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:55,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:55,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:55,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:55,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:55,288 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:55,289 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:55,289 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:55,315 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:09:55,700 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-08 03:09:55,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:55,705 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-08 03:09:55,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:58,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:58,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:58,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-08 03:09:58,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-08 03:09:58,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-08 03:09:58,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 03:09:58,097 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-08 03:10:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:01,535 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-08 03:10:01,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-08 03:10:01,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-08 03:10:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:01,536 INFO L225 Difference]: With dead ends: 81 [2019-09-08 03:10:01,536 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 03:10:01,536 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-08 03:10:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 03:10:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 03:10:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 03:10:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-08 03:10:01,544 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-08 03:10:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:01,544 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-08 03:10:01,544 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-08 03:10:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-08 03:10:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-08 03:10:01,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:01,545 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:01,545 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-09-08 03:10:01,545 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:01,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:01,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:01,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:01,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:01,554 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:01,554 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:01,554 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:10:01,580 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:04,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-08 03:10:04,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:04,620 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-08 03:10:04,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:07,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:07,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:07,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-08 03:10:07,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-08 03:10:07,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-08 03:10:07,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-08 03:10:07,226 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-08 03:10:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:10,789 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-08 03:10:10,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-08 03:10:10,789 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-08 03:10:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:10,790 INFO L225 Difference]: With dead ends: 82 [2019-09-08 03:10:10,790 INFO L226 Difference]: Without dead ends: 79 [2019-09-08 03:10:10,791 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 03:10:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-08 03:10:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-08 03:10:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-08 03:10:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-08 03:10:10,800 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-08 03:10:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:10,800 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-08 03:10:10,800 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-08 03:10:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-08 03:10:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-08 03:10:10,801 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:10,801 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:10,801 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-09-08 03:10:10,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:10,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:10,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:10,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:10,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:10,811 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:10,811 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:10,811 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:10:10,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:10:11,120 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-08 03:10:11,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:13,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:13,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:13,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-08 03:10:13,641 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-08 03:10:13,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-08 03:10:13,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 03:10:13,641 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-08 03:10:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:17,228 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-08 03:10:17,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-08 03:10:17,230 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-08 03:10:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:17,231 INFO L225 Difference]: With dead ends: 83 [2019-09-08 03:10:17,231 INFO L226 Difference]: Without dead ends: 80 [2019-09-08 03:10:17,231 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-09-08 03:10:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-08 03:10:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-08 03:10:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-08 03:10:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-08 03:10:17,240 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-08 03:10:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:17,240 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-08 03:10:17,240 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-08 03:10:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-08 03:10:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 03:10:17,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:17,241 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:17,241 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-09-08 03:10:17,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:17,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:17,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:17,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:10:17,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:17,250 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:17,250 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:17,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:17,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:10:17,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:10:17,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:17,468 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-08 03:10:17,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:19,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:19,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:19,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-08 03:10:19,957 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-08 03:10:19,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-08 03:10:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-08 03:10:19,957 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-08 03:10:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:23,634 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-08 03:10:23,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-08 03:10:23,635 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-08 03:10:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:23,636 INFO L225 Difference]: With dead ends: 84 [2019-09-08 03:10:23,636 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 03:10:23,637 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 03:10:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 03:10:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-08 03:10:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 03:10:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-08 03:10:23,644 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-08 03:10:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:23,644 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-08 03:10:23,644 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-08 03:10:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-08 03:10:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-08 03:10:23,645 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:23,645 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:23,645 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-09-08 03:10:23,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:23,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:23,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:23,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:23,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:23,655 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:23,655 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:23,656 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:23,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:10:41,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-08 03:10:41,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:41,704 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-08 03:10:41,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:44,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:44,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:44,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-08 03:10:44,321 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-08 03:10:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-08 03:10:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 03:10:44,322 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-08 03:10:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:48,178 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-08 03:10:48,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-08 03:10:48,178 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-08 03:10:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:48,179 INFO L225 Difference]: With dead ends: 85 [2019-09-08 03:10:48,179 INFO L226 Difference]: Without dead ends: 82 [2019-09-08 03:10:48,179 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 03:10:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-08 03:10:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-08 03:10:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-08 03:10:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-08 03:10:48,188 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-08 03:10:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:48,188 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-08 03:10:48,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-08 03:10:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-08 03:10:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-08 03:10:48,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:48,189 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:48,189 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-09-08 03:10:48,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:48,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:48,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:48,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:48,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:48,198 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:48,198 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:48,198 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:48,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:10:49,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:10:49,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:49,096 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-08 03:10:49,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:51,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:51,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:51,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-08 03:10:51,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-08 03:10:51,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-08 03:10:51,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 03:10:51,730 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-08 03:10:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:55,592 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-08 03:10:55,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-08 03:10:55,593 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-08 03:10:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:55,594 INFO L225 Difference]: With dead ends: 86 [2019-09-08 03:10:55,594 INFO L226 Difference]: Without dead ends: 83 [2019-09-08 03:10:55,594 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 03:10:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-08 03:10:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-08 03:10:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-08 03:10:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-08 03:10:55,601 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-08 03:10:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:55,601 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-08 03:10:55,601 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-08 03:10:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-08 03:10:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-08 03:10:55,602 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:55,602 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:55,602 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:55,603 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-09-08 03:10:55,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:55,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:55,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:55,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:55,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:55,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:55,610 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:55,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:55,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:10:55,923 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-08 03:10:55,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:55,929 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-08 03:10:55,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:58,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:58,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:58,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-08 03:10:58,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-08 03:10:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-08 03:10:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 03:10:58,666 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-08 03:11:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:02,671 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-08 03:11:02,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-08 03:11:02,671 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-08 03:11:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:02,672 INFO L225 Difference]: With dead ends: 87 [2019-09-08 03:11:02,672 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 03:11:02,673 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 03:11:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 03:11:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-08 03:11:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 03:11:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-08 03:11:02,681 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-08 03:11:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:02,681 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-08 03:11:02,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-08 03:11:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-08 03:11:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-08 03:11:02,682 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:02,682 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:02,682 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-09-08 03:11:02,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:02,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:02,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:02,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:02,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:02,690 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:02,691 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:02,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:02,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:11:06,720 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-08 03:11:06,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:06,725 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-08 03:11:06,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:09,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:09,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:09,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-08 03:11:09,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-08 03:11:09,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-08 03:11:09,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 03:11:09,766 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-08 03:11:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:13,898 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-08 03:11:13,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-08 03:11:13,899 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-08 03:11:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:13,899 INFO L225 Difference]: With dead ends: 88 [2019-09-08 03:11:13,899 INFO L226 Difference]: Without dead ends: 85 [2019-09-08 03:11:13,900 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 03:11:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-08 03:11:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-08 03:11:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-08 03:11:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-08 03:11:13,906 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-08 03:11:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:13,906 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-08 03:11:13,906 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-08 03:11:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-08 03:11:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-08 03:11:13,906 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:13,907 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:13,907 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:13,907 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-09-08 03:11:13,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:13,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:13,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:13,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:13,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:13,914 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:13,914 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:13,915 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:13,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:11:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:11:14,191 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-08 03:11:14,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:17,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:17,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:17,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-08 03:11:17,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-08 03:11:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-08 03:11:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 03:11:17,117 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-08 03:11:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:21,418 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-08 03:11:21,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-08 03:11:21,418 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-08 03:11:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:21,419 INFO L225 Difference]: With dead ends: 89 [2019-09-08 03:11:21,420 INFO L226 Difference]: Without dead ends: 86 [2019-09-08 03:11:21,420 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 03:11:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-08 03:11:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-08 03:11:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-08 03:11:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-08 03:11:21,429 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-08 03:11:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:21,429 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-08 03:11:21,429 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-08 03:11:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-08 03:11:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 03:11:21,430 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:21,430 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:21,430 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:21,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-09-08 03:11:21,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:21,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:21,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:21,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:11:21,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:21,439 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:21,439 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:21,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:21,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:11:21,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:11:21,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:21,709 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-08 03:11:21,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:24,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:24,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:24,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-08 03:11:24,708 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-08 03:11:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-08 03:11:24,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 03:11:24,709 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-08 03:11:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:29,045 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-08 03:11:29,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-08 03:11:29,045 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-08 03:11:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:29,046 INFO L225 Difference]: With dead ends: 90 [2019-09-08 03:11:29,046 INFO L226 Difference]: Without dead ends: 87 [2019-09-08 03:11:29,046 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 03:11:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-08 03:11:29,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-08 03:11:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 03:11:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-08 03:11:29,055 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-08 03:11:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:29,055 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-08 03:11:29,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-08 03:11:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-08 03:11:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-08 03:11:29,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:29,056 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:29,056 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-09-08 03:11:29,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:29,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:29,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:29,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:29,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:29,065 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:29,066 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:29,066 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:29,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:11:54,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-08 03:11:54,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:54,385 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-08 03:11:54,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:57,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:57,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:57,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-08 03:11:57,380 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-08 03:11:57,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-08 03:11:57,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 03:11:57,380 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-08 03:12:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:01,814 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-08 03:12:01,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-08 03:12:01,815 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-08 03:12:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:01,816 INFO L225 Difference]: With dead ends: 91 [2019-09-08 03:12:01,816 INFO L226 Difference]: Without dead ends: 88 [2019-09-08 03:12:01,816 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-08 03:12:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-08 03:12:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-08 03:12:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-08 03:12:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-08 03:12:01,824 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-08 03:12:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:01,824 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-08 03:12:01,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-08 03:12:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-08 03:12:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-08 03:12:01,824 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:01,824 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:01,825 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-09-08 03:12:01,825 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:01,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:01,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:01,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:01,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:01,831 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:01,831 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:01,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:12:01,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:02,892 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:12:02,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:02,897 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-08 03:12:02,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:05,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:05,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:05,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-08 03:12:05,998 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-08 03:12:05,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-08 03:12:05,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-08 03:12:05,999 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-08 03:12:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:10,546 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-08 03:12:10,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-08 03:12:10,546 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-08 03:12:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:10,547 INFO L225 Difference]: With dead ends: 92 [2019-09-08 03:12:10,547 INFO L226 Difference]: Without dead ends: 89 [2019-09-08 03:12:10,548 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 03:12:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-08 03:12:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-08 03:12:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-08 03:12:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-08 03:12:10,556 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-08 03:12:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:10,557 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-08 03:12:10,557 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-08 03:12:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-08 03:12:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-08 03:12:10,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:10,558 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:10,558 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-09-08 03:12:10,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:10,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:10,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:10,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:10,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:10,564 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:10,565 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:10,565 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:10,575 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:12:10,940 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-08 03:12:10,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:10,945 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-08 03:12:10,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:13,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:14,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:14,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-08 03:12:14,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-08 03:12:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-08 03:12:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 03:12:14,072 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-08 03:12:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:18,725 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-08 03:12:18,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-08 03:12:18,726 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-08 03:12:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:18,727 INFO L225 Difference]: With dead ends: 93 [2019-09-08 03:12:18,727 INFO L226 Difference]: Without dead ends: 90 [2019-09-08 03:12:18,727 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 03:12:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-08 03:12:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-08 03:12:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-08 03:12:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-08 03:12:18,735 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-08 03:12:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:18,736 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-08 03:12:18,736 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-08 03:12:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-08 03:12:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-08 03:12:18,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:18,736 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:18,737 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-09-08 03:12:18,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:18,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:18,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:18,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:18,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:18,744 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:18,744 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:18,744 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:18,778 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:12:25,317 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-08 03:12:25,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:25,327 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-08 03:12:25,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:28,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:28,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:28,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-08 03:12:28,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-08 03:12:28,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-08 03:12:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 03:12:28,551 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-08 03:12:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:33,384 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-08 03:12:33,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-08 03:12:33,384 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-08 03:12:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:33,385 INFO L225 Difference]: With dead ends: 94 [2019-09-08 03:12:33,385 INFO L226 Difference]: Without dead ends: 91 [2019-09-08 03:12:33,385 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 03:12:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-08 03:12:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-08 03:12:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-08 03:12:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-08 03:12:33,393 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-08 03:12:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:33,394 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-08 03:12:33,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-08 03:12:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-08 03:12:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-08 03:12:33,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:33,395 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:33,395 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-09-08 03:12:33,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:33,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:33,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:33,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:33,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:33,404 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:33,404 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:33,404 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:33,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:33,803 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-08 03:12:33,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:37,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:37,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:37,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-08 03:12:37,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-08 03:12:37,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-08 03:12:37,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 03:12:37,225 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-08 03:12:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:41,939 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-08 03:12:41,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-08 03:12:41,939 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-08 03:12:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:41,940 INFO L225 Difference]: With dead ends: 95 [2019-09-08 03:12:41,940 INFO L226 Difference]: Without dead ends: 92 [2019-09-08 03:12:41,941 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 03:12:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-08 03:12:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-08 03:12:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-08 03:12:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-08 03:12:41,948 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-08 03:12:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:41,948 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-08 03:12:41,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-08 03:12:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-08 03:12:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 03:12:41,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:41,949 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:41,949 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-09-08 03:12:41,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:41,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:41,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:41,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:41,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:41,956 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:41,956 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:41,957 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:41,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:12:42,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:12:42,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:42,273 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-08 03:12:42,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:45,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:45,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:45,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-08 03:12:45,618 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-08 03:12:45,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-08 03:12:45,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 03:12:45,619 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-08 03:12:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:50,437 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-08 03:12:50,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-08 03:12:50,438 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-08 03:12:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:50,439 INFO L225 Difference]: With dead ends: 96 [2019-09-08 03:12:50,439 INFO L226 Difference]: Without dead ends: 93 [2019-09-08 03:12:50,439 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 03:12:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-08 03:12:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-08 03:12:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-08 03:12:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-08 03:12:50,449 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-08 03:12:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:50,449 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-08 03:12:50,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-08 03:12:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-08 03:12:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-08 03:12:50,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:50,450 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:50,450 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-09-08 03:12:50,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:50,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:50,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:50,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:50,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:50,456 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:50,456 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:50,457 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:50,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:13:26,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-08 03:13:26,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:26,514 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-08 03:13:26,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:29,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:30,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:30,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-08 03:13:30,014 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-08 03:13:30,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-08 03:13:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 03:13:30,015 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-08 03:13:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:35,024 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-08 03:13:35,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-08 03:13:35,025 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-08 03:13:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:35,025 INFO L225 Difference]: With dead ends: 97 [2019-09-08 03:13:35,025 INFO L226 Difference]: Without dead ends: 94 [2019-09-08 03:13:35,026 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 03:13:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-08 03:13:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-08 03:13:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-08 03:13:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-08 03:13:35,034 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-08 03:13:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:35,034 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-08 03:13:35,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-08 03:13:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-08 03:13:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 03:13:35,035 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:35,035 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:35,035 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-09-08 03:13:35,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:35,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:35,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:35,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:35,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:35,042 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:35,043 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:35,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:35,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:13:36,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:13:36,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:36,243 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-08 03:13:36,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:39,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:39,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:39,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-08 03:13:39,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-08 03:13:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-08 03:13:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 03:13:39,713 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-08 03:13:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:44,950 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-08 03:13:44,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-08 03:13:44,950 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-08 03:13:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:44,950 INFO L225 Difference]: With dead ends: 98 [2019-09-08 03:13:44,951 INFO L226 Difference]: Without dead ends: 95 [2019-09-08 03:13:44,951 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 03:13:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-08 03:13:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-08 03:13:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-08 03:13:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-08 03:13:44,959 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-08 03:13:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:44,959 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-08 03:13:44,959 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-08 03:13:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-08 03:13:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-08 03:13:44,960 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:44,960 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:44,961 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-09-08 03:13:44,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:44,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:44,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:44,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:44,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:44,967 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:44,967 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:44,967 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:44,976 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:13:45,414 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-08 03:13:45,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:45,421 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-08 03:13:45,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:48,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:13:49,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:49,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-08 03:13:49,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 03:13:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 03:13:49,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 03:13:49,060 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-08 03:13:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:54,558 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-08 03:13:54,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-08 03:13:54,559 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-08 03:13:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:54,559 INFO L225 Difference]: With dead ends: 99 [2019-09-08 03:13:54,559 INFO L226 Difference]: Without dead ends: 96 [2019-09-08 03:13:54,560 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 03:13:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-08 03:13:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-08 03:13:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-08 03:13:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-08 03:13:54,568 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-08 03:13:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:54,568 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-08 03:13:54,568 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 03:13:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-08 03:13:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-08 03:13:54,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:54,569 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:54,569 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-09-08 03:13:54,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:54,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:54,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:54,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:54,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:54,575 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:54,576 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:54,576 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:54,587 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:14:01,969 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-08 03:14:01,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:01,979 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-08 03:14:01,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:05,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:05,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:05,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-08 03:14:05,692 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-08 03:14:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-08 03:14:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 03:14:05,693 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-08 03:14:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:11,199 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-08 03:14:11,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-08 03:14:11,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-08 03:14:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:11,201 INFO L225 Difference]: With dead ends: 100 [2019-09-08 03:14:11,201 INFO L226 Difference]: Without dead ends: 97 [2019-09-08 03:14:11,202 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 03:14:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-08 03:14:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-08 03:14:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-08 03:14:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-08 03:14:11,210 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-08 03:14:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:11,211 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-08 03:14:11,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-08 03:14:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-08 03:14:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 03:14:11,212 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:11,212 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:11,212 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-09-08 03:14:11,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:11,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:11,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:11,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:11,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:11,222 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:11,222 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:11,223 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:11,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:14:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:14:11,576 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-08 03:14:11,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:15,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:14:15,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:15,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-08 03:14:15,349 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-08 03:14:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-08 03:14:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 03:14:15,350 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-08 03:14:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:21,001 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-08 03:14:21,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-08 03:14:21,001 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-08 03:14:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:21,003 INFO L225 Difference]: With dead ends: 101 [2019-09-08 03:14:21,004 INFO L226 Difference]: Without dead ends: 98 [2019-09-08 03:14:21,004 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 03:14:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-08 03:14:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-08 03:14:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-08 03:14:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-08 03:14:21,013 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-08 03:14:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:21,014 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-08 03:14:21,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-08 03:14:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-08 03:14:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-08 03:14:21,014 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:21,014 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:21,015 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-09-08 03:14:21,015 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:21,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:21,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:21,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:14:21,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:21,023 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:21,023 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:21,023 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:14:21,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:21,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:14:21,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:21,398 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-08 03:14:21,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:25,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:25,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:25,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-08 03:14:25,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-08 03:14:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-08 03:14:25,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 03:14:25,238 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-08 03:14:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:31,004 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-08 03:14:31,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-08 03:14:31,004 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-08 03:14:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:31,005 INFO L225 Difference]: With dead ends: 102 [2019-09-08 03:14:31,005 INFO L226 Difference]: Without dead ends: 99 [2019-09-08 03:14:31,005 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 03:14:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-08 03:14:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-08 03:14:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-08 03:14:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-08 03:14:31,013 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-08 03:14:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:31,013 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-08 03:14:31,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-08 03:14:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-08 03:14:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-08 03:14:31,014 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:31,014 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:31,014 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-09-08 03:14:31,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:31,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:31,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:31,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:31,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:31,023 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:31,023 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:31,023 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:31,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:15:22,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-08 03:15:22,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:22,952 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-08 03:15:22,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:26,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:26,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:26,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-08 03:15:26,993 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-08 03:15:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-08 03:15:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 03:15:26,994 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-08 03:15:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:32,870 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-08 03:15:32,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-08 03:15:32,871 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-08 03:15:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:32,871 INFO L225 Difference]: With dead ends: 103 [2019-09-08 03:15:32,872 INFO L226 Difference]: Without dead ends: 100 [2019-09-08 03:15:32,872 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 03:15:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-08 03:15:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-08 03:15:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-08 03:15:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-08 03:15:32,880 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-08 03:15:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:32,881 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-08 03:15:32,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-08 03:15:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-08 03:15:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-08 03:15:32,881 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:32,881 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:32,881 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:32,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:32,882 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-09-08 03:15:32,882 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:32,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:32,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:32,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:15:32,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:32,890 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:32,890 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:32,890 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:15:32,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:34,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:15:34,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:34,254 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-08 03:15:34,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:38,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:38,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:38,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-08 03:15:38,253 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-08 03:15:38,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-08 03:15:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 03:15:38,253 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-08 03:15:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:44,295 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-08 03:15:44,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-08 03:15:44,295 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-08 03:15:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:44,296 INFO L225 Difference]: With dead ends: 104 [2019-09-08 03:15:44,296 INFO L226 Difference]: Without dead ends: 101 [2019-09-08 03:15:44,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 03:15:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-08 03:15:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-08 03:15:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-08 03:15:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-08 03:15:44,305 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-08 03:15:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:44,305 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-08 03:15:44,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-08 03:15:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-08 03:15:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 03:15:44,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:44,305 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:44,306 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-09-08 03:15:44,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:44,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:44,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:44,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:15:44,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:44,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:44,313 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:44,314 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:44,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:15:44,850 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-08 03:15:44,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:44,857 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-08 03:15:44,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:48,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:49,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:49,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-08 03:15:49,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-08 03:15:49,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-08 03:15:49,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 03:15:49,099 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-08 03:15:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:55,428 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-08 03:15:55,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-08 03:15:55,429 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-08 03:15:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:55,430 INFO L225 Difference]: With dead ends: 105 [2019-09-08 03:15:55,430 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 03:15:55,430 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-09-08 03:15:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 03:15:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-08 03:15:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-08 03:15:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-08 03:15:55,438 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-08 03:15:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:55,438 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-08 03:15:55,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-08 03:15:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-08 03:15:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-08 03:15:55,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:55,439 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:55,439 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-09-08 03:15:55,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:55,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:55,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:55,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:15:55,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:55,448 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:55,448 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:55,448 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:55,475 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:16:07,364 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-08 03:16:07,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:16:07,375 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-08 03:16:07,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:11,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:16:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:11,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:16:11,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-08 03:16:11,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-08 03:16:11,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-08 03:16:11,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-08 03:16:11,577 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-08 03:16:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:17,827 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-08 03:16:17,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-08 03:16:17,827 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-08 03:16:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:17,828 INFO L225 Difference]: With dead ends: 106 [2019-09-08 03:16:17,828 INFO L226 Difference]: Without dead ends: 103 [2019-09-08 03:16:17,829 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 03:16:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-08 03:16:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-08 03:16:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-08 03:16:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-08 03:16:17,838 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-08 03:16:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:17,838 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-08 03:16:17,839 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-08 03:16:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-08 03:16:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-08 03:16:17,839 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:17,839 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:17,840 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-09-08 03:16:17,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:17,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:17,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:17,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:16:17,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:17,849 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:16:17,849 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:16:17,849 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:17,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:16:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:16:18,265 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-08 03:16:18,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:22,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:16:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:22,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:16:22,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-08 03:16:22,536 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 03:16:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 03:16:22,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 03:16:22,537 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-08 03:16:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:28,943 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-08 03:16:28,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-08 03:16:28,944 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-08 03:16:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:28,945 INFO L225 Difference]: With dead ends: 107 [2019-09-08 03:16:28,945 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 03:16:28,945 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 03:16:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 03:16:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-08 03:16:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-08 03:16:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-08 03:16:28,956 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-08 03:16:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:28,956 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-08 03:16:28,956 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 03:16:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-08 03:16:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-08 03:16:28,957 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:28,957 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:28,957 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-09-08 03:16:28,958 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:28,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:28,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:28,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:16:28,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:28,965 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:16:28,965 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:16:28,965 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:28,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:16:29,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:16:29,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:16:29,366 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-08 03:16:29,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:33,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:16:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:33,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:16:33,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-08 03:16:33,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-08 03:16:33,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-08 03:16:33,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 03:16:33,712 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-08 03:16:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:40,294 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-08 03:16:40,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-08 03:16:40,295 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-08 03:16:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:40,296 INFO L225 Difference]: With dead ends: 108 [2019-09-08 03:16:40,296 INFO L226 Difference]: Without dead ends: 105 [2019-09-08 03:16:40,297 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 03:16:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-08 03:16:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-08 03:16:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-08 03:16:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-08 03:16:40,308 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-08 03:16:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:40,308 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-08 03:16:40,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-08 03:16:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-08 03:16:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-08 03:16:40,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:40,309 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:40,310 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:40,310 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-09-08 03:16:40,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:40,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:40,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:40,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:16:40,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:40,319 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:16:40,319 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:16:40,319 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:40,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:17:51,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-08 03:17:51,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:51,546 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-08 03:17:51,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:56,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:56,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:56,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-08 03:17:56,124 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-08 03:17:56,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-08 03:17:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 03:17:56,125 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-08 03:18:02,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:02,947 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-08 03:18:02,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-08 03:18:02,947 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-08 03:18:02,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:02,948 INFO L225 Difference]: With dead ends: 109 [2019-09-08 03:18:02,948 INFO L226 Difference]: Without dead ends: 106 [2019-09-08 03:18:02,949 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 03:18:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-08 03:18:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-08 03:18:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-08 03:18:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-08 03:18:02,960 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-08 03:18:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:02,961 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-08 03:18:02,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-08 03:18:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-08 03:18:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-08 03:18:02,961 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:02,962 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:02,962 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:02,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-09-08 03:18:02,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:02,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:02,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:02,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:02,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:02,971 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:02,971 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:02,971 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:18:02,989 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:04,521 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:18:04,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:04,527 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-08 03:18:04,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:08,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:09,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:09,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-08 03:18:09,077 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-08 03:18:09,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-08 03:18:09,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 03:18:09,078 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-08 03:18:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:15,963 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-08 03:18:15,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-08 03:18:15,963 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-08 03:18:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:15,964 INFO L225 Difference]: With dead ends: 110 [2019-09-08 03:18:15,964 INFO L226 Difference]: Without dead ends: 107 [2019-09-08 03:18:15,965 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 03:18:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-08 03:18:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-08 03:18:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-08 03:18:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-08 03:18:15,976 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-08 03:18:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:15,976 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-08 03:18:15,976 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-08 03:18:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-08 03:18:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-08 03:18:15,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:15,977 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:15,977 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-09-08 03:18:15,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:15,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:15,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:15,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:15,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:15,987 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:15,987 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:15,987 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:16,016 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:18:16,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-08 03:18:16,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:16,605 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-08 03:18:16,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:21,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:21,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:21,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-08 03:18:21,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-08 03:18:21,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-08 03:18:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 03:18:21,372 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-08 03:18:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:28,269 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-08 03:18:28,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-08 03:18:28,269 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-08 03:18:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:28,270 INFO L225 Difference]: With dead ends: 111 [2019-09-08 03:18:28,271 INFO L226 Difference]: Without dead ends: 108 [2019-09-08 03:18:28,271 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 03:18:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-08 03:18:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-08 03:18:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-08 03:18:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-08 03:18:28,284 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-08 03:18:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:28,284 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-08 03:18:28,284 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-08 03:18:28,284 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-08 03:18:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 03:18:28,285 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:28,285 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:28,285 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-09-08 03:18:28,286 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:28,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:28,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:28,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:28,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:28,294 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:28,294 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:28,294 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:28,317 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:18:42,667 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-08 03:18:42,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:42,679 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-08 03:18:42,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:47,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:47,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:47,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-08 03:18:47,271 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-08 03:18:47,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-08 03:18:47,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 03:18:47,272 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-08 03:18:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:54,318 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-08 03:18:54,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-08 03:18:54,319 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-08 03:18:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:54,320 INFO L225 Difference]: With dead ends: 112 [2019-09-08 03:18:54,320 INFO L226 Difference]: Without dead ends: 109 [2019-09-08 03:18:54,321 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 03:18:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-08 03:18:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-08 03:18:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-08 03:18:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-08 03:18:54,331 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-08 03:18:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:54,331 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-08 03:18:54,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-08 03:18:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-08 03:18:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-08 03:18:54,332 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:54,332 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:54,333 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-09-08 03:18:54,333 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:54,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:54,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:54,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:54,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:54,341 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:54,341 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:54,341 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:54,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:54,810 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-08 03:18:54,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:59,493 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:59,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:59,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-08 03:18:59,599 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-08 03:18:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-08 03:18:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 03:18:59,600 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-08 03:19:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:19:06,857 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-08 03:19:06,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-08 03:19:06,858 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-08 03:19:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:19:06,858 INFO L225 Difference]: With dead ends: 113 [2019-09-08 03:19:06,858 INFO L226 Difference]: Without dead ends: 110 [2019-09-08 03:19:06,859 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 03:19:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-08 03:19:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-08 03:19:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-08 03:19:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-08 03:19:06,867 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-08 03:19:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:19:06,867 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-08 03:19:06,867 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-08 03:19:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-08 03:19:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 03:19:06,868 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:19:06,868 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:19:06,868 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:19:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:19:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-09-08 03:19:06,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:19:06,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:19:06,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:06,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:19:06,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:06,877 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:19:06,878 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:19:06,878 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:19:06,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:19:07,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:19:07,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:19:07,440 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-08 03:19:07,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:19:12,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:19:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:19:12,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:19:12,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-08 03:19:12,310 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-08 03:19:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-08 03:19:12,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 03:19:12,311 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-08 03:19:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:19:19,669 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-08 03:19:19,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-08 03:19:19,670 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-08 03:19:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:19:19,671 INFO L225 Difference]: With dead ends: 114 [2019-09-08 03:19:19,671 INFO L226 Difference]: Without dead ends: 111 [2019-09-08 03:19:19,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 03:19:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-08 03:19:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-08 03:19:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-08 03:19:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-08 03:19:19,680 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-08 03:19:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:19:19,681 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-08 03:19:19,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-08 03:19:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-08 03:19:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-08 03:19:19,681 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:19:19,681 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:19:19,681 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:19:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:19:19,682 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-09-08 03:19:19,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:19:19,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:19:19,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:19,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:19:19,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:19,690 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:19:19,690 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:19:19,690 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:19:19,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2