/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:42:54,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:42:54,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:42:54,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:42:54,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:42:54,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:42:54,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:42:54,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:42:54,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:42:54,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:42:54,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:42:54,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:42:54,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:42:54,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:42:54,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:42:54,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:42:54,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:42:54,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:42:54,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:42:54,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:42:54,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:42:54,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:42:54,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:42:54,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:42:54,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:42:54,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:42:54,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:42:54,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:42:54,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:42:54,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:42:54,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:42:54,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:42:54,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:42:54,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:42:54,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:42:54,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:42:54,329 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 [2019-11-23 20:42:54,352 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:42:54,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:42:54,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:42:54,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:42:54,354 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:42:54,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:42:54,354 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:42:54,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:42:54,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:42:54,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:42:54,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:42:54,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:42:54,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:42:54,357 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:42:54,357 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:42:54,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:42:54,357 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:42:54,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:42:54,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:42:54,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:42:54,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:42:54,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:42:54,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:42:54,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:42:54,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:42:54,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:42:54,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:42:54,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:42:54,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:42:54,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:42:54,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:42:54,708 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:42:54,713 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:42:54,715 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:42:54,715 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:42:54,716 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-11-23 20:42:54,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b5cc418/dc501e4a9e6f44e09f4c7abc48ca07fb/FLAG32fc72bf5 [2019-11-23 20:42:55,233 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:42:55,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-11-23 20:42:55,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b5cc418/dc501e4a9e6f44e09f4c7abc48ca07fb/FLAG32fc72bf5 [2019-11-23 20:42:55,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b5cc418/dc501e4a9e6f44e09f4c7abc48ca07fb [2019-11-23 20:42:55,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:42:55,620 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:42:55,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:55,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:42:55,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:42:55,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:55,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed33e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55, skipping insertion in model container [2019-11-23 20:42:55,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:55,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:42:55,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:42:55,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:55,857 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:42:55,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:55,901 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:42:55,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55 WrapperNode [2019-11-23 20:42:55,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:55,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:55,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:42:55,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:42:55,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:56,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:42:56,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:42:56,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:42:56,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (1/1) ... [2019-11-23 20:42:56,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:42:56,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:42:56,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:42:56,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:42:56,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (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 [2019-11-23 20:42:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:42:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:42:56,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:42:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:42:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:42:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:42:56,387 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:42:56,388 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:42:56,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:56 BoogieIcfgContainer [2019-11-23 20:42:56,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:42:56,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:42:56,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:42:56,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:42:56,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:42:55" (1/3) ... [2019-11-23 20:42:56,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1829a97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:56, skipping insertion in model container [2019-11-23 20:42:56,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:55" (2/3) ... [2019-11-23 20:42:56,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1829a97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:56, skipping insertion in model container [2019-11-23 20:42:56,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:56" (3/3) ... [2019-11-23 20:42:56,413 INFO L109 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2019-11-23 20:42:56,438 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:42:56,447 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:42:56,459 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:42:56,487 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:42:56,487 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:42:56,487 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:42:56,487 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:42:56,487 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:42:56,488 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:42:56,488 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:42:56,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:42:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-23 20:42:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:42:56,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:56,514 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:56,514 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2019-11-23 20:42:56,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:56,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265370554] [2019-11-23 20:42:56,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:56,599 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:56,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773432965] [2019-11-23 20:42:56,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:42:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:56,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:42:56,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:56,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265370554] [2019-11-23 20:42:56,677 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:56,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773432965] [2019-11-23 20:42:56,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:56,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:42:56,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029496046] [2019-11-23 20:42:56,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:42:56,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:42:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:42:56,701 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-23 20:42:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:56,724 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2019-11-23 20:42:56,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:42:56,726 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:42:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:56,736 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:42:56,736 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:42:56,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:42:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:42:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 20:42:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:42:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-23 20:42:56,781 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2019-11-23 20:42:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:56,782 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-23 20:42:56,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:42:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-23 20:42:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:42:56,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:56,784 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:56,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:56,987 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2019-11-23 20:42:56,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:56,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979085890] [2019-11-23 20:42:56,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:57,006 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:57,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292203944] [2019-11-23 20:42:57,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:42:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:57,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:57,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:57,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979085890] [2019-11-23 20:42:57,103 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:57,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292203944] [2019-11-23 20:42:57,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:57,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:42:57,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272214339] [2019-11-23 20:42:57,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:42:57,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:57,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:42:57,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:42:57,106 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2019-11-23 20:42:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:57,161 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2019-11-23 20:42:57,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:42:57,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:42:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:57,163 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:42:57,163 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:42:57,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:42:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:42:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-23 20:42:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:42:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2019-11-23 20:42:57,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2019-11-23 20:42:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:57,172 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2019-11-23 20:42:57,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:42:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2019-11-23 20:42:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:42:57,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:57,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:57,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:57,380 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2019-11-23 20:42:57,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:57,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989344989] [2019-11-23 20:42:57,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:57,396 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:57,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22656157] [2019-11-23 20:42:57,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:57,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:57,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:57,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989344989] [2019-11-23 20:42:57,468 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:57,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22656157] [2019-11-23 20:42:57,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:57,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:57,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073063880] [2019-11-23 20:42:57,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:57,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:57,473 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 4 states. [2019-11-23 20:42:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:57,580 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2019-11-23 20:42:57,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:57,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:42:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:57,582 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:42:57,582 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:42:57,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:42:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2019-11-23 20:42:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:42:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2019-11-23 20:42:57,591 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2019-11-23 20:42:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:57,591 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2019-11-23 20:42:57,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2019-11-23 20:42:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:42:57,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:57,593 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:57,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:57,797 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:57,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2019-11-23 20:42:57,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:57,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138397148] [2019-11-23 20:42:57,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:57,806 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:57,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944791678] [2019-11-23 20:42:57,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:42:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:57,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:57,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:57,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138397148] [2019-11-23 20:42:57,885 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:57,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944791678] [2019-11-23 20:42:57,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:57,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:57,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884959983] [2019-11-23 20:42:57,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:57,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:57,888 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2019-11-23 20:42:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:57,961 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2019-11-23 20:42:57,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:57,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:42:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:57,963 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:42:57,963 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:42:57,963 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:42:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-11-23 20:42:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:42:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-11-23 20:42:57,972 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2019-11-23 20:42:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:57,972 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-11-23 20:42:57,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-11-23 20:42:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:42:57,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:57,973 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:58,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:58,177 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:58,177 INFO L82 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2019-11-23 20:42:58,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:58,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694063627] [2019-11-23 20:42:58,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:58,184 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:58,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141720498] [2019-11-23 20:42:58,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:58,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:58,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:58,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694063627] [2019-11-23 20:42:58,251 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:58,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141720498] [2019-11-23 20:42:58,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:58,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:42:58,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799246610] [2019-11-23 20:42:58,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:58,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:58,253 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2019-11-23 20:42:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:58,348 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2019-11-23 20:42:58,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:58,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-23 20:42:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:58,349 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:42:58,349 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:42:58,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:42:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2019-11-23 20:42:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:42:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-11-23 20:42:58,363 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2019-11-23 20:42:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:58,363 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-11-23 20:42:58,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-11-23 20:42:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:42:58,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:58,365 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:58,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:58,569 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1771086529, now seen corresponding path program 2 times [2019-11-23 20:42:58,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:58,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447574706] [2019-11-23 20:42:58,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:58,575 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:58,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082325186] [2019-11-23 20:42:58,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2019-11-23 20:42:58,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:42:58,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:58,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:58,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:42:58,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447574706] [2019-11-23 20:42:58,637 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:58,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082325186] [2019-11-23 20:42:58,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:58,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:58,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290572107] [2019-11-23 20:42:58,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:58,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:58,639 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2019-11-23 20:42:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:58,702 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2019-11-23 20:42:58,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:58,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:42:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:58,703 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:42:58,703 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:42:58,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:42:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2019-11-23 20:42:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:42:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-11-23 20:42:58,712 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 19 [2019-11-23 20:42:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:58,713 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-11-23 20:42:58,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-11-23 20:42:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:42:58,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:58,714 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:58,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:58,917 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:58,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1618381713, now seen corresponding path program 1 times [2019-11-23 20:42:58,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:58,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289617401] [2019-11-23 20:42:58,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:58,932 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:58,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001112258] [2019-11-23 20:42:58,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:59,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:42:59,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:42:59,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289617401] [2019-11-23 20:42:59,043 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:59,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001112258] [2019-11-23 20:42:59,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:59,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:42:59,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643661327] [2019-11-23 20:42:59,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:42:59,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:59,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:42:59,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:59,045 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2019-11-23 20:42:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:59,133 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2019-11-23 20:42:59,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:42:59,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-11-23 20:42:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:59,134 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:42:59,134 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:42:59,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:42:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2019-11-23 20:42:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:42:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2019-11-23 20:42:59,144 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 31 [2019-11-23 20:42:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:59,145 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2019-11-23 20:42:59,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:42:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2019-11-23 20:42:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:42:59,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:59,146 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:59,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:59,358 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash -440379608, now seen corresponding path program 2 times [2019-11-23 20:42:59,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:59,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652188083] [2019-11-23 20:42:59,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:59,366 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:59,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508972836] [2019-11-23 20:42:59,367 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 20:42:59,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:59,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:59,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:42:59,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:42:59,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652188083] [2019-11-23 20:42:59,474 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:59,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508972836] [2019-11-23 20:42:59,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:59,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:42:59,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86731666] [2019-11-23 20:42:59,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:42:59,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:42:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:59,477 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2019-11-23 20:42:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:59,576 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2019-11-23 20:42:59,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:42:59,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-23 20:42:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:59,578 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:42:59,578 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:42:59,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:42:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2019-11-23 20:42:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:42:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-11-23 20:42:59,589 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 35 [2019-11-23 20:42:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:59,589 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-11-23 20:42:59,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:42:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-11-23 20:42:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:42:59,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:59,591 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:59,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:59,796 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 3 times [2019-11-23 20:42:59,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:59,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408784953] [2019-11-23 20:42:59,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:59,807 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:59,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179885600] [2019-11-23 20:42:59,808 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:42:59,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:42:59,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:59,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:59,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:42:59,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408784953] [2019-11-23 20:42:59,909 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:59,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179885600] [2019-11-23 20:42:59,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:59,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:42:59,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488038809] [2019-11-23 20:42:59,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:59,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:59,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:59,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:59,911 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2019-11-23 20:42:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:59,948 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2019-11-23 20:42:59,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:59,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-23 20:42:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:59,951 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:42:59,951 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:42:59,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:42:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-23 20:42:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:42:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2019-11-23 20:42:59,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 39 [2019-11-23 20:42:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:59,974 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2019-11-23 20:42:59,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2019-11-23 20:42:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:42:59,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:59,979 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:00,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:00,182 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1913562003, now seen corresponding path program 4 times [2019-11-23 20:43:00,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:00,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260238018] [2019-11-23 20:43:00,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:00,188 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:00,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318041581] [2019-11-23 20:43:00,189 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-23 20:43:00,233 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:43:00,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:00,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:43:00,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:00,315 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-23 20:43:00,316 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:43:00,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:43:00,322 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:43:00,322 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-23 20:43:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:43:00,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260238018] [2019-11-23 20:43:00,333 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:00,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318041581] [2019-11-23 20:43:00,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:00,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 20:43:00,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789237092] [2019-11-23 20:43:00,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:43:00,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:43:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:43:00,336 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 6 states. [2019-11-23 20:43:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:00,421 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2019-11-23 20:43:00,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:43:00,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-23 20:43:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:00,422 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:43:00,422 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:43:00,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:43:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:43:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2019-11-23 20:43:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:43:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2019-11-23 20:43:00,442 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 49 [2019-11-23 20:43:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:00,443 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2019-11-23 20:43:00,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:43:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2019-11-23 20:43:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:43:00,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:00,447 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:00,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:00,649 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1694707285, now seen corresponding path program 1 times [2019-11-23 20:43:00,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:00,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003824359] [2019-11-23 20:43:00,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:00,654 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:00,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903827410] [2019-11-23 20:43:00,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:43:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:00,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:43:00,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:43:00,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003824359] [2019-11-23 20:43:00,781 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:00,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903827410] [2019-11-23 20:43:00,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:00,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:43:00,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652028775] [2019-11-23 20:43:00,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:43:00,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:00,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:43:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:43:00,786 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand 8 states. [2019-11-23 20:43:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:00,898 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2019-11-23 20:43:00,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:43:00,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-11-23 20:43:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:00,899 INFO L225 Difference]: With dead ends: 153 [2019-11-23 20:43:00,900 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 20:43:00,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:43:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 20:43:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2019-11-23 20:43:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:43:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2019-11-23 20:43:00,920 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 49 [2019-11-23 20:43:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:00,920 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2019-11-23 20:43:00,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:43:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2019-11-23 20:43:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:43:00,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:00,927 INFO L410 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:01,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:01,133 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1125890749, now seen corresponding path program 2 times [2019-11-23 20:43:01,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:01,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667166615] [2019-11-23 20:43:01,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:01,139 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:01,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152685646] [2019-11-23 20:43:01,140 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 20:43:01,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:43:01,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:01,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:43:01,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-23 20:43:01,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667166615] [2019-11-23 20:43:01,268 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:01,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152685646] [2019-11-23 20:43:01,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:01,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:43:01,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189120073] [2019-11-23 20:43:01,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:43:01,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:43:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:43:01,270 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 9 states. [2019-11-23 20:43:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:01,374 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2019-11-23 20:43:01,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:43:01,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2019-11-23 20:43:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:01,375 INFO L225 Difference]: With dead ends: 171 [2019-11-23 20:43:01,375 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:43:01,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:43:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:43:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-11-23 20:43:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:43:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2019-11-23 20:43:01,387 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 54 [2019-11-23 20:43:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:01,387 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2019-11-23 20:43:01,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:43:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2019-11-23 20:43:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:43:01,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:01,388 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:01,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:01,598 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:01,599 INFO L82 PathProgramCache]: Analyzing trace with hash 44580715, now seen corresponding path program 3 times [2019-11-23 20:43:01,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:01,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105284532] [2019-11-23 20:43:01,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:01,605 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:01,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469973833] [2019-11-23 20:43:01,605 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:43:01,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:43:01,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:01,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:43:01,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-23 20:43:01,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105284532] [2019-11-23 20:43:01,687 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:01,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469973833] [2019-11-23 20:43:01,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:01,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:43:01,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291354198] [2019-11-23 20:43:01,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:43:01,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:43:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:43:01,689 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 5 states. [2019-11-23 20:43:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:01,759 INFO L93 Difference]: Finished difference Result 219 states and 280 transitions. [2019-11-23 20:43:01,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:43:01,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2019-11-23 20:43:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:01,761 INFO L225 Difference]: With dead ends: 219 [2019-11-23 20:43:01,761 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:43:01,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:43:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:43:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 106. [2019-11-23 20:43:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 20:43:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2019-11-23 20:43:01,782 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 59 [2019-11-23 20:43:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:01,783 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2019-11-23 20:43:01,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:43:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2019-11-23 20:43:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:43:01,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:01,786 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:01,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:01,989 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash -925001317, now seen corresponding path program 4 times [2019-11-23 20:43:01,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:01,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520788597] [2019-11-23 20:43:01,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:01,996 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:01,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004991835] [2019-11-23 20:43:01,996 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:02,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:43:02,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:02,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 20:43:02,063 INFO L278 TraceCheckSpWp]: Computing forward predicates...