/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-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:42:47,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:42:47,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:42:47,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:42:47,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:42:47,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:42:47,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:42:47,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:42:47,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:42:47,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:42:47,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:42:47,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:42:47,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:42:47,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:42:47,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:42:47,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:42:47,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:42:47,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:42:47,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:42:47,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:42:47,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:42:47,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:42:47,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:42:47,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:42:47,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:42:47,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:42:47,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:42:47,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:42:47,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:42:47,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:42:47,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:42:47,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:42:47,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:42:47,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:42:47,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:42:47,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:42:47,319 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 20:42:47,353 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:42:47,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:42:47,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:42:47,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:42:47,355 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:42:47,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:42:47,359 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:42:47,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:42:47,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:42:47,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:42:47,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:42:47,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:42:47,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:42:47,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:42:47,361 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:42:47,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:42:47,362 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:42:47,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:42:47,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:42:47,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:42:47,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:42:47,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:42:47,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:42:47,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:42:47,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:42:47,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:42:47,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:42:47,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:42:47,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:42:47,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:42:47,661 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:42:47,671 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:42:47,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:42:47,676 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:42:47,676 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:42:47,677 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-11-23 20:42:47,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2775bf229/69f06c2fcc8746dda107bb3c8e0f4821/FLAGa0ebb7e36 [2019-11-23 20:42:48,107 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:42:48,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-11-23 20:42:48,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2775bf229/69f06c2fcc8746dda107bb3c8e0f4821/FLAGa0ebb7e36 [2019-11-23 20:42:48,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2775bf229/69f06c2fcc8746dda107bb3c8e0f4821 [2019-11-23 20:42:48,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:42:48,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:42:48,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:48,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:42:48,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:42:48,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2a172a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48, skipping insertion in model container [2019-11-23 20:42:48,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:42:48,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:42:48,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:48,723 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:42:48,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:48,768 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:42:48,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48 WrapperNode [2019-11-23 20:42:48,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:48,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:48,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:42:48,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:42:48,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:48,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:42:48,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:42:48,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:42:48,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (1/1) ... [2019-11-23 20:42:48,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:42:48,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:42:48,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:42:48,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:42:48,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (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 20:42:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:42:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:42:49,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:42:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:42:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:42:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:42:49,347 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:42:49,347 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:42:49,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:49 BoogieIcfgContainer [2019-11-23 20:42:49,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:42:49,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:42:49,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:42:49,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:42:49,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:42:48" (1/3) ... [2019-11-23 20:42:49,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657f452c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:49, skipping insertion in model container [2019-11-23 20:42:49,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:48" (2/3) ... [2019-11-23 20:42:49,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657f452c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:49, skipping insertion in model container [2019-11-23 20:42:49,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:49" (3/3) ... [2019-11-23 20:42:49,361 INFO L109 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2019-11-23 20:42:49,368 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:42:49,375 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:42:49,386 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:42:49,406 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:42:49,406 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:42:49,406 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:42:49,406 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:42:49,406 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:42:49,407 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:42:49,407 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:42:49,407 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:42:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 20:42:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:42:49,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:49,425 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:49,426 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2019-11-23 20:42:49,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:49,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116819950] [2019-11-23 20:42:49,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:49,514 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:49,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473181623] [2019-11-23 20:42:49,515 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 20:42:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:49,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:49,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:49,616 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 20:42:49,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116819950] [2019-11-23 20:42:49,619 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:49,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473181623] [2019-11-23 20:42:49,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:49,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:42:49,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138423379] [2019-11-23 20:42:49,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:42:49,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:42:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:42:49,641 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-23 20:42:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:49,718 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2019-11-23 20:42:49,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:42:49,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:42:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:49,730 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:42:49,730 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:42:49,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 20:42:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:42:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-23 20:42:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:42:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2019-11-23 20:42:49,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2019-11-23 20:42:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:49,771 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2019-11-23 20:42:49,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:42:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2019-11-23 20:42:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:42:49,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:49,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:49,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:49,974 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:49,975 INFO L82 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2019-11-23 20:42:49,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:49,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575749270] [2019-11-23 20:42:49,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:49,984 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:49,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806118095] [2019-11-23 20:42:49,985 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 20:42:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:50,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:50,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:50,056 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 20:42:50,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575749270] [2019-11-23 20:42:50,057 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:50,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806118095] [2019-11-23 20:42:50,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:50,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:50,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288604294] [2019-11-23 20:42:50,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:50,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:50,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:50,061 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 4 states. [2019-11-23 20:42:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:50,151 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2019-11-23 20:42:50,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:50,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:42:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:50,154 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:42:50,155 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:42:50,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 20:42:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:42:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2019-11-23 20:42:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:42:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-23 20:42:50,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2019-11-23 20:42:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:50,169 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-23 20:42:50,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:50,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2019-11-23 20:42:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:42:50,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:50,172 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:50,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:50,379 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:50,379 INFO L82 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2019-11-23 20:42:50,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:50,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709101721] [2019-11-23 20:42:50,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:50,385 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:50,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974724066] [2019-11-23 20:42:50,388 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 20:42:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:50,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:50,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:50,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709101721] [2019-11-23 20:42:50,482 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:50,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974724066] [2019-11-23 20:42:50,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:50,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:42:50,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80017047] [2019-11-23 20:42:50,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:50,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:50,485 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 5 states. [2019-11-23 20:42:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:50,590 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2019-11-23 20:42:50,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:50,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:42:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:50,592 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:42:50,592 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:42:50,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 20:42:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:42:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2019-11-23 20:42:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:42:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-23 20:42:50,601 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2019-11-23 20:42:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:50,602 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-23 20:42:50,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-23 20:42:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:42:50,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:50,603 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:50,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:50,807 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash -477019482, now seen corresponding path program 2 times [2019-11-23 20:42:50,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:50,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261432592] [2019-11-23 20:42:50,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:50,815 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:50,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643118346] [2019-11-23 20:42:50,816 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 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 20:42:50,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:42:50,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:50,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:50,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:42:50,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261432592] [2019-11-23 20:42:50,882 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:50,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643118346] [2019-11-23 20:42:50,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:50,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:50,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564464760] [2019-11-23 20:42:50,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:50,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:50,889 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2019-11-23 20:42:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:50,938 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-11-23 20:42:50,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:50,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:42:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:50,940 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:42:50,940 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:42:50,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 20:42:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:42:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2019-11-23 20:42:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:42:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-23 20:42:50,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2019-11-23 20:42:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:50,949 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-23 20:42:50,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-23 20:42:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:42:50,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:50,950 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] [2019-11-23 20:42:51,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:51,152 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1114279158, now seen corresponding path program 1 times [2019-11-23 20:42:51,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:51,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250959776] [2019-11-23 20:42:51,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:51,159 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:51,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018786440] [2019-11-23 20:42:51,159 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 20:42:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:51,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:42:51,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:42:51,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250959776] [2019-11-23 20:42:51,245 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:51,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018786440] [2019-11-23 20:42:51,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:51,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:42:51,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250331907] [2019-11-23 20:42:51,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:42:51,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:51,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:42:51,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:51,248 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 6 states. [2019-11-23 20:42:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:51,343 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2019-11-23 20:42:51,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:42:51,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-23 20:42:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:51,345 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:42:51,345 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:42:51,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:42:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:42:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2019-11-23 20:42:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:42:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2019-11-23 20:42:51,354 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2019-11-23 20:42:51,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:51,354 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2019-11-23 20:42:51,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:42:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2019-11-23 20:42:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:42:51,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:51,355 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] [2019-11-23 20:42:51,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:51,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:51,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1632092484, now seen corresponding path program 2 times [2019-11-23 20:42:51,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:51,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407028648] [2019-11-23 20:42:51,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:51,566 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:51,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116922468] [2019-11-23 20:42:51,566 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:51,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:51,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:51,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:42:51,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:42:51,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407028648] [2019-11-23 20:42:51,658 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:51,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116922468] [2019-11-23 20:42:51,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:51,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:42:51,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065017286] [2019-11-23 20:42:51,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:42:51,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:42:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:51,661 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2019-11-23 20:42:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:51,778 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2019-11-23 20:42:51,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:42:51,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-11-23 20:42:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:51,779 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:42:51,779 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:42:51,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 20:42:51,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:42:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2019-11-23 20:42:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:42:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2019-11-23 20:42:51,789 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 28 [2019-11-23 20:42:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:51,789 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2019-11-23 20:42:51,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:42:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2019-11-23 20:42:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:42:51,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:51,790 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] [2019-11-23 20:42:51,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:51,994 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:51,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 3 times [2019-11-23 20:42:51,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:51,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920180137] [2019-11-23 20:42:51,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:52,000 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:52,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245736859] [2019-11-23 20:42:52,000 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 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 20:42:52,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:42:52,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:52,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:52,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:42:52,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920180137] [2019-11-23 20:42:52,070 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:52,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245736859] [2019-11-23 20:42:52,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:52,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:42:52,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960811432] [2019-11-23 20:42:52,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:52,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:52,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:52,075 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 4 states. [2019-11-23 20:42:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:52,114 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2019-11-23 20:42:52,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:52,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-23 20:42:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:52,117 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:42:52,118 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:42:52,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 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 20:42:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:42:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-11-23 20:42:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:42:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2019-11-23 20:42:52,129 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 32 [2019-11-23 20:42:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:52,129 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2019-11-23 20:42:52,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2019-11-23 20:42:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:42:52,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:52,131 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:52,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:52,332 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:52,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash -709845727, now seen corresponding path program 4 times [2019-11-23 20:42:52,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:52,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728516710] [2019-11-23 20:42:52,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:52,339 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:52,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997016478] [2019-11-23 20:42:52,340 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 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 20:42:52,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:42:52,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:52,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:42:52,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:42:52,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728516710] [2019-11-23 20:42:52,488 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:52,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997016478] [2019-11-23 20:42:52,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:52,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:42:52,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615729151] [2019-11-23 20:42:52,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:42:52,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:42:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:52,490 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 9 states. [2019-11-23 20:42:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:52,673 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2019-11-23 20:42:52,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:42:52,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-11-23 20:42:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:52,675 INFO L225 Difference]: With dead ends: 145 [2019-11-23 20:42:52,675 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:42:52,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:42:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:42:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2019-11-23 20:42:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:42:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-11-23 20:42:52,687 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 39 [2019-11-23 20:42:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:52,687 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-11-23 20:42:52,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:42:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-11-23 20:42:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:42:52,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:52,689 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:52,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:52,893 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1528313637, now seen corresponding path program 5 times [2019-11-23 20:42:52,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:52,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713601376] [2019-11-23 20:42:52,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:52,907 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:52,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347613517] [2019-11-23 20:42:52,908 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 20:43:11,394 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:43:11,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:11,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:43:11,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:43:11,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713601376] [2019-11-23 20:43:11,485 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:11,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347613517] [2019-11-23 20:43:11,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:11,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:43:11,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715779635] [2019-11-23 20:43:11,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:43:11,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:43:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:43:11,487 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 8 states. [2019-11-23 20:43:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:11,583 INFO L93 Difference]: Finished difference Result 154 states and 195 transitions. [2019-11-23 20:43:11,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:43:11,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2019-11-23 20:43:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:11,584 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:43:11,584 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:43:11,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 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 20:43:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:43:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2019-11-23 20:43:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:43:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2019-11-23 20:43:11,596 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 54 [2019-11-23 20:43:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:11,597 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2019-11-23 20:43:11,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:43:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2019-11-23 20:43:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:43:11,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:11,598 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:11,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:11,811 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:11,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2036509453, now seen corresponding path program 6 times [2019-11-23 20:43:11,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:11,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247431669] [2019-11-23 20:43:11,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:11,818 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:11,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705848568] [2019-11-23 20:43:11,818 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 20:43:11,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:43:11,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:11,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:43:11,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:43:11,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247431669] [2019-11-23 20:43:11,912 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:11,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705848568] [2019-11-23 20:43:11,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:11,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:43:11,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408375427] [2019-11-23 20:43:11,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:43:11,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:43:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:43:11,915 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand 6 states. [2019-11-23 20:43:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:12,025 INFO L93 Difference]: Finished difference Result 210 states and 267 transitions. [2019-11-23 20:43:12,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:43:12,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2019-11-23 20:43:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:12,028 INFO L225 Difference]: With dead ends: 210 [2019-11-23 20:43:12,028 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 20:43:12,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 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 20:43:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 20:43:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 96. [2019-11-23 20:43:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:43:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2019-11-23 20:43:12,049 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 62 [2019-11-23 20:43:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:12,050 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2019-11-23 20:43:12,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:43:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2019-11-23 20:43:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:43:12,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:12,057 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:12,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:12,265 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1722288743, now seen corresponding path program 7 times [2019-11-23 20:43:12,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:12,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678621857] [2019-11-23 20:43:12,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:12,271 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:12,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606299501] [2019-11-23 20:43:12,271 INFO L92 rtionOrderModulation]: Changing assertion order to 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 20:43:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:12,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:43:12,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2019-11-23 20:43:12,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678621857] [2019-11-23 20:43:12,418 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:12,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606299501] [2019-11-23 20:43:12,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:12,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:43:12,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608400776] [2019-11-23 20:43:12,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:43:12,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:12,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:43:12,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:43:12,420 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand 9 states. [2019-11-23 20:43:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:12,515 INFO L93 Difference]: Finished difference Result 218 states and 279 transitions. [2019-11-23 20:43:12,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:43:12,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2019-11-23 20:43:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:12,517 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:43:12,517 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:43:12,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 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 20:43:12,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:43:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2019-11-23 20:43:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:43:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2019-11-23 20:43:12,529 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 80 [2019-11-23 20:43:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:12,530 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2019-11-23 20:43:12,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:43:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2019-11-23 20:43:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:43:12,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:12,531 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:12,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:12,735 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:12,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:12,735 INFO L82 PathProgramCache]: Analyzing trace with hash -156056031, now seen corresponding path program 8 times [2019-11-23 20:43:12,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:12,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039820586] [2019-11-23 20:43:12,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:12,742 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:12,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858427268] [2019-11-23 20:43:12,742 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 20:43:12,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:43:12,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:12,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:43:12,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-11-23 20:43:12,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039820586] [2019-11-23 20:43:12,913 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:12,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858427268] [2019-11-23 20:43:12,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:12,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:43:12,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135803879] [2019-11-23 20:43:12,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:43:12,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:43:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:43:12,915 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand 10 states. [2019-11-23 20:43:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:13,032 INFO L93 Difference]: Finished difference Result 247 states and 315 transitions. [2019-11-23 20:43:13,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:43:13,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2019-11-23 20:43:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:13,034 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:43:13,034 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:43:13,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:43:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:43:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2019-11-23 20:43:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:43:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2019-11-23 20:43:13,045 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 91 [2019-11-23 20:43:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:13,046 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2019-11-23 20:43:13,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:43:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2019-11-23 20:43:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:43:13,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:13,047 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:13,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:13,251 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:13,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:13,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1354472153, now seen corresponding path program 9 times [2019-11-23 20:43:13,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:13,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771102644] [2019-11-23 20:43:13,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:13,257 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:13,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059073080] [2019-11-23 20:43:13,257 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 20:43:13,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:43:13,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:13,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:43:13,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:13,387 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 20:43:13,388 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:43:13,391 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:43:13,391 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:43:13,392 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-23 20:43:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:43:13,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771102644] [2019-11-23 20:43:13,407 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:13,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059073080] [2019-11-23 20:43:13,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:13,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 20:43:13,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54696633] [2019-11-23 20:43:13,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:43:13,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:43:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:43:13,409 INFO L87 Difference]: Start difference. First operand 124 states and 159 transitions. Second operand 6 states. [2019-11-23 20:43:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:13,473 INFO L93 Difference]: Finished difference Result 239 states and 311 transitions. [2019-11-23 20:43:13,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:43:13,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2019-11-23 20:43:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:13,475 INFO L225 Difference]: With dead ends: 239 [2019-11-23 20:43:13,475 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 20:43:13,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 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 20:43:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 20:43:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2019-11-23 20:43:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:43:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2019-11-23 20:43:13,487 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 102 [2019-11-23 20:43:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:13,488 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2019-11-23 20:43:13,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:43:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2019-11-23 20:43:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:43:13,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:13,489 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:13,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:13,692 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:13,693 INFO L82 PathProgramCache]: Analyzing trace with hash 863158245, now seen corresponding path program 1 times [2019-11-23 20:43:13,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:13,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329889230] [2019-11-23 20:43:13,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:13,700 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:13,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186199644] [2019-11-23 20:43:13,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:43:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:13,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:43:13,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-11-23 20:43:13,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329889230] [2019-11-23 20:43:13,887 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:13,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186199644] [2019-11-23 20:43:13,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:13,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:43:13,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414499852] [2019-11-23 20:43:13,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:43:13,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:43:13,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:43:13,891 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand 11 states. [2019-11-23 20:43:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:14,032 INFO L93 Difference]: Finished difference Result 276 states and 349 transitions. [2019-11-23 20:43:14,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:43:14,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2019-11-23 20:43:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:14,034 INFO L225 Difference]: With dead ends: 276 [2019-11-23 20:43:14,034 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:43:14,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:43:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:43:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 138. [2019-11-23 20:43:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:43:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2019-11-23 20:43:14,046 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 102 [2019-11-23 20:43:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:14,046 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2019-11-23 20:43:14,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:43:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2019-11-23 20:43:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:43:14,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:14,048 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:14,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:14,251 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:14,251 INFO L82 PathProgramCache]: Analyzing trace with hash 565445987, now seen corresponding path program 2 times [2019-11-23 20:43:14,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:14,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321236087] [2019-11-23 20:43:14,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:14,258 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:14,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480405265] [2019-11-23 20:43:14,258 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:14,372 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:43:14,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:14,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:43:14,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-23 20:43:14,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321236087] [2019-11-23 20:43:14,501 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:14,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480405265] [2019-11-23 20:43:14,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:14,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:43:14,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630339461] [2019-11-23 20:43:14,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:43:14,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:14,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:43:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:43:14,503 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand 12 states. [2019-11-23 20:43:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:14,646 INFO L93 Difference]: Finished difference Result 305 states and 385 transitions. [2019-11-23 20:43:14,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:43:14,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2019-11-23 20:43:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:14,647 INFO L225 Difference]: With dead ends: 305 [2019-11-23 20:43:14,647 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 20:43:14,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:43:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 20:43:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 152. [2019-11-23 20:43:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 20:43:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2019-11-23 20:43:14,661 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 113 [2019-11-23 20:43:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:14,661 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2019-11-23 20:43:14,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:43:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2019-11-23 20:43:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:43:14,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:14,663 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 18, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:14,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:14,866 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1542088923, now seen corresponding path program 3 times [2019-11-23 20:43:14,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:14,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066987342] [2019-11-23 20:43:14,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:14,874 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:14,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723736474] [2019-11-23 20:43:14,874 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:15,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:43:15,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:15,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:43:15,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2019-11-23 20:43:15,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066987342] [2019-11-23 20:43:15,805 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:15,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723736474] [2019-11-23 20:43:15,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:15,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:43:15,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15672112] [2019-11-23 20:43:15,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:43:15,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:15,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:43:15,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:43:15,807 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 13 states. [2019-11-23 20:43:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:15,965 INFO L93 Difference]: Finished difference Result 334 states and 421 transitions. [2019-11-23 20:43:15,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:43:15,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 124 [2019-11-23 20:43:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:15,966 INFO L225 Difference]: With dead ends: 334 [2019-11-23 20:43:15,967 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:43:15,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:43:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:43:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 166. [2019-11-23 20:43:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 20:43:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2019-11-23 20:43:15,979 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 124 [2019-11-23 20:43:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:15,980 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2019-11-23 20:43:15,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:43:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2019-11-23 20:43:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:43:15,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:15,981 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 20, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:16,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:16,194 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash 855801123, now seen corresponding path program 4 times [2019-11-23 20:43:16,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:16,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099206577] [2019-11-23 20:43:16,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:16,202 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:16,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663438397] [2019-11-23 20:43:16,203 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:16,293 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:43:16,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:16,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:43:16,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1642 backedges. 117 proven. 1000 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-11-23 20:43:16,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099206577] [2019-11-23 20:43:16,537 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:16,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663438397] [2019-11-23 20:43:16,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:16,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 20:43:16,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524781298] [2019-11-23 20:43:16,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:43:16,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:43:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:43:16,538 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand 17 states. [2019-11-23 20:43:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:17,104 INFO L93 Difference]: Finished difference Result 494 states and 617 transitions. [2019-11-23 20:43:17,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:43:17,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-11-23 20:43:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:17,106 INFO L225 Difference]: With dead ends: 494 [2019-11-23 20:43:17,107 INFO L226 Difference]: Without dead ends: 458 [2019-11-23 20:43:17,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:43:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-11-23 20:43:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 199. [2019-11-23 20:43:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-23 20:43:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2019-11-23 20:43:17,125 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 135 [2019-11-23 20:43:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:17,127 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2019-11-23 20:43:17,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:43:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2019-11-23 20:43:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:43:17,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:17,129 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 39, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:17,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:17,332 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1609734887, now seen corresponding path program 5 times [2019-11-23 20:43:17,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:17,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401066702] [2019-11-23 20:43:17,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:17,341 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:17,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106410655] [2019-11-23 20:43:17,342 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true